{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-50344", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-16T16:03:27.881Z", "datePublished": "2025-09-16T16:11:23.345Z", "dateUpdated": "2026-05-11T19:17:37.555Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:17:37.555Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix null-ptr-deref in ext4_write_info\n\nI caught a null-ptr-deref bug as follows:\n==================================================================\nKASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f]\nCPU: 1 PID: 1589 Comm: umount Not tainted 5.10.0-02219-dirty #339\nRIP: 0010:ext4_write_info+0x53/0x1b0\n[...]\nCall Trace:\n dquot_writeback_dquots+0x341/0x9a0\n ext4_sync_fs+0x19e/0x800\n __sync_filesystem+0x83/0x100\n sync_filesystem+0x89/0xf0\n generic_shutdown_super+0x79/0x3e0\n kill_block_super+0xa1/0x110\n deactivate_locked_super+0xac/0x130\n deactivate_super+0xb6/0xd0\n cleanup_mnt+0x289/0x400\n __cleanup_mnt+0x16/0x20\n task_work_run+0x11c/0x1c0\n exit_to_user_mode_prepare+0x203/0x210\n syscall_exit_to_user_mode+0x5b/0x3a0\n do_syscall_64+0x59/0x70\n entry_SYSCALL_64_after_hwframe+0x44/0xa9\n ==================================================================\n\nAbove issue may happen as follows:\n-------------------------------------\nexit_to_user_mode_prepare\n task_work_run\n __cleanup_mnt\n cleanup_mnt\n deactivate_super\n deactivate_locked_super\n kill_block_super\n generic_shutdown_super\n shrink_dcache_for_umount\n dentry = sb->s_root\n sb->s_root = NULL <--- Here set NULL\n sync_filesystem\n __sync_filesystem\n sb->s_op->sync_fs > ext4_sync_fs\n dquot_writeback_dquots\n sb->dq_op->write_info > ext4_write_info\n ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2)\n d_inode(sb->s_root)\n s_root->d_inode <--- Null pointer dereference\n\nTo solve this problem, we use ext4_journal_start_sb directly\nto avoid s_root being used."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ext4/super.c"], "versions": [{"version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "dc451578446afd03c0c21913993c08898a691435", "status": "affected", "versionType": "git"}, {"version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "f4b5ff0b794aa94afac7269c494550ca2f66511b", "status": "affected", "versionType": "git"}, {"version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "947264e00c46de19a016fd81218118c708fed2f3", "status": "affected", "versionType": "git"}, {"version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "3638aa1c7d87c0ca0aef23cf58cae2c48e7daca4", "status": "affected", "versionType": "git"}, {"version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "f34ab95162763cd7352f46df169296eec28b688d", "status": "affected", "versionType": "git"}, {"version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "533c60a0b97cee5daab376933f486207e6680fb7", "status": "affected", "versionType": "git"}, {"version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "4a657319cfabd6199fd0b7b65bbebf6ded7a11c1", "status": "affected", "versionType": "git"}, {"version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "bb420e8afc854d2a1caaa23a0c129839acfb7888", "status": "affected", "versionType": "git"}, {"version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "f9c1f248607d5546075d3f731e7607d5571f2b60", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ext4/super.c"], "versions": [{"version": "3.6", "status": "affected"}, {"version": "0", "lessThan": "3.6", "status": "unaffected", "versionType": "semver"}, {"version": "4.9.331", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.14.296", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver"}, {"version": "4.19.262", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.220", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.150", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.75", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19.17", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.3", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1", "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": "3.6", "versionEndExcluding": "4.9.331"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "4.14.296"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "4.19.262"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "5.4.220"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "5.10.150"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "5.15.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "5.19.17"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "6.0.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.6", "versionEndExcluding": "6.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/dc451578446afd03c0c21913993c08898a691435"}, {"url": "https://git.kernel.org/stable/c/f4b5ff0b794aa94afac7269c494550ca2f66511b"}, {"url": "https://git.kernel.org/stable/c/947264e00c46de19a016fd81218118c708fed2f3"}, {"url": "https://git.kernel.org/stable/c/3638aa1c7d87c0ca0aef23cf58cae2c48e7daca4"}, {"url": "https://git.kernel.org/stable/c/f34ab95162763cd7352f46df169296eec28b688d"}, {"url": "https://git.kernel.org/stable/c/533c60a0b97cee5daab376933f486207e6680fb7"}, {"url": "https://git.kernel.org/stable/c/4a657319cfabd6199fd0b7b65bbebf6ded7a11c1"}, {"url": "https://git.kernel.org/stable/c/bb420e8afc854d2a1caaa23a0c129839acfb7888"}, {"url": "https://git.kernel.org/stable/c/f9c1f248607d5546075d3f731e7607d5571f2b60"}], "title": "ext4: fix null-ptr-deref in ext4_write_info", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2022-50344", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-14T18:20:39.263791Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-476", "description": "CWE-476 NULL Pointer Dereference"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:22:58.181Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2022-50344", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-14T18:20:39.263791Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-476", "description": "CWE-476 NULL Pointer Dereference"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:20:34.777Z"}}], "cna": {"title": "ext4: fix null-ptr-deref in ext4_write_info", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "dc451578446afd03c0c21913993c08898a691435", "versionType": "git"}, {"status": "affected", "version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "f4b5ff0b794aa94afac7269c494550ca2f66511b", "versionType": "git"}, {"status": "affected", "version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "947264e00c46de19a016fd81218118c708fed2f3", "versionType": "git"}, {"status": "affected", "version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "3638aa1c7d87c0ca0aef23cf58cae2c48e7daca4", "versionType": "git"}, {"status": "affected", "version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "f34ab95162763cd7352f46df169296eec28b688d", "versionType": "git"}, {"status": "affected", "version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "533c60a0b97cee5daab376933f486207e6680fb7", "versionType": "git"}, {"status": "affected", "version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "4a657319cfabd6199fd0b7b65bbebf6ded7a11c1", "versionType": "git"}, {"status": "affected", "version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "bb420e8afc854d2a1caaa23a0c129839acfb7888", "versionType": "git"}, {"status": "affected", "version": "a1177825719ccef3f76ef39bbfd5ebb6087d53c7", "lessThan": "f9c1f248607d5546075d3f731e7607d5571f2b60", "versionType": "git"}], "programFiles": ["fs/ext4/super.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3.6"}, {"status": "unaffected", "version": "0", "lessThan": "3.6", "versionType": "semver"}, {"status": "unaffected", "version": "4.9.331", "versionType": "semver", "lessThanOrEqual": "4.9.*"}, {"status": "unaffected", "version": "4.14.296", "versionType": "semver", "lessThanOrEqual": "4.14.*"}, {"status": "unaffected", "version": "4.19.262", "versionType": "semver", "lessThanOrEqual": "4.19.*"}, {"status": "unaffected", "version": "5.4.220", "versionType": "semver", "lessThanOrEqual": "5.4.*"}, {"status": "unaffected", "version": "5.10.150", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.75", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "5.19.17", "versionType": "semver", "lessThanOrEqual": "5.19.*"}, {"status": "unaffected", "version": "6.0.3", "versionType": "semver", "lessThanOrEqual": "6.0.*"}, {"status": "unaffected", "version": "6.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/ext4/super.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/dc451578446afd03c0c21913993c08898a691435"}, {"url": "https://git.kernel.org/stable/c/f4b5ff0b794aa94afac7269c494550ca2f66511b"}, {"url": "https://git.kernel.org/stable/c/947264e00c46de19a016fd81218118c708fed2f3"}, {"url": "https://git.kernel.org/stable/c/3638aa1c7d87c0ca0aef23cf58cae2c48e7daca4"}, {"url": "https://git.kernel.org/stable/c/f34ab95162763cd7352f46df169296eec28b688d"}, {"url": "https://git.kernel.org/stable/c/533c60a0b97cee5daab376933f486207e6680fb7"}, {"url": "https://git.kernel.org/stable/c/4a657319cfabd6199fd0b7b65bbebf6ded7a11c1"}, {"url": "https://git.kernel.org/stable/c/bb420e8afc854d2a1caaa23a0c129839acfb7888"}, {"url": "https://git.kernel.org/stable/c/f9c1f248607d5546075d3f731e7607d5571f2b60"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix null-ptr-deref in ext4_write_info\n\nI caught a null-ptr-deref bug as follows:\n==================================================================\nKASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f]\nCPU: 1 PID: 1589 Comm: umount Not tainted 5.10.0-02219-dirty #339\nRIP: 0010:ext4_write_info+0x53/0x1b0\n[...]\nCall Trace:\n dquot_writeback_dquots+0x341/0x9a0\n ext4_sync_fs+0x19e/0x800\n __sync_filesystem+0x83/0x100\n sync_filesystem+0x89/0xf0\n generic_shutdown_super+0x79/0x3e0\n kill_block_super+0xa1/0x110\n deactivate_locked_super+0xac/0x130\n deactivate_super+0xb6/0xd0\n cleanup_mnt+0x289/0x400\n __cleanup_mnt+0x16/0x20\n task_work_run+0x11c/0x1c0\n exit_to_user_mode_prepare+0x203/0x210\n syscall_exit_to_user_mode+0x5b/0x3a0\n do_syscall_64+0x59/0x70\n entry_SYSCALL_64_after_hwframe+0x44/0xa9\n ==================================================================\n\nAbove issue may happen as follows:\n-------------------------------------\nexit_to_user_mode_prepare\n task_work_run\n __cleanup_mnt\n cleanup_mnt\n deactivate_super\n deactivate_locked_super\n kill_block_super\n generic_shutdown_super\n shrink_dcache_for_umount\n dentry = sb->s_root\n sb->s_root = NULL <--- Here set NULL\n sync_filesystem\n __sync_filesystem\n sb->s_op->sync_fs > ext4_sync_fs\n dquot_writeback_dquots\n sb->dq_op->write_info > ext4_write_info\n ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2)\n d_inode(sb->s_root)\n s_root->d_inode <--- Null pointer dereference\n\nTo solve this problem, we use ext4_journal_start_sb directly\nto avoid s_root being used."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.9.331", "versionStartIncluding": "3.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.14.296", "versionStartIncluding": "3.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.19.262", "versionStartIncluding": "3.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.220", "versionStartIncluding": "3.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.150", "versionStartIncluding": "3.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.75", "versionStartIncluding": "3.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.19.17", "versionStartIncluding": "3.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.0.3", "versionStartIncluding": "3.6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1", "versionStartIncluding": "3.6"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-12-23T13:28:53.932Z"}}}, "cveMetadata": {"cveId": "CVE-2022-50344", "state": "PUBLISHED", "dateUpdated": "2026-01-14T18:22:58.181Z", "dateReserved": "2025-09-16T16:03:27.881Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-09-16T16:11:23.345Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "F5B7C986-E6CA-41ED-A833-EA73FCF421D4", "versionEndExcluding": "4.9.331", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "1927ABC6-E0D2-478F-B103-B982A42D1158", "versionEndExcluding": "4.14.296", "versionStartIncluding": "4.10", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D6B62970-1FAD-4ED6-930A-23E26A8D2E08", "versionEndExcluding": "4.19.262", "versionStartIncluding": "4.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "125F7133-B3B7-4175-8CF3-FF0845483254", "versionEndExcluding": "5.4.220", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C495821C-2A71-4F09-BED8-6A6EB4C9BA27", "versionEndExcluding": "5.10.150", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6D945F46-F32F-4C09-8400-C3477E22A9FB", "versionEndExcluding": "5.15.75", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "19B4C3A4-E5C3-41DC-BB14-BE72858E7D35", "versionEndExcluding": "5.19.17", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5BCD8201-B847-4442-B894-70D430128DEF", "versionEndExcluding": "6.0.3", "versionStartIncluding": "6.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix null-ptr-deref in ext4_write_info\n\nI caught a null-ptr-deref bug as follows:\n==================================================================\nKASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f]\nCPU: 1 PID: 1589 Comm: umount Not tainted 5.10.0-02219-dirty #339\nRIP: 0010:ext4_write_info+0x53/0x1b0\n[...]\nCall Trace:\n dquot_writeback_dquots+0x341/0x9a0\n ext4_sync_fs+0x19e/0x800\n __sync_filesystem+0x83/0x100\n sync_filesystem+0x89/0xf0\n generic_shutdown_super+0x79/0x3e0\n kill_block_super+0xa1/0x110\n deactivate_locked_super+0xac/0x130\n deactivate_super+0xb6/0xd0\n cleanup_mnt+0x289/0x400\n __cleanup_mnt+0x16/0x20\n task_work_run+0x11c/0x1c0\n exit_to_user_mode_prepare+0x203/0x210\n syscall_exit_to_user_mode+0x5b/0x3a0\n do_syscall_64+0x59/0x70\n entry_SYSCALL_64_after_hwframe+0x44/0xa9\n ==================================================================\n\nAbove issue may happen as follows:\n-------------------------------------\nexit_to_user_mode_prepare\n task_work_run\n __cleanup_mnt\n cleanup_mnt\n deactivate_super\n deactivate_locked_super\n kill_block_super\n generic_shutdown_super\n shrink_dcache_for_umount\n dentry = sb->s_root\n sb->s_root = NULL <--- Here set NULL\n sync_filesystem\n __sync_filesystem\n sb->s_op->sync_fs > ext4_sync_fs\n dquot_writeback_dquots\n sb->dq_op->write_info > ext4_write_info\n ext4_journal_start(d_inode(sb->s_root), EXT4_HT_QUOTA, 2)\n d_inode(sb->s_root)\n s_root->d_inode <--- Null pointer dereference\n\nTo solve this problem, we use ext4_journal_start_sb directly\nto avoid s_root being used."}], "id": "CVE-2022-50344", "lastModified": "2026-01-14T19:16:05.073", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2025-09-16T17:15:34.070", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3638aa1c7d87c0ca0aef23cf58cae2c48e7daca4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4a657319cfabd6199fd0b7b65bbebf6ded7a11c1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/533c60a0b97cee5daab376933f486207e6680fb7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/947264e00c46de19a016fd81218118c708fed2f3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bb420e8afc854d2a1caaa23a0c129839acfb7888"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/dc451578446afd03c0c21913993c08898a691435"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f34ab95162763cd7352f46df169296eec28b688d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f4b5ff0b794aa94afac7269c494550ca2f66511b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f9c1f248607d5546075d3f731e7607d5571f2b60"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-476"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: ext4: fix null-ptr-deref in ext4_write_info", "id": "2395860", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2395860"}, "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"}, "details": ["No description is available for this CVE."], "name": "CVE-2022-50344", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"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", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-09-16T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50344\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50344\nhttps://lore.kernel.org/linux-cve-announce/2025091639-CVE-2022-50344-8893@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-09-17T10:04:26.049385+00:00", "updated": "2025-09-17T10:04:26.049419+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}