{"api_version":"1","generated_at":"2026-08-17T11:25:10+00:00","cve":"CVE-2026-74567","urls":{"html":"https://cve.report/CVE-2026-74567","api":"https://cve.report/api/cve/CVE-2026-74567.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74567","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74567"},"summary":{"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":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 13:18:02","updated_at":"2026-08-17 06:19:54"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.1","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.1","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","data":{"baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/e9417d21a22ad2ec398e78fcf084b717ce92cf2f","name":"https://git.kernel.org/stable/c/e9417d21a22ad2ec398e78fcf084b717ce92cf2f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3a744838453fb9309ce5a5526d3252e211d60152","name":"https://git.kernel.org/stable/c/3a744838453fb9309ce5a5526d3252e211d60152","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/63918731f9ae25b5deb022f118e941e6dddfcef4","name":"https://git.kernel.org/stable/c/63918731f9ae25b5deb022f118e941e6dddfcef4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8dba33c1e779d0fb9a2acb31e354cf0fc0229111","name":"https://git.kernel.org/stable/c/8dba33c1e779d0fb9a2acb31e354cf0fc0229111","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d1933e03e8c74a018550c31a393b79c4d95bff40","name":"https://git.kernel.org/stable/c/d1933e03e8c74a018550c31a393b79c4d95bff40","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74567","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74567","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f771fde82051976a6fc0fd570f8b86de4a92124b d1933e03e8c74a018550c31a393b79c4d95bff40 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f771fde82051976a6fc0fd570f8b86de4a92124b 3a744838453fb9309ce5a5526d3252e211d60152 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f771fde82051976a6fc0fd570f8b86de4a92124b e9417d21a22ad2ec398e78fcf084b717ce92cf2f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f771fde82051976a6fc0fd570f8b86de4a92124b 8dba33c1e779d0fb9a2acb31e354cf0fc0229111 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected f771fde82051976a6fc0fd570f8b86de4a92124b 63918731f9ae25b5deb022f118e941e6dddfcef4 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.3","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.151 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.103 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.44 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.8 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":{"cve_year":"2026","cve_id":"74567","cve":"CVE-2026-74567","epss":"0.001560000","percentile":"0.052940000","score_date":"2026-08-16","updated_at":"2026-08-17 00:01:04"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["security/keys/keyring.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"d1933e03e8c74a018550c31a393b79c4d95bff40","status":"affected","version":"f771fde82051976a6fc0fd570f8b86de4a92124b","versionType":"git"},{"lessThan":"3a744838453fb9309ce5a5526d3252e211d60152","status":"affected","version":"f771fde82051976a6fc0fd570f8b86de4a92124b","versionType":"git"},{"lessThan":"e9417d21a22ad2ec398e78fcf084b717ce92cf2f","status":"affected","version":"f771fde82051976a6fc0fd570f8b86de4a92124b","versionType":"git"},{"lessThan":"8dba33c1e779d0fb9a2acb31e354cf0fc0229111","status":"affected","version":"f771fde82051976a6fc0fd570f8b86de4a92124b","versionType":"git"},{"lessThan":"63918731f9ae25b5deb022f118e941e6dddfcef4","status":"affected","version":"f771fde82051976a6fc0fd570f8b86de4a92124b","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["security/keys/keyring.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.3"},{"lessThan":"5.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.151","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.103","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.44","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.8","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":"6.6.151","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.103","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.44","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.8","versionStartIncluding":"5.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"5.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"metrics":[{"cvssV3_1":{"baseScore":7.1,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","version":"3.1"},"scenarios":[{"lang":"en","value":"AV:L - The flaw is reached only through local key-management syscalls (add_key, keyctl link/search) that walk the keyring assoc_array in security/keys/keyring.c; the keys subsystem has no network-facing handler or remote packet path.\nAC:L - An attacker fully controls both key descriptions and can offline-compute a same-type pair whose index collides through hash, x, type and domain_tag yet differs later, deterministically forcing description-level chunks without races or uncontrollable layout.\nPR:L - The fix commit and add_key path confirm any unprivileged local user can add crafted keys to their own session/user keyring (lookup_user_key with KEY_NEED_WRITE); no real-root capability or init-namespace privilege is required.\nUI:N - Exploitation is self-contained: the attacker issues add_key twice with crafted colliding descriptions into a writable keyring they own; no action by another user or administrator is required.\nS:U - The out-of-bounds slab read and any disclosed data remain within the host kernel's security authority; this is standard local kernel memory access, not a VM escape, IOMMU bypass, or sandbox boundary crossing.\nC:H - keyring_get_key_chunk() reads up to a word past the kmemdup(desc,desc_len+1) allocation when the offset includes level*sizeof(long), yielding an adjacent-heap read primitive that can disclose kernel pointers and other sensitive slab contents.\nI:N - This is a read-only out-of-bounds access with no kernel memory write, type confusion, or control-flow hijack; the bug discloses data but does not directly modify kernel or victim integrity.\nA:H - KASAN reports slab-out-of-bounds on trigger, and reading beyond the description allocation can fault at slab/page boundaries; the add_key insertion path is trivially repeatable for denial-of-service."}]}],"providerMetadata":{"dateUpdated":"2026-08-17T05:48:46.340Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/d1933e03e8c74a018550c31a393b79c4d95bff40"},{"url":"https://git.kernel.org/stable/c/3a744838453fb9309ce5a5526d3252e211d60152"},{"url":"https://git.kernel.org/stable/c/e9417d21a22ad2ec398e78fcf084b717ce92cf2f"},{"url":"https://git.kernel.org/stable/c/8dba33c1e779d0fb9a2acb31e354cf0fc0229111"},{"url":"https://git.kernel.org/stable/c/63918731f9ae25b5deb022f118e941e6dddfcef4"}],"title":"keys: fix out-of-bounds read in keyring_get_key_chunk()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74567","datePublished":"2026-08-15T12:28:08.240Z","dateReserved":"2026-08-15T05:44:03.917Z","dateUpdated":"2026-08-17T05:48:46.340Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 13:18:02","lastModifiedDate":"2026-08-17 06:19:54","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","baseScore":7.1,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.2}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74567","Ordinal":"1","Title":"keys: fix out-of-bounds read in keyring_get_key_chunk()","CVE":"CVE-2026-74567","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74567","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"keys: fix out-of-bounds read in keyring_get_key_chunk()"}]}}}