{"id":"CVE-2025-40198","revision":null,"records":[{"revision":"a505df1e30524ffcbe267d4f7480c088","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-40198","aliases":[],"title":"ext4: avoid potential buffer over-read in parse_apply_sb_mount_options()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\next4: avoid potential buffer over-read in parse_apply_sb_mount_options()\n\nUnlike other strings in the ext4 superblock, we rely on tune2fs to\nmake sure s_mount_opts is NUL terminated. Harden\nparse_apply_sb_mount_options() by treating s_mount_opts as a potential\n__nonstring.","state":0,"publishedAt":"2025-11-12T21:56:33.22+00:00","modifiedAt":"2026-10-15T22:02:40.274+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"fs/ext4/super.c\"\n ],\n \"versions\": [\n {\n \"version\": \"8b67f04ab9de5d8f3a71aef72bf02c995a506db5\",\n \"lessThan\": \"7bf46ff83a0ef11836e38ebd72cdc5107209342d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8b67f04ab9de5d8f3a71aef72bf02c995a506db5\",\n \"lessThan\": \"b2bac84fde28fb6a88817b8b761abda17a1d300b\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8b67f04ab9de5d8f3a71aef72bf02c995a506db5\",\n \"lessThan\": \"e651294218d2684302ee5ed95ccf381646f3e5b4\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8b67f04ab9de5d8f3a71aef72bf02c995a506db5\",\n \"lessThan\": \"01829af7656b56d83682b3491265d583d502e502\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8b67f04ab9de5d8f3a71aef72bf02c995a506db5\",\n \"lessThan\": \"2a0cf438320cdb783e0378570744c0ef0d83e934\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8b67f04ab9de5d8f3a71aef72bf02c995a506db5\",\n \"lessThan\": \"a6e94557cd05adc82fae0400f6e17745563e5412\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8b67f04ab9de5d8f3a71aef72bf02c995a506db5\",\n \"lessThan\": \"8ecb790ea8c3fc69e77bace57f14cf0d7c177bd8\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"fs/ext4/super.c\"\n ],\n \"versions\": [\n {\n \"version\": \"2.6.36\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"2.6.36\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.4.301\",\n \"lessThanOrEqual\": \"5.4.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.246\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.158\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.114\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.54\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.17.4\",\n \"lessThanOrEqual\": \"6.17.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/7bf46ff83a0ef11836e38ebd72cdc5107209342d","https://git.kernel.org/stable/c/b2bac84fde28fb6a88817b8b761abda17a1d300b","https://git.kernel.org/stable/c/e651294218d2684302ee5ed95ccf381646f3e5b4","https://git.kernel.org/stable/c/01829af7656b56d83682b3491265d583d502e502","https://git.kernel.org/stable/c/2a0cf438320cdb783e0378570744c0ef0d83e934","https://git.kernel.org/stable/c/a6e94557cd05adc82fae0400f6e17745563e5412","https://git.kernel.org/stable/c/8ecb790ea8c3fc69e77bace57f14cf0d7c177bd8"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-40198","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-40198","identifiers":["CVE-2025-40198"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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