{"id":"CVE-2026-74567","revision":"53b467823079403d981f941f4c0b0cdd","records":[{"revision":"53b467823079403d981f941f4c0b0cdd","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-74567","aliases":[],"title":"keys: fix out-of-bounds read in keyring_get_key_chunk()","description":"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.","state":0,"publishedAt":"2026-08-15T12:28:08.24+00:00","modifiedAt":"2026-10-16T19:05:56.377+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"security/keys/keyring.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"f771fde82051976a6fc0fd570f8b86de4a92124b\",\n                            \"lessThan\": \"4c0c26f751e50d3027eacc4d7d0fabc31f1d7e6b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f771fde82051976a6fc0fd570f8b86de4a92124b\",\n                            \"lessThan\": \"79916f40d4ab1b4ae694d8c024fd179454bfe46e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f771fde82051976a6fc0fd570f8b86de4a92124b\",\n                            \"lessThan\": \"e5b01998cef8d7f613200230ccaadebe5de9135c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f771fde82051976a6fc0fd570f8b86de4a92124b\",\n                            \"lessThan\": \"d1933e03e8c74a018550c31a393b79c4d95bff40\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f771fde82051976a6fc0fd570f8b86de4a92124b\",\n                            \"lessThan\": \"3a744838453fb9309ce5a5526d3252e211d60152\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f771fde82051976a6fc0fd570f8b86de4a92124b\",\n                            \"lessThan\": \"e9417d21a22ad2ec398e78fcf084b717ce92cf2f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f771fde82051976a6fc0fd570f8b86de4a92124b\",\n                            \"lessThan\": \"8dba33c1e779d0fb9a2acb31e354cf0fc0229111\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"f771fde82051976a6fc0fd570f8b86de4a92124b\",\n                            \"lessThan\": \"63918731f9ae25b5deb022f118e941e6dddfcef4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"security/keys/keyring.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.3\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.3\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.265\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.216\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.183\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.151\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.103\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.44\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.8\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","score":7.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/4c0c26f751e50d3027eacc4d7d0fabc31f1d7e6b","https://git.kernel.org/stable/c/79916f40d4ab1b4ae694d8c024fd179454bfe46e","https://git.kernel.org/stable/c/e5b01998cef8d7f613200230ccaadebe5de9135c","https://git.kernel.org/stable/c/d1933e03e8c74a018550c31a393b79c4d95bff40","https://git.kernel.org/stable/c/3a744838453fb9309ce5a5526d3252e211d60152","https://git.kernel.org/stable/c/e9417d21a22ad2ec398e78fcf084b717ce92cf2f","https://git.kernel.org/stable/c/8dba33c1e779d0fb9a2acb31e354cf0fc0229111","https://git.kernel.org/stable/c/63918731f9ae25b5deb022f118e941e6dddfcef4"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74567","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-74567","identifiers":["CVE-2026-74567"]},"retained":false,"historicalAffected":[]}],"coverage":[]}