{"id":"CVE-2022-49408","state":"PUBLISHED","title":"ext4: fix memory leak in parse_apply_sb_mount_options()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix memory leak in parse_apply_sb_mount_options()\n\nIf processing the on-disk mount options fails after any memory was\nallocated in the ext4_fs_context, e.g. s_qf_names, then this memory is\nleaked.  Fix this by calling ext4_fc_free() instead of kfree() directly.\n\nReproducer:\n\n    mkfs.ext4 -F /dev/vdc\n    tune2fs /dev/vdc -E mount_opts=usrjquota=file\n    echo clear > /sys/kernel/debug/kmemleak\n    mount /dev/vdc /vdc\n    echo scan > /sys/kernel/debug/kmemleak\n    sleep 5\n    echo scan > /sys/kernel/debug/kmemleak\n    cat /sys/kernel/debug/kmemleak","publishedAt":"2025-02-26T02:12:32.048Z","updatedAt":"2026-05-11T18:59:11.006Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7edfd85b1ffd36593011dec96ab395912a340418","status":"affected","lessThan":"9ea3e6168948189cec31d0678d2b55b395f88491","versionType":"git"},{"version":"7edfd85b1ffd36593011dec96ab395912a340418","status":"affected","lessThan":"f92ded66e9d0aa20b883a2a5183973abc8f41815","versionType":"git"},{"version":"7edfd85b1ffd36593011dec96ab395912a340418","status":"affected","lessThan":"c069db76ed7b681c69159f44be96d2137e9ca989","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/super.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.17","versionType":"semver"},{"version":"5.17.14","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18.3","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/super.c"]}],"references":["https://git.kernel.org/stable/c/9ea3e6168948189cec31d0678d2b55b395f88491","https://git.kernel.org/stable/c/f92ded66e9d0aa20b883a2a5183973abc8f41815","https://git.kernel.org/stable/c/c069db76ed7b681c69159f44be96d2137e9ca989"],"weaknesses":["CWE-401"],"ingestedAt":"2026-10-29T20:05:26.763Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2022/49xxx/CVE-2022-49408.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49408","state":"PUBLISHED","datePublished":"2025-02-26T02:12:32.048Z","dateUpdated":"2026-05-11T18:59:11.006Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-02-26T02:08:31.567Z"},"containers":{"cna":{"title":"ext4: fix memory leak in parse_apply_sb_mount_options()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: fix memory leak in parse_apply_sb_mount_options()\n\nIf processing the on-disk mount options fails after any memory was\nallocated in the ext4_fs_context, e.g. s_qf_names, then this memory is\nleaked.  Fix this by calling ext4_fc_free() instead of kfree() directly.\n\nReproducer:\n\n    mkfs.ext4 -F /dev/vdc\n    tune2fs /dev/vdc -E mount_opts=usrjquota=file\n    echo clear > /sys/kernel/debug/kmemleak\n    mount /dev/vdc /vdc\n    echo scan > /sys/kernel/debug/kmemleak\n    sleep 5\n    echo scan > /sys/kernel/debug/kmemleak\n    cat /sys/kernel/debug/kmemleak"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7edfd85b1ffd36593011dec96ab395912a340418","status":"affected","lessThan":"9ea3e6168948189cec31d0678d2b55b395f88491","versionType":"git"},{"version":"7edfd85b1ffd36593011dec96ab395912a340418","status":"affected","lessThan":"f92ded66e9d0aa20b883a2a5183973abc8f41815","versionType":"git"},{"version":"7edfd85b1ffd36593011dec96ab395912a340418","status":"affected","lessThan":"c069db76ed7b681c69159f44be96d2137e9ca989","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/super.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.17","versionType":"semver"},{"version":"5.17.14","status":"unaffected","lessThanOrEqual":"5.17.*","versionType":"semver"},{"version":"5.18.3","status":"unaffected","lessThanOrEqual":"5.18.*","versionType":"semver"},{"version":"5.19","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/ext4/super.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/9ea3e6168948189cec31d0678d2b55b395f88491"},{"url":"https://git.kernel.org/stable/c/f92ded66e9d0aa20b883a2a5183973abc8f41815"},{"url":"https://git.kernel.org/stable/c/c069db76ed7b681c69159f44be96d2137e9ca989"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T18:59:11.006Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"5.17.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"5.18.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"5.19"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"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-2022-49408","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2025-10-01T20:08:49.791211Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-401","lang":"en","type":"CWE","description":"CWE-401 Missing Release of Memory after Effective Lifetime"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-01T20:17:06.649Z"}}]}}}