{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-49626", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:21:30.421Z", "datePublished": "2025-02-26T02:23:41.274Z", "dateUpdated": "2026-05-11T19:03:34.174Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:03:34.174Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsfc: fix use after free when disabling sriov\n\nUse after free is detected by kfence when disabling sriov. What was read\nafter being freed was vf->pci_dev: it was freed from pci_disable_sriov\nand later read in efx_ef10_sriov_free_vf_vports, called from\nefx_ef10_sriov_free_vf_vswitching.\n\nSet the pointer to NULL at release time to not trying to read it later.\n\nReproducer and dmesg log (note that kfence doesn't detect it every time):\n$ echo 1 > /sys/class/net/enp65s0f0np0/device/sriov_numvfs\n$ echo 0 > /sys/class/net/enp65s0f0np0/device/sriov_numvfs\n\n BUG: KFENCE: use-after-free read in efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc]\n\n Use-after-free read at 0x00000000ff3c1ba5 (in kfence-#224):\n efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc]\n efx_ef10_pci_sriov_disable+0x38/0x70 [sfc]\n efx_pci_sriov_configure+0x24/0x40 [sfc]\n sriov_numvfs_store+0xfe/0x140\n kernfs_fop_write_iter+0x11c/0x1b0\n new_sync_write+0x11f/0x1b0\n vfs_write+0x1eb/0x280\n ksys_write+0x5f/0xe0\n do_syscall_64+0x5c/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n kfence-#224: 0x00000000edb8ef95-0x00000000671f5ce1, size=2792, cache=kmalloc-4k\n\n allocated by task 6771 on cpu 10 at 3137.860196s:\n pci_alloc_dev+0x21/0x60\n pci_iov_add_virtfn+0x2a2/0x320\n sriov_enable+0x212/0x3e0\n efx_ef10_sriov_configure+0x67/0x80 [sfc]\n efx_pci_sriov_configure+0x24/0x40 [sfc]\n sriov_numvfs_store+0xba/0x140\n kernfs_fop_write_iter+0x11c/0x1b0\n new_sync_write+0x11f/0x1b0\n vfs_write+0x1eb/0x280\n ksys_write+0x5f/0xe0\n do_syscall_64+0x5c/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n freed by task 6771 on cpu 12 at 3170.991309s:\n device_release+0x34/0x90\n kobject_cleanup+0x3a/0x130\n pci_iov_remove_virtfn+0xd9/0x120\n sriov_disable+0x30/0xe0\n efx_ef10_pci_sriov_disable+0x57/0x70 [sfc]\n efx_pci_sriov_configure+0x24/0x40 [sfc]\n sriov_numvfs_store+0xfe/0x140\n kernfs_fop_write_iter+0x11c/0x1b0\n new_sync_write+0x11f/0x1b0\n vfs_write+0x1eb/0x280\n ksys_write+0x5f/0xe0\n do_syscall_64+0x5c/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/sfc/ef10_sriov.c"], "versions": [{"version": "3c5eb87605e85146a78de589b5070a37862425db", "lessThan": "3199e34912d84cdfb8a93a984c5ae5c73fb13e84", "status": "affected", "versionType": "git"}, {"version": "3c5eb87605e85146a78de589b5070a37862425db", "lessThan": "c9e75bb22a26e391f189f5a5133dd63dcb57fdaa", "status": "affected", "versionType": "git"}, {"version": "3c5eb87605e85146a78de589b5070a37862425db", "lessThan": "9c854ae512b89229aeee93849e9bd4c115b37909", "status": "affected", "versionType": "git"}, {"version": "3c5eb87605e85146a78de589b5070a37862425db", "lessThan": "bcad880865bfb421885364b1f0c7351280fe2b97", "status": "affected", "versionType": "git"}, {"version": "3c5eb87605e85146a78de589b5070a37862425db", "lessThan": "c2240500817b3b4b996cdf2a461a3a5679f49b94", "status": "affected", "versionType": "git"}, {"version": "3c5eb87605e85146a78de589b5070a37862425db", "lessThan": "58d93e9d160c0de6d867c7eb4c2206671a351eb1", "status": "affected", "versionType": "git"}, {"version": "3c5eb87605e85146a78de589b5070a37862425db", "lessThan": "e435c4aeeaa073091f7f3b7735af2ef5c97d63f2", "status": "affected", "versionType": "git"}, {"version": "3c5eb87605e85146a78de589b5070a37862425db", "lessThan": "ebe41da5d47ac0fff877e57bd14c54dccf168827", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/sfc/ef10_sriov.c"], "versions": [{"version": "4.2", "status": "affected"}, {"version": "0", "lessThan": "4.2", "status": "unaffected", "versionType": "semver"}, {"version": "4.9.324", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.289", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.253", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.207", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.132", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.56", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18.13", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "4.9.324"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "4.14.289"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "4.19.253"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "5.4.207"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "5.10.132"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "5.15.56"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "5.18.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.2", "versionEndExcluding": "5.19"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3199e34912d84cdfb8a93a984c5ae5c73fb13e84"}, {"url": "https://git.kernel.org/stable/c/c9e75bb22a26e391f189f5a5133dd63dcb57fdaa"}, {"url": "https://git.kernel.org/stable/c/9c854ae512b89229aeee93849e9bd4c115b37909"}, {"url": "https://git.kernel.org/stable/c/bcad880865bfb421885364b1f0c7351280fe2b97"}, {"url": "https://git.kernel.org/stable/c/c2240500817b3b4b996cdf2a461a3a5679f49b94"}, {"url": "https://git.kernel.org/stable/c/58d93e9d160c0de6d867c7eb4c2206671a351eb1"}, {"url": "https://git.kernel.org/stable/c/e435c4aeeaa073091f7f3b7735af2ef5c97d63f2"}, {"url": "https://git.kernel.org/stable/c/ebe41da5d47ac0fff877e57bd14c54dccf168827"}], "title": "sfc: fix use after free when disabling sriov", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2022-49626", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2025-02-27T18:15:26.254621Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-27T18:22:31.594Z"}}]}}

{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2022-49626", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:21:30.421Z", "datePublished": "2025-02-26T02:23:41.274Z", "dateUpdated": "2025-02-27T18:22:31.594Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-02-26T02:23:41.274Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsfc: fix use after free when disabling sriov\n\nUse after free is detected by kfence when disabling sriov. What was read\nafter being freed was vf->pci_dev: it was freed from pci_disable_sriov\nand later read in efx_ef10_sriov_free_vf_vports, called from\nefx_ef10_sriov_free_vf_vswitching.\n\nSet the pointer to NULL at release time to not trying to read it later.\n\nReproducer and dmesg log (note that kfence doesn't detect it every time):\n$ echo 1 > /sys/class/net/enp65s0f0np0/device/sriov_numvfs\n$ echo 0 > /sys/class/net/enp65s0f0np0/device/sriov_numvfs\n\n BUG: KFENCE: use-after-free read in efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc]\n\n Use-after-free read at 0x00000000ff3c1ba5 (in kfence-#224):\n efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc]\n efx_ef10_pci_sriov_disable+0x38/0x70 [sfc]\n efx_pci_sriov_configure+0x24/0x40 [sfc]\n sriov_numvfs_store+0xfe/0x140\n kernfs_fop_write_iter+0x11c/0x1b0\n new_sync_write+0x11f/0x1b0\n vfs_write+0x1eb/0x280\n ksys_write+0x5f/0xe0\n do_syscall_64+0x5c/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n kfence-#224: 0x00000000edb8ef95-0x00000000671f5ce1, size=2792, cache=kmalloc-4k\n\n allocated by task 6771 on cpu 10 at 3137.860196s:\n pci_alloc_dev+0x21/0x60\n pci_iov_add_virtfn+0x2a2/0x320\n sriov_enable+0x212/0x3e0\n efx_ef10_sriov_configure+0x67/0x80 [sfc]\n efx_pci_sriov_configure+0x24/0x40 [sfc]\n sriov_numvfs_store+0xba/0x140\n kernfs_fop_write_iter+0x11c/0x1b0\n new_sync_write+0x11f/0x1b0\n vfs_write+0x1eb/0x280\n ksys_write+0x5f/0xe0\n do_syscall_64+0x5c/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n freed by task 6771 on cpu 12 at 3170.991309s:\n device_release+0x34/0x90\n kobject_cleanup+0x3a/0x130\n pci_iov_remove_virtfn+0xd9/0x120\n sriov_disable+0x30/0xe0\n efx_ef10_pci_sriov_disable+0x57/0x70 [sfc]\n efx_pci_sriov_configure+0x24/0x40 [sfc]\n sriov_numvfs_store+0xfe/0x140\n kernfs_fop_write_iter+0x11c/0x1b0\n new_sync_write+0x11f/0x1b0\n vfs_write+0x1eb/0x280\n ksys_write+0x5f/0xe0\n do_syscall_64+0x5c/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/sfc/ef10_sriov.c"], "versions": [{"version": "3c5eb87605e85146a78de589b5070a37862425db", "lessThan": "3199e34912d84cdfb8a93a984c5ae5c73fb13e84", "status": "affected", "versionType": "git"}, {"version": "3c5eb87605e85146a78de589b5070a37862425db", "lessThan": "c9e75bb22a26e391f189f5a5133dd63dcb57fdaa", "status": "affected", "versionType": "git"}, {"version": "3c5eb87605e85146a78de589b5070a37862425db", "lessThan": "9c854ae512b89229aeee93849e9bd4c115b37909", "status": "affected", "versionType": "git"}, {"version": "3c5eb87605e85146a78de589b5070a37862425db", "lessThan": "bcad880865bfb421885364b1f0c7351280fe2b97", "status": "affected", "versionType": "git"}, {"version": "3c5eb87605e85146a78de589b5070a37862425db", "lessThan": "c2240500817b3b4b996cdf2a461a3a5679f49b94", "status": "affected", "versionType": "git"}, {"version": "3c5eb87605e85146a78de589b5070a37862425db", "lessThan": "58d93e9d160c0de6d867c7eb4c2206671a351eb1", "status": "affected", "versionType": "git"}, {"version": "3c5eb87605e85146a78de589b5070a37862425db", "lessThan": "e435c4aeeaa073091f7f3b7735af2ef5c97d63f2", "status": "affected", "versionType": "git"}, {"version": "3c5eb87605e85146a78de589b5070a37862425db", "lessThan": "ebe41da5d47ac0fff877e57bd14c54dccf168827", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/sfc/ef10_sriov.c"], "versions": [{"version": "4.2", "status": "affected"}, {"version": "0", "lessThan": "4.2", "status": "unaffected", "versionType": "semver"}, {"version": "4.9.324", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.289", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.253", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.207", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.132", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.56", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.18.13", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/3199e34912d84cdfb8a93a984c5ae5c73fb13e84"}, {"url": "https://git.kernel.org/stable/c/c9e75bb22a26e391f189f5a5133dd63dcb57fdaa"}, {"url": "https://git.kernel.org/stable/c/9c854ae512b89229aeee93849e9bd4c115b37909"}, {"url": "https://git.kernel.org/stable/c/bcad880865bfb421885364b1f0c7351280fe2b97"}, {"url": "https://git.kernel.org/stable/c/c2240500817b3b4b996cdf2a461a3a5679f49b94"}, {"url": "https://git.kernel.org/stable/c/58d93e9d160c0de6d867c7eb4c2206671a351eb1"}, {"url": "https://git.kernel.org/stable/c/e435c4aeeaa073091f7f3b7735af2ef5c97d63f2"}, {"url": "https://git.kernel.org/stable/c/ebe41da5d47ac0fff877e57bd14c54dccf168827"}], "title": "sfc: fix use after free when disabling sriov", "x_generator": {"engine": "bippy-5f407fcff5a0"}}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2022-49626", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2025-02-27T18:15:26.254621Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-27T18:15:27.581Z"}}]}}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "2423841B-6626-4BBC-967E-B6216D5DB225", "versionEndExcluding": "4.9.324", "versionStartIncluding": "4.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9209AEEF-782D-43E6-AA5C-9F5B9CD6ED11", "versionEndExcluding": "4.14.289", "versionStartIncluding": "4.10", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "2B22ACD7-9025-4AD5-AD6E-A929DEC79B75", "versionEndExcluding": "4.19.253", "versionStartIncluding": "4.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C27A52F3-82C8-4F03-BE80-38D11CDBD503", "versionEndExcluding": "5.4.207", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "46CE9FE9-22E3-45CA-8B5F-190C2CAFC5CE", "versionEndExcluding": "5.10.132", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "AF59CE2F-BA66-4BFD-83AB-4576F3D1B49A", "versionEndExcluding": "5.15.56", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "640221A7-96EE-4B48-8FE1-BA810131789B", "versionEndExcluding": "5.18.13", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*", "matchCriteriaId": "A8C30C2D-F82D-4D37-AB48-D76ABFBD5377", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*", "matchCriteriaId": "BF8547FC-C849-4F1B-804B-A93AE2F04A92", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*", "matchCriteriaId": "F3068028-F453-4A1C-B80F-3F5609ACEF60", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:*", "matchCriteriaId": "2E9C0DB0-D349-489F-A3D6-B77214E93A8A", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc5:*:*:*:*:*:*", "matchCriteriaId": "1A0DE3B7-0FFB-45AA-9BD6-19870CA7C6FD", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.19:rc6:*:*:*:*:*:*", "matchCriteriaId": "00AE778B-BAEE-49EB-9F84-003B73D7862A", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsfc: fix use after free when disabling sriov\n\nUse after free is detected by kfence when disabling sriov. What was read\nafter being freed was vf->pci_dev: it was freed from pci_disable_sriov\nand later read in efx_ef10_sriov_free_vf_vports, called from\nefx_ef10_sriov_free_vf_vswitching.\n\nSet the pointer to NULL at release time to not trying to read it later.\n\nReproducer and dmesg log (note that kfence doesn't detect it every time):\n$ echo 1 > /sys/class/net/enp65s0f0np0/device/sriov_numvfs\n$ echo 0 > /sys/class/net/enp65s0f0np0/device/sriov_numvfs\n\n BUG: KFENCE: use-after-free read in efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc]\n\n Use-after-free read at 0x00000000ff3c1ba5 (in kfence-#224):\n efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc]\n efx_ef10_pci_sriov_disable+0x38/0x70 [sfc]\n efx_pci_sriov_configure+0x24/0x40 [sfc]\n sriov_numvfs_store+0xfe/0x140\n kernfs_fop_write_iter+0x11c/0x1b0\n new_sync_write+0x11f/0x1b0\n vfs_write+0x1eb/0x280\n ksys_write+0x5f/0xe0\n do_syscall_64+0x5c/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n kfence-#224: 0x00000000edb8ef95-0x00000000671f5ce1, size=2792, cache=kmalloc-4k\n\n allocated by task 6771 on cpu 10 at 3137.860196s:\n pci_alloc_dev+0x21/0x60\n pci_iov_add_virtfn+0x2a2/0x320\n sriov_enable+0x212/0x3e0\n efx_ef10_sriov_configure+0x67/0x80 [sfc]\n efx_pci_sriov_configure+0x24/0x40 [sfc]\n sriov_numvfs_store+0xba/0x140\n kernfs_fop_write_iter+0x11c/0x1b0\n new_sync_write+0x11f/0x1b0\n vfs_write+0x1eb/0x280\n ksys_write+0x5f/0xe0\n do_syscall_64+0x5c/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae\n\n freed by task 6771 on cpu 12 at 3170.991309s:\n device_release+0x34/0x90\n kobject_cleanup+0x3a/0x130\n pci_iov_remove_virtfn+0xd9/0x120\n sriov_disable+0x30/0xe0\n efx_ef10_pci_sriov_disable+0x57/0x70 [sfc]\n efx_pci_sriov_configure+0x24/0x40 [sfc]\n sriov_numvfs_store+0xfe/0x140\n kernfs_fop_write_iter+0x11c/0x1b0\n new_sync_write+0x11f/0x1b0\n vfs_write+0x1eb/0x280\n ksys_write+0x5f/0xe0\n do_syscall_64+0x5c/0x80\n entry_SYSCALL_64_after_hwframe+0x44/0xae"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sfc: se corrige el use-after-free al deshabilitar sriov. El use-after-free es detectado por kfence al deshabilitar sriov. Lo que se ley\u00f3 despu\u00e9s de ser liberado fue vf->pci_dev: se liber\u00f3 de pci_disable_sriov y luego se ley\u00f3 en efx_ef10_sriov_free_vf_vports, llamado desde efx_ef10_sriov_free_vf_vswitching. Establezca el puntero en NULL en el momento de la liberaci\u00f3n para no intentar leerlo m\u00e1s tarde. Registro del reproductor y dmesg (tenga en cuenta que kfence no lo detecta cada vez): $ echo 1 > /sys/class/net/enp65s0f0np0/device/sriov_numvfs $ echo 0 > /sys/class/net/enp65s0f0np0/device/sriov_numvfs BUG: KFENCE: use-after-free read in efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc] Use-after-free read at 0x00000000ff3c1ba5 (in kfence-#224): efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc] efx_ef10_pci_sriov_disable+0x38/0x70 [sfc] efx_pci_sriov_configure+0x24/0x40 [sfc] sriov_numvfs_store+0xfe/0x140 kernfs_fop_write_iter+0x11c/0x1b0 new_sync_write+0x11f/0x1b0 vfs_write+0x1eb/0x280 ksys_write+0x5f/0xe0 do_syscall_64+0x5c/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae kfence-#224: 0x00000000edb8ef95-0x00000000671f5ce1, size=2792, cache=kmalloc-4k allocated by task 6771 on cpu 10 at 3137.860196s: pci_alloc_dev+0x21/0x60 pci_iov_add_virtfn+0x2a2/0x320 sriov_enable+0x212/0x3e0 efx_ef10_sriov_configure+0x67/0x80 [sfc] efx_pci_sriov_configure+0x24/0x40 [sfc] sriov_numvfs_store+0xba/0x140 kernfs_fop_write_iter+0x11c/0x1b0 new_sync_write+0x11f/0x1b0 vfs_write+0x1eb/0x280 ksys_write+0x5f/0xe0 do_syscall_64+0x5c/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae freed by task 6771 on cpu 12 at 3170.991309s: device_release+0x34/0x90 kobject_cleanup+0x3a/0x130 pci_iov_remove_virtfn+0xd9/0x120 sriov_disable+0x30/0xe0 efx_ef10_pci_sriov_disable+0x57/0x70 [sfc] efx_pci_sriov_configure+0x24/0x40 [sfc] sriov_numvfs_store+0xfe/0x140 kernfs_fop_write_iter+0x11c/0x1b0 new_sync_write+0x11f/0x1b0 vfs_write+0x1eb/0x280 ksys_write+0x5f/0xe0 do_syscall_64+0x5c/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae "}], "id": "CVE-2022-49626", "lastModified": "2025-03-24T19:49:38.357", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2025-02-26T07:01:37.937", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3199e34912d84cdfb8a93a984c5ae5c73fb13e84"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/58d93e9d160c0de6d867c7eb4c2206671a351eb1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9c854ae512b89229aeee93849e9bd4c115b37909"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bcad880865bfb421885364b1f0c7351280fe2b97"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c2240500817b3b4b996cdf2a461a3a5679f49b94"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c9e75bb22a26e391f189f5a5133dd63dcb57fdaa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e435c4aeeaa073091f7f3b7735af2ef5c97d63f2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ebe41da5d47ac0fff877e57bd14c54dccf168827"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"affected_release": [{"advisory": "RHSA-2022:7683", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-425.3.1.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2022-11-08T00:00:00Z"}, {"advisory": "RHSA-2022:8267", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-162.6.1.el9_1", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-11-15T00:00:00Z"}, {"advisory": "RHSA-2022:8267", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-162.6.1.el9_1", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2022-11-15T00:00:00Z"}], "bugzilla": {"description": "kernel: sfc: fix use after free when disabling sriov", "id": "2348032", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2348032"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsfc: fix use after free when disabling sriov\nUse after free is detected by kfence when disabling sriov. What was read\nafter being freed was vf->pci_dev: it was freed from pci_disable_sriov\nand later read in efx_ef10_sriov_free_vf_vports, called from\nefx_ef10_sriov_free_vf_vswitching.\nSet the pointer to NULL at release time to not trying to read it later.\nReproducer and dmesg log (note that kfence doesn't detect it every time):\n$ echo 1 > /sys/class/net/enp65s0f0np0/device/sriov_numvfs\n$ echo 0 > /sys/class/net/enp65s0f0np0/device/sriov_numvfs\nBUG: KFENCE: use-after-free read in efx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc]\nUse-after-free read at 0x00000000ff3c1ba5 (in kfence-#224):\nefx_ef10_sriov_free_vf_vswitching+0x82/0x170 [sfc]\nefx_ef10_pci_sriov_disable+0x38/0x70 [sfc]\nefx_pci_sriov_configure+0x24/0x40 [sfc]\nsriov_numvfs_store+0xfe/0x140\nkernfs_fop_write_iter+0x11c/0x1b0\nnew_sync_write+0x11f/0x1b0\nvfs_write+0x1eb/0x280\nksys_write+0x5f/0xe0\ndo_syscall_64+0x5c/0x80\nentry_SYSCALL_64_after_hwframe+0x44/0xae\nkfence-#224: 0x00000000edb8ef95-0x00000000671f5ce1, size=2792, cache=kmalloc-4k\nallocated by task 6771 on cpu 10 at 3137.860196s:\npci_alloc_dev+0x21/0x60\npci_iov_add_virtfn+0x2a2/0x320\nsriov_enable+0x212/0x3e0\nefx_ef10_sriov_configure+0x67/0x80 [sfc]\nefx_pci_sriov_configure+0x24/0x40 [sfc]\nsriov_numvfs_store+0xba/0x140\nkernfs_fop_write_iter+0x11c/0x1b0\nnew_sync_write+0x11f/0x1b0\nvfs_write+0x1eb/0x280\nksys_write+0x5f/0xe0\ndo_syscall_64+0x5c/0x80\nentry_SYSCALL_64_after_hwframe+0x44/0xae\nfreed by task 6771 on cpu 12 at 3170.991309s:\ndevice_release+0x34/0x90\nkobject_cleanup+0x3a/0x130\npci_iov_remove_virtfn+0xd9/0x120\nsriov_disable+0x30/0xe0\nefx_ef10_pci_sriov_disable+0x57/0x70 [sfc]\nefx_pci_sriov_configure+0x24/0x40 [sfc]\nsriov_numvfs_store+0xfe/0x140\nkernfs_fop_write_iter+0x11c/0x1b0\nnew_sync_write+0x11f/0x1b0\nvfs_write+0x1eb/0x280\nksys_write+0x5f/0xe0\ndo_syscall_64+0x5c/0x80\nentry_SYSCALL_64_after_hwframe+0x44/0xae"], "name": "CVE-2022-49626", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-02-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-49626\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-49626\nhttps://lore.kernel.org/linux-cve-announce/2025022616-CVE-2022-49626-e785@gregkh/T"], "threat_severity": "Moderate"}

{}