{"id":"CVE-2026-46303","revision":null,"records":[{"revision":"078f3f5195b449ffb3416cfba1bd1f05","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-46303","aliases":[],"title":"isofs: validate Rock Ridge CE continuation extent against volume size","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nisofs: validate Rock Ridge CE continuation extent against volume size\n\nrock_continue() reads rs->cont_extent verbatim from the Rock Ridge CE\nrecord and passes it to sb_bread() without checking that the block\nnumber is within the mounted ISO 9660 volume. commit e595447e177b\n(\"[PATCH] rock.c: handle corrupted directories\") added cont_offset\nand cont_size rejection for the CE continuation but did not validate\nthe extent block number itself. commit f54e18f1b831 (\"isofs: Fix\ninfinite looping over CE entries\") later capped the CE chain length\nat RR_MAX_CE_ENTRIES = 32 but again left the block number unchecked.\n\nWith a crafted ISO mounted via udisks2 (desktop optical auto-mount)\nor via CAP_SYS_ADMIN mount, rs->cont_extent can therefore point at\nan out-of-range block or at blocks belonging to an adjacent\nfilesystem on the same block device. sb_bread() on an out-of-range\nblock returns NULL cleanly via the block layer EIO path, so there\nis no memory-safety violation. For in-range reads of adjacent-\nfilesystem data, the CE buffer is parsed as Rock Ridge records and\nonly the text of SL sub-records reaches userspace through\nreadlink(), which makes the info-leak channel narrow and difficult\nto exploit; still, rejecting the malformed CE outright matches the\nrejection shape already present in the same function for\ncont_offset and cont_size.\n\nAdd an ISOFS_SB(sb)->s_nzones bounds check to rock_continue() next\nto the existing offset/size rejection, printing the same\ncorrupted-directory-entry notice.","state":0,"publishedAt":"2026-06-08T15:46:30.642+00:00","modifiedAt":"2026-10-15T01:21:29.328+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/isofs/rock.c\"\n ],\n \"versions\": [\n {\n \"version\": \"f54e18f1b831c92f6512d2eedb224cd63d607d3d\",\n \"lessThan\": \"8356fb821016797f5677cbeee5ddc0d32a95b4be\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f54e18f1b831c92f6512d2eedb224cd63d607d3d\",\n \"lessThan\": \"d582e12378bc1637f337622feef762f53c43fd57\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f54e18f1b831c92f6512d2eedb224cd63d607d3d\",\n \"lessThan\": \"bf1bc673c587f5ef7e9c09b94aea7c5a7847d4d9\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f54e18f1b831c92f6512d2eedb224cd63d607d3d\",\n \"lessThan\": \"c9b37c8b73f6368e4750e5ccb0632c380b43c6e5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f54e18f1b831c92f6512d2eedb224cd63d607d3d\",\n \"lessThan\": \"22b36fa081f38ab397c7697f9d539211b51a0cfc\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f54e18f1b831c92f6512d2eedb224cd63d607d3d\",\n \"lessThan\": \"e69da8eeab74b4f4505024c38a17bce060fe7df8\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f54e18f1b831c92f6512d2eedb224cd63d607d3d\",\n \"lessThan\": \"ef048470c90bc8c1b8318bb2ce329da9ef64b9fe\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"f54e18f1b831c92f6512d2eedb224cd63d607d3d\",\n \"lessThan\": \"a36d990f591320e9dd379ab30063ebfe91d47e1f\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"08313e26e06d4aa9ce1cbba1a8e359e9cab9ad56\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"212c4d33ca83e2144064fe9c2911607fbed5386f\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"96e44adce250199ec9b2b928be66365779ff1b59\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1fe5620fcd6c2f0a4a927ee10c8e53196da392f3\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"fbce0d7dc8965c9fb8d411862040239d4a768c71\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"8190393a88f2b0321263a54f2a9eb5a2aa43be7e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"486aa789eadcf44ed87f972b209299c516454693\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"b6d20edb6e7cedb4eedb9e0193d20dd488ebae84\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"2.6.32.66\",\n \"lessThan\": \"2.6.33\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"3.2.67\",\n \"lessThan\": \"3.3\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"3.4.107\",\n \"lessThan\": \"3.5\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"3.10.64\",\n \"lessThan\": \"3.11\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"3.12.36\",\n \"lessThan\": \"3.13\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"3.14.28\",\n \"lessThan\": \"3.15\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"3.17.8\",\n \"lessThan\": \"3.18\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"3.18.2\",\n \"lessThan\": \"3.19\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\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/isofs/rock.c\"\n ],\n \"versions\": [\n {\n \"version\": \"3.19\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"3.19\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.258\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.209\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.175\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.140\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.88\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.30\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0.7\",\n \"lessThanOrEqual\": \"7.0.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","score":8.2,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/8356fb821016797f5677cbeee5ddc0d32a95b4be","https://git.kernel.org/stable/c/d582e12378bc1637f337622feef762f53c43fd57","https://git.kernel.org/stable/c/bf1bc673c587f5ef7e9c09b94aea7c5a7847d4d9","https://git.kernel.org/stable/c/c9b37c8b73f6368e4750e5ccb0632c380b43c6e5","https://git.kernel.org/stable/c/22b36fa081f38ab397c7697f9d539211b51a0cfc","https://git.kernel.org/stable/c/e69da8eeab74b4f4505024c38a17bce060fe7df8","https://git.kernel.org/stable/c/ef048470c90bc8c1b8318bb2ce329da9ef64b9fe","https://git.kernel.org/stable/c/a36d990f591320e9dd379ab30063ebfe91d47e1f"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-46303","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-46303","identifiers":["CVE-2026-46303"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-09T18:04:49.9033842+00:00","complete":true,"records":1772,"lastAttemptAt":"2026-11-09T18:04:49.9033842+00:00","lastSuccessAt":"2026-11-09T18:04:51.4246251+00:00","error":null,"lastVerifiedAt":"2026-11-09T18:04:51.4246256+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-24e6fde7b744113daefb8f6135035fb8a5c69c9617c9c0d40574a0376532ffd3-da82b7f3c08c0a1c809bacbfac0a567c645c18f0205247304bfc7e4ee4c02653","complete":true,"records":421491,"lastAttemptAt":"2026-11-09T18:02:17.7227212+00:00","lastSuccessAt":"2026-11-09T18:02:17.6122603+00:00","error":null,"lastVerifiedAt":"2026-11-09T18:02:17.7227212+00:00","snapshotPublishedAt":"2026-11-09T17:19:01+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-83353c603c8b44ff880a9955a737c288","complete":false,"records":13655,"lastAttemptAt":"2026-11-09T18:17:25.0500848+00:00","lastSuccessAt":"2026-11-09T18:17:25.037+00:00","error":"6 identifier lookups failed; latest failures include HTTP 403. Other identifiers were checked independently.","lastVerifiedAt":"2026-11-09T18:17:25.037+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13294,"expectedIdentifiers":13707,"failedIdentifiers":6},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-09T18:04:49.9033842+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T18:04:49.9033842+00:00","lastSuccessAt":"2026-11-09T18:04:51.425345+00:00","error":null,"lastVerifiedAt":"2026-11-09T18:04:51.425345+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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