{"id":"CVE-2026-74567","summary":"keys: fix out-of-bounds read in keyring_get_key_chunk()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nkeys: fix out-of-bounds read in keyring_get_key_chunk()\n\nFor description-level chunks keyring_get_key_chunk() advances the read\npointer by level * sizeof(long) past the inline prefix but only\nbounds-checks the prefix, so a long enough key description is read past\nits kmemdup(desc, desc_len + 1) allocation.  Compute the full byte\noffset and bounds-check the description against it before reading.\n\nThe walk only reaches a description-level chunk when two keys collide\nthrough the hash, x, type and domain_tag chunks, so this is reached from\nan unprivileged add_key(2) with a crafted pair of same-type keys whose\nindex hashes collide; KASAN reports a slab-out-of-bounds read.","modified":"2026-08-18T03:56:51.676760689Z","published":"2026-08-15T12:28:08.240Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74567.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/3a744838453fb9309ce5a5526d3252e211d60152"},{"type":"WEB","url":"https://git.kernel.org/stable/c/63918731f9ae25b5deb022f118e941e6dddfcef4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8dba33c1e779d0fb9a2acb31e354cf0fc0229111"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d1933e03e8c74a018550c31a393b79c4d95bff40"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e9417d21a22ad2ec398e78fcf084b717ce92cf2f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74567.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74567"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f771fde82051976a6fc0fd570f8b86de4a92124b"},{"fixed":"d1933e03e8c74a018550c31a393b79c4d95bff40"},{"fixed":"3a744838453fb9309ce5a5526d3252e211d60152"},{"fixed":"e9417d21a22ad2ec398e78fcf084b717ce92cf2f"},{"fixed":"8dba33c1e779d0fb9a2acb31e354cf0fc0229111"},{"fixed":"63918731f9ae25b5deb022f118e941e6dddfcef4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74567.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.3.0"},{"fixed":"6.6.151"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.103"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.44"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74567.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"}]}