{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-74671", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.925Z", "datePublished": "2026-08-22T15:32:41.480Z", "dateUpdated": "2026-08-22T15:32:41.480Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-22T15:32:41.480Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nima: fix out-of-bounds read in xattr_verify()\n\nThe digest-length check in xattr_verify() mixes int and size_t:\n\n\tif (xattr_len - sizeof(xattr_value->type) - hash_start >=\n\t\t\tiint->ima_hash->length)\n\nsizeof() yields size_t, so the usual arithmetic conversions promote\nthe whole left-hand side to unsigned 64-bit before the subtraction\nruns. For a truncated xattr this underflows instead of going negative:\na 1-byte IMA_XATTR_DIGEST_NG xattr (xattr_len == 1, hash_start == 1)\nturns \"1 - 1 - 1\" into SIZE_MAX, which is trivially >= ima_hash->length.\nThe check then passes and the following memcmp() reads\niint->ima_hash->length bytes starting past the end of the buffer\nvfs_getxattr_alloc() allocated for it.\n\nNothing upstream clamps xattr_len back into a safe range first:\nima_get_hash_algo() only special-cases xattr_len < 2 to pick a default\nalgorithm, and evm_verifyxattr() returns INTEGRITY_UNKNOWN rather than\nfailing when no HMAC key is loaded, so a truncated security.ima value\nreaches the length check as-is.\n\nRewrite the comparison so every operand stays a signed int and no\nimplicit conversion to size_t can occur." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "security/integrity/ima/ima_appraise.c" ], "versions": [ { "version": "3ea7a56067e663278470c04fd655adf809e72d4d", "lessThan": "d823b5f4557083d1dd92096f796a78a2b1b06d10", "status": "affected", "versionType": "git" }, { "version": "3ea7a56067e663278470c04fd655adf809e72d4d", "lessThan": "caeb105c15ea2431fa8da7ecfa242d0c68272426", "status": "affected", "versionType": "git" }, { "version": "3ea7a56067e663278470c04fd655adf809e72d4d", "lessThan": "a784b4732ac7e51862b9b210c2d8b2ab9e83568c", "status": "affected", "versionType": "git" }, { "version": "3ea7a56067e663278470c04fd655adf809e72d4d", "lessThan": "b6cb134707a2127d90a58d69dd818679cae8033c", "status": "affected", "versionType": "git" }, { "version": "3ea7a56067e663278470c04fd655adf809e72d4d", "lessThan": "7e515b6c9aab452a4f0734bd7208e4e780e164ca", "status": "affected", "versionType": "git" }, { "version": "3ea7a56067e663278470c04fd655adf809e72d4d", "lessThan": "27f3924061592d0ef6b04e16f48754b6cb6adf27", "status": "affected", "versionType": "git" }, { "version": "3ea7a56067e663278470c04fd655adf809e72d4d", "lessThan": "dd04114af0d451091f7b8cbd26d9e37d011e9131", "status": "affected", "versionType": "git" }, { "version": "3ea7a56067e663278470c04fd655adf809e72d4d", "lessThan": "5ff232d31106f45ac87c3b64e1d35a0667777797", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "security/integrity/ima/ima_appraise.c" ], "versions": [ { "version": "3.13", "status": "affected" }, { "version": "0", "lessThan": "3.13", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.265", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.152", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.104", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.45", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.9", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "3.13", "versionEndExcluding": "5.10.265" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "5.15.216" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.1.183" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.6.152" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.12.104" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "6.18.45" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "7.1.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.13", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/d823b5f4557083d1dd92096f796a78a2b1b06d10" }, { "url": "https://git.kernel.org/stable/c/caeb105c15ea2431fa8da7ecfa242d0c68272426" }, { "url": "https://git.kernel.org/stable/c/a784b4732ac7e51862b9b210c2d8b2ab9e83568c" }, { "url": "https://git.kernel.org/stable/c/b6cb134707a2127d90a58d69dd818679cae8033c" }, { "url": "https://git.kernel.org/stable/c/7e515b6c9aab452a4f0734bd7208e4e780e164ca" }, { "url": "https://git.kernel.org/stable/c/27f3924061592d0ef6b04e16f48754b6cb6adf27" }, { "url": "https://git.kernel.org/stable/c/dd04114af0d451091f7b8cbd26d9e37d011e9131" }, { "url": "https://git.kernel.org/stable/c/5ff232d31106f45ac87c3b64e1d35a0667777797" } ], "title": "ima: fix out-of-bounds read in xattr_verify()", "x_generator": { "engine": "bippy-1.2.0" } } } }