{"api_version":"1","generated_at":"2026-08-22T21:53:01+00:00","cve":"CVE-2026-74671","urls":{"html":"https://cve.report/CVE-2026-74671","api":"https://cve.report/api/cve/CVE-2026-74671.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74671","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74671"},"summary":{"title":"ima: fix out-of-bounds read in xattr_verify()","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:41","updated_at":"2026-08-22 16:16:41"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/5ff232d31106f45ac87c3b64e1d35a0667777797","name":"https://git.kernel.org/stable/c/5ff232d31106f45ac87c3b64e1d35a0667777797","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b6cb134707a2127d90a58d69dd818679cae8033c","name":"https://git.kernel.org/stable/c/b6cb134707a2127d90a58d69dd818679cae8033c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/caeb105c15ea2431fa8da7ecfa242d0c68272426","name":"https://git.kernel.org/stable/c/caeb105c15ea2431fa8da7ecfa242d0c68272426","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a784b4732ac7e51862b9b210c2d8b2ab9e83568c","name":"https://git.kernel.org/stable/c/a784b4732ac7e51862b9b210c2d8b2ab9e83568c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7e515b6c9aab452a4f0734bd7208e4e780e164ca","name":"https://git.kernel.org/stable/c/7e515b6c9aab452a4f0734bd7208e4e780e164ca","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d823b5f4557083d1dd92096f796a78a2b1b06d10","name":"https://git.kernel.org/stable/c/d823b5f4557083d1dd92096f796a78a2b1b06d10","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dd04114af0d451091f7b8cbd26d9e37d011e9131","name":"https://git.kernel.org/stable/c/dd04114af0d451091f7b8cbd26d9e37d011e9131","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/27f3924061592d0ef6b04e16f48754b6cb6adf27","name":"https://git.kernel.org/stable/c/27f3924061592d0ef6b04e16f48754b6cb6adf27","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74671","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74671","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3ea7a56067e663278470c04fd655adf809e72d4d d823b5f4557083d1dd92096f796a78a2b1b06d10 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3ea7a56067e663278470c04fd655adf809e72d4d caeb105c15ea2431fa8da7ecfa242d0c68272426 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3ea7a56067e663278470c04fd655adf809e72d4d a784b4732ac7e51862b9b210c2d8b2ab9e83568c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3ea7a56067e663278470c04fd655adf809e72d4d b6cb134707a2127d90a58d69dd818679cae8033c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.216 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.183 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.152 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.104 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.45 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.9 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["security/integrity/ima/ima_appraise.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"d823b5f4557083d1dd92096f796a78a2b1b06d10","status":"affected","version":"3ea7a56067e663278470c04fd655adf809e72d4d","versionType":"git"},{"lessThan":"caeb105c15ea2431fa8da7ecfa242d0c68272426","status":"affected","version":"3ea7a56067e663278470c04fd655adf809e72d4d","versionType":"git"},{"lessThan":"a784b4732ac7e51862b9b210c2d8b2ab9e83568c","status":"affected","version":"3ea7a56067e663278470c04fd655adf809e72d4d","versionType":"git"},{"lessThan":"b6cb134707a2127d90a58d69dd818679cae8033c","status":"affected","version":"3ea7a56067e663278470c04fd655adf809e72d4d","versionType":"git"},{"lessThan":"7e515b6c9aab452a4f0734bd7208e4e780e164ca","status":"affected","version":"3ea7a56067e663278470c04fd655adf809e72d4d","versionType":"git"},{"lessThan":"27f3924061592d0ef6b04e16f48754b6cb6adf27","status":"affected","version":"3ea7a56067e663278470c04fd655adf809e72d4d","versionType":"git"},{"lessThan":"dd04114af0d451091f7b8cbd26d9e37d011e9131","status":"affected","version":"3ea7a56067e663278470c04fd655adf809e72d4d","versionType":"git"},{"lessThan":"5ff232d31106f45ac87c3b64e1d35a0667777797","status":"affected","version":"3ea7a56067e663278470c04fd655adf809e72d4d","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["security/integrity/ima/ima_appraise.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.13"},{"lessThan":"3.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.265","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.216","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.152","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.104","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.45","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.9","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.265","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.216","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.183","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.152","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.104","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.45","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"3.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"3.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-08-22T15:32:41.480Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74671","datePublished":"2026-08-22T15:32:41.480Z","dateReserved":"2026-08-15T05:44:03.925Z","dateUpdated":"2026-08-22T15:32:41.480Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:41","lastModifiedDate":"2026-08-22 16:16:41","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74671","Ordinal":"1","Title":"ima: fix out-of-bounds read in xattr_verify()","CVE":"CVE-2026-74671","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74671","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"ima: fix out-of-bounds read in xattr_verify()"}]}}}