{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43464", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:56.011Z", "datePublished": "2026-05-08T14:22:26.039Z", "dateUpdated": "2026-05-11T22:25:06.725Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:25:06.725Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: RX, Fix XDP multi-buf frag counting for legacy RQ\n\nXDP multi-buf programs can modify the layout of the XDP buffer when the\nprogram calls bpf_xdp_pull_data() or bpf_xdp_adjust_tail(). The\nreferenced commit in the fixes tag corrected the assumption in the mlx5\ndriver that the XDP buffer layout doesn't change during a program\nexecution. However, this fix introduced another issue: the dropped\nfragments still need to be counted on the driver side to avoid page\nfragment reference counting issues.\n\nSuch issue can be observed with the\ntest_xdp_native_adjst_tail_shrnk_data selftest when using a payload of\n3600 and shrinking by 256 bytes (an upcoming selftest patch): the last\nfragment gets released by the XDP code but doesn't get tracked by the\ndriver. This results in a negative pp_ref_count during page release and\nthe following splat:\n\n WARNING: include/net/page_pool/helpers.h:297 at mlx5e_page_release_fragmented.isra.0+0x4a/0x50 [mlx5_core], CPU#12: ip/3137\n Modules linked in: [...]\n CPU: 12 UID: 0 PID: 3137 Comm: ip Not tainted 6.19.0-rc3+ #12 NONE\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014\n RIP: 0010:mlx5e_page_release_fragmented.isra.0+0x4a/0x50 [mlx5_core]\n [...]\n Call Trace:\n <TASK>\n mlx5e_dealloc_rx_wqe+0xcb/0x1a0 [mlx5_core]\n mlx5e_free_rx_descs+0x7f/0x110 [mlx5_core]\n mlx5e_close_rq+0x50/0x60 [mlx5_core]\n mlx5e_close_queues+0x36/0x2c0 [mlx5_core]\n mlx5e_close_channel+0x1c/0x50 [mlx5_core]\n mlx5e_close_channels+0x45/0x80 [mlx5_core]\n mlx5e_safe_switch_params+0x1a5/0x230 [mlx5_core]\n mlx5e_change_mtu+0xf3/0x2f0 [mlx5_core]\n netif_set_mtu_ext+0xf1/0x230\n do_setlink.isra.0+0x219/0x1180\n rtnl_newlink+0x79f/0xb60\n rtnetlink_rcv_msg+0x213/0x3a0\n netlink_rcv_skb+0x48/0xf0\n netlink_unicast+0x24a/0x350\n netlink_sendmsg+0x1ee/0x410\n __sock_sendmsg+0x38/0x60\n ____sys_sendmsg+0x232/0x280\n ___sys_sendmsg+0x78/0xb0\n __sys_sendmsg+0x5f/0xb0\n [...]\n do_syscall_64+0x57/0xc50\n\nThis patch fixes the issue by doing page frag counting on all the\noriginal XDP buffer fragments for all relevant XDP actions (XDP_TX ,\nXDP_REDIRECT and XDP_PASS). This is basically reverting to the original\ncounting before the commit in the fixes tag.\n\nAs frag_page is still pointing to the original tail, the nr_frags\nparameter to xdp_update_skb_frags_info() needs to be calculated\nin a different way to reflect the new nr_frags."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/ethernet/mellanox/mlx5/core/en_rx.c"], "versions": [{"version": "afd5ba577c10639f62e8120df67dc70ea4b61176", "lessThan": "c74557495efb4bd0adefdfc8678ecdbc82a06da3", "status": "affected", "versionType": "git"}, {"version": "afd5ba577c10639f62e8120df67dc70ea4b61176", "lessThan": "03cb50e5b74fce8bf6d92b860371b66253cf0f8d", "status": "affected", "versionType": "git"}, {"version": "afd5ba577c10639f62e8120df67dc70ea4b61176", "lessThan": "a6413e6f6c9d9bb9833324cb3753582f7bc0f2fa", "status": "affected", "versionType": "git"}, {"version": "72328f25755ee966724f46e3a0e8e59bef2091ba", "status": "affected", "versionType": "git"}, {"version": "0049fd63881505566824e88cfa624638f921c808", "status": "affected", "versionType": "git"}, {"version": "d969645b9b7810289bf3c353ea06957373756b8e", "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/mellanox/mlx5/core/en_rx.c"], "versions": [{"version": "6.18", "status": "affected"}, {"version": "0", "lessThan": "6.18", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.19", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.9", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "6.18", "versionEndExcluding": "6.18.19"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "6.19.9"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18", "versionEndExcluding": "7.0"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.115"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.56"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17.6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c74557495efb4bd0adefdfc8678ecdbc82a06da3"}, {"url": "https://git.kernel.org/stable/c/03cb50e5b74fce8bf6d92b860371b66253cf0f8d"}, {"url": "https://git.kernel.org/stable/c/a6413e6f6c9d9bb9833324cb3753582f7bc0f2fa"}], "title": "net/mlx5e: RX, Fix XDP multi-buf frag counting for legacy RQ", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: RX, Fix XDP multi-buf frag counting for legacy RQ\n\nXDP multi-buf programs can modify the layout of the XDP buffer when the\nprogram calls bpf_xdp_pull_data() or bpf_xdp_adjust_tail(). The\nreferenced commit in the fixes tag corrected the assumption in the mlx5\ndriver that the XDP buffer layout doesn't change during a program\nexecution. However, this fix introduced another issue: the dropped\nfragments still need to be counted on the driver side to avoid page\nfragment reference counting issues.\n\nSuch issue can be observed with the\ntest_xdp_native_adjst_tail_shrnk_data selftest when using a payload of\n3600 and shrinking by 256 bytes (an upcoming selftest patch): the last\nfragment gets released by the XDP code but doesn't get tracked by the\ndriver. This results in a negative pp_ref_count during page release and\nthe following splat:\n\n WARNING: include/net/page_pool/helpers.h:297 at mlx5e_page_release_fragmented.isra.0+0x4a/0x50 [mlx5_core], CPU#12: ip/3137\n Modules linked in: [...]\n CPU: 12 UID: 0 PID: 3137 Comm: ip Not tainted 6.19.0-rc3+ #12 NONE\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014\n RIP: 0010:mlx5e_page_release_fragmented.isra.0+0x4a/0x50 [mlx5_core]\n [...]\n Call Trace:\n <TASK>\n mlx5e_dealloc_rx_wqe+0xcb/0x1a0 [mlx5_core]\n mlx5e_free_rx_descs+0x7f/0x110 [mlx5_core]\n mlx5e_close_rq+0x50/0x60 [mlx5_core]\n mlx5e_close_queues+0x36/0x2c0 [mlx5_core]\n mlx5e_close_channel+0x1c/0x50 [mlx5_core]\n mlx5e_close_channels+0x45/0x80 [mlx5_core]\n mlx5e_safe_switch_params+0x1a5/0x230 [mlx5_core]\n mlx5e_change_mtu+0xf3/0x2f0 [mlx5_core]\n netif_set_mtu_ext+0xf1/0x230\n do_setlink.isra.0+0x219/0x1180\n rtnl_newlink+0x79f/0xb60\n rtnetlink_rcv_msg+0x213/0x3a0\n netlink_rcv_skb+0x48/0xf0\n netlink_unicast+0x24a/0x350\n netlink_sendmsg+0x1ee/0x410\n __sock_sendmsg+0x38/0x60\n ____sys_sendmsg+0x232/0x280\n ___sys_sendmsg+0x78/0xb0\n __sys_sendmsg+0x5f/0xb0\n [...]\n do_syscall_64+0x57/0xc50\n\nThis patch fixes the issue by doing page frag counting on all the\noriginal XDP buffer fragments for all relevant XDP actions (XDP_TX ,\nXDP_REDIRECT and XDP_PASS). This is basically reverting to the original\ncounting before the commit in the fixes tag.\n\nAs frag_page is still pointing to the original tail, the nr_frags\nparameter to xdp_update_skb_frags_info() needs to be calculated\nin a different way to reflect the new nr_frags."}], "id": "CVE-2026-43464", "lastModified": "2026-05-12T14:10:27.343", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-05-08T15:16:59.283", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/03cb50e5b74fce8bf6d92b860371b66253cf0f8d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a6413e6f6c9d9bb9833324cb3753582f7bc0f2fa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c74557495efb4bd0adefdfc8678ecdbc82a06da3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: net/mlx5e: RX, Fix XDP multi-buf frag counting for legacy RQ", "id": "2468236", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468236"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-911", "details": ["A flaw was found in the Linux kernel's mlx5e driver. When using eXpress Data Path (XDP) multi-buffer programs, an attacker could manipulate the XDP buffer layout. This manipulation leads to incorrect tracking of page fragments, causing a critical error in memory management. The issue can result in a system crash or denial of service."], "name": "CVE-2026-43464", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43464\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43464\nhttps://lore.kernel.org/linux-cve-announce/2026050802-CVE-2026-43464-5c7a@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[afd5ba577c10639f62e8120df67dc70ea4b61176,c74557495efb4bd0adefdfc8678ecdbc82a06da3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[afd5ba577c10639f62e8120df67dc70ea4b61176,03cb50e5b74fce8bf6d92b860371b66253cf0f8d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[afd5ba577c10639f62e8120df67dc70ea4b61176,a6413e6f6c9d9bb9833324cb3753582f7bc0f2fa)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "72328f25755ee966724f46e3a0e8e59bef2091ba"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "0049fd63881505566824e88cfa624638f921c808"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "d969645b9b7810289bf3c353ea06957373756b8e"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.19,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.9,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-08T19:15:14.827791+00:00", "updated": "2026-05-11T09:15:26.610049+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}