{"id":"CVE-2026-74566","state":"PUBLISHED","title":"keys: make keyring key-chunk byte order agree with keyring_diff_objects()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nkeys: make keyring key-chunk byte order agree with keyring_diff_objects()\n\nkeyring_get_key_chunk() loads description bytes into the index chunk low\naddress first, while keyring_diff_objects() numbers the first differing\nbit from the low end and folds the absolute byte index into the level\nwithout removing the inline-prefix offset the level already carries.\nThe two disagree on byte order and bit position, so the array can be\ntold two keys first differ at a bit that does not differ in the chunk\nthe walker uses, letting crafted descriptions collide into one node.\n\nLoad the chunk in the order keyring_diff_objects() assumes and drop the\ninline-prefix length when folding the byte index into the level.  This\nonly changes the in-memory ordering used to place keys within a keyring;\nadd, search and read of non-colliding keys are unaffected.","publishedAt":"2026-08-15T12:28:07.628Z","updatedAt":"2026-08-19T16:39:06.890Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f771fde82051976a6fc0fd570f8b86de4a92124b","status":"affected","lessThan":"414bcf37d81ce9b3823aabc06b04c97fdcbe489b","versionType":"git"},{"version":"f771fde82051976a6fc0fd570f8b86de4a92124b","status":"affected","lessThan":"abe43c661efb753d5ee35ad8ace4bbb16fa9afd0","versionType":"git"},{"version":"f771fde82051976a6fc0fd570f8b86de4a92124b","status":"affected","lessThan":"f81920917074e3c4ad4fba06fe8c56738d010606","versionType":"git"},{"version":"f771fde82051976a6fc0fd570f8b86de4a92124b","status":"affected","lessThan":"bd0f976ef89dce6db458bf75bc2cf51127becc41","versionType":"git"},{"version":"f771fde82051976a6fc0fd570f8b86de4a92124b","status":"affected","lessThan":"7269df3e7fcfa308e6a456305162f7788747bdbd","versionType":"git"},{"version":"f771fde82051976a6fc0fd570f8b86de4a92124b","status":"affected","lessThan":"3d9f16c0b643ceac305526b2e2fe25c2c6166926","versionType":"git"},{"version":"f771fde82051976a6fc0fd570f8b86de4a92124b","status":"affected","lessThan":"7e5397a3fed0dee7779bd084bec3c0584db3c930","versionType":"git"},{"version":"f771fde82051976a6fc0fd570f8b86de4a92124b","status":"affected","lessThan":"58565eef0f8d861aae92abfb7658458d661cee17","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/keys/keyring.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.3","versionType":"semver"},{"version":"5.10.265","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.151","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.103","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/keys/keyring.c"]}],"references":["https://git.kernel.org/stable/c/414bcf37d81ce9b3823aabc06b04c97fdcbe489b","https://git.kernel.org/stable/c/abe43c661efb753d5ee35ad8ace4bbb16fa9afd0","https://git.kernel.org/stable/c/f81920917074e3c4ad4fba06fe8c56738d010606","https://git.kernel.org/stable/c/bd0f976ef89dce6db458bf75bc2cf51127becc41","https://git.kernel.org/stable/c/7269df3e7fcfa308e6a456305162f7788747bdbd","https://git.kernel.org/stable/c/3d9f16c0b643ceac305526b2e2fe25c2c6166926","https://git.kernel.org/stable/c/7e5397a3fed0dee7779bd084bec3c0584db3c930","https://git.kernel.org/stable/c/58565eef0f8d861aae92abfb7658458d661cee17"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/74xxx/CVE-2026-74566.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74566","state":"PUBLISHED","datePublished":"2026-08-15T12:28:07.628Z","dateUpdated":"2026-08-19T16:39:06.890Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-15T05:44:03.917Z"},"containers":{"cna":{"title":"keys: make keyring key-chunk byte order agree with keyring_diff_objects()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nkeys: make keyring key-chunk byte order agree with keyring_diff_objects()\n\nkeyring_get_key_chunk() loads description bytes into the index chunk low\naddress first, while keyring_diff_objects() numbers the first differing\nbit from the low end and folds the absolute byte index into the level\nwithout removing the inline-prefix offset the level already carries.\nThe two disagree on byte order and bit position, so the array can be\ntold two keys first differ at a bit that does not differ in the chunk\nthe walker uses, letting crafted descriptions collide into one node.\n\nLoad the chunk in the order keyring_diff_objects() assumes and drop the\ninline-prefix length when folding the byte index into the level.  This\nonly changes the in-memory ordering used to place keys within a keyring;\nadd, search and read of non-colliding keys are unaffected."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"f771fde82051976a6fc0fd570f8b86de4a92124b","status":"affected","lessThan":"414bcf37d81ce9b3823aabc06b04c97fdcbe489b","versionType":"git"},{"version":"f771fde82051976a6fc0fd570f8b86de4a92124b","status":"affected","lessThan":"abe43c661efb753d5ee35ad8ace4bbb16fa9afd0","versionType":"git"},{"version":"f771fde82051976a6fc0fd570f8b86de4a92124b","status":"affected","lessThan":"f81920917074e3c4ad4fba06fe8c56738d010606","versionType":"git"},{"version":"f771fde82051976a6fc0fd570f8b86de4a92124b","status":"affected","lessThan":"bd0f976ef89dce6db458bf75bc2cf51127becc41","versionType":"git"},{"version":"f771fde82051976a6fc0fd570f8b86de4a92124b","status":"affected","lessThan":"7269df3e7fcfa308e6a456305162f7788747bdbd","versionType":"git"},{"version":"f771fde82051976a6fc0fd570f8b86de4a92124b","status":"affected","lessThan":"3d9f16c0b643ceac305526b2e2fe25c2c6166926","versionType":"git"},{"version":"f771fde82051976a6fc0fd570f8b86de4a92124b","status":"affected","lessThan":"7e5397a3fed0dee7779bd084bec3c0584db3c930","versionType":"git"},{"version":"f771fde82051976a6fc0fd570f8b86de4a92124b","status":"affected","lessThan":"58565eef0f8d861aae92abfb7658458d661cee17","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/keys/keyring.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.3","versionType":"semver"},{"version":"5.10.265","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.151","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.103","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.44","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.8","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["security/keys/keyring.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/414bcf37d81ce9b3823aabc06b04c97fdcbe489b"},{"url":"https://git.kernel.org/stable/c/abe43c661efb753d5ee35ad8ace4bbb16fa9afd0"},{"url":"https://git.kernel.org/stable/c/f81920917074e3c4ad4fba06fe8c56738d010606"},{"url":"https://git.kernel.org/stable/c/bd0f976ef89dce6db458bf75bc2cf51127becc41"},{"url":"https://git.kernel.org/stable/c/7269df3e7fcfa308e6a456305162f7788747bdbd"},{"url":"https://git.kernel.org/stable/c/3d9f16c0b643ceac305526b2e2fe25c2c6166926"},{"url":"https://git.kernel.org/stable/c/7e5397a3fed0dee7779bd084bec3c0584db3c930"},{"url":"https://git.kernel.org/stable/c/58565eef0f8d861aae92abfb7658458d661cee17"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-19T16:39:06.890Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"5.10.265"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.6.151"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.12.103"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.18.44"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"7.1.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}