{"id":"CVE-2026-74566","title":"keys: make keyring key-chunk byte order agree with keyring_diff_objects()","summary":"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…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= f771fde82051976a6fc0fd570f8b86de4a92124b < 414bcf37d81ce9b3823aabc06b04c97fdcbe489b","Linux >= f771fde82051976a6fc0fd570f8b86de4a92124b < abe43c661efb753d5ee35ad8ace4bbb16fa9afd0","Linux >= f771fde82051976a6fc0fd570f8b86de4a92124b < f81920917074e3c4ad4fba06fe8c56738d010606","Linux >= f771fde82051976a6fc0fd570f8b86de4a92124b < bd0f976ef89dce6db458bf75bc2cf51127becc41","Linux >= f771fde82051976a6fc0fd570f8b86de4a92124b < 7269df3e7fcfa308e6a456305162f7788747bdbd","Linux >= f771fde82051976a6fc0fd570f8b86de4a92124b < 3d9f16c0b643ceac305526b2e2fe25c2c6166926","Linux >= f771fde82051976a6fc0fd570f8b86de4a92124b < 7e5397a3fed0dee7779bd084bec3c0584db3c930","Linux >= f771fde82051976a6fc0fd570f8b86de4a92124b < 58565eef0f8d861aae92abfb7658458d661cee17","Linux 5.3"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:59:38.524591Z"},"published":"2026-08-15","updated":"2026-11-06","sourceUpdated":"2026-11-06T17:05:48.395Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74566","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"}],"tags":["cve.org"],"epss":0.00165,"epssPercentile":0.05701,"ingestedAt":"2026-11-06T18:00:12.547Z","slug":"CVE-2026-74566","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= f771fde82051976a6fc0fd570f8b86de4a92124b < 414bcf37d81ce9b3823aabc06b04c97fdcbe489b`\n- `Linux >= f771fde82051976a6fc0fd570f8b86de4a92124b < abe43c661efb753d5ee35ad8ace4bbb16fa9afd0`\n- `Linux >= f771fde82051976a6fc0fd570f8b86de4a92124b < f81920917074e3c4ad4fba06fe8c56738d010606`\n- `Linux >= f771fde82051976a6fc0fd570f8b86de4a92124b < bd0f976ef89dce6db458bf75bc2cf51127becc41`\n- `Linux >= f771fde82051976a6fc0fd570f8b86de4a92124b < 7269df3e7fcfa308e6a456305162f7788747bdbd`\n- `Linux >= f771fde82051976a6fc0fd570f8b86de4a92124b < 3d9f16c0b643ceac305526b2e2fe25c2c6166926`\n- `Linux >= f771fde82051976a6fc0fd570f8b86de4a92124b < 7e5397a3fed0dee7779bd084bec3c0584db3c930`\n- `Linux >= f771fde82051976a6fc0fd570f8b86de4a92124b < 58565eef0f8d861aae92abfb7658458d661cee17`\n- `Linux 5.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}