{"schema":"threatline.record/2","record":{"id":"CVE-2026-97496","aliases":[],"summary":"drm/amdkfd: Fix OOB memory exposure in get_wave_state()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Fix OOB memory exposure in get_wave_state()\n\nThe get_wave_state() function for v9 trusts cp_hqd_cntl_stack_size and\ncp_hqd_cntl_stack_offset values read directly from the MQD, which are\nwritten by GPU microcode and fully attacker-controlled on the\nCRIU-restore path (via AMDKFD_IOC_RESTORE_PROCESS with H3).\n\nthis leads to an unbounded copy_to_user() that can leak adjacent\nGTT/kernel memory. If offset > size, integer underflow produces a ~4 GiB\nread length, if size is set to 1 MiB against a 4 KiB allocation, we leak\n1 MiB of adjacent kernel memory (other queues' MQDs, ring buffers, KASLR\npointers).\n\nFix by clamping both cp_hqd_cntl_stack_size to the actual allocated\nbuffer size (q->ctl_stack_size) and cp_hqd_cntl_stack_offset to the\nclamped size before performing arithmetic and copy_to_user().\n\nThis ensures we never read beyond the allocated kernel BO regardless of\nattacker-supplied MQD field values.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97496","source_modified_at":"2026-10-03T10:58:59.453Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Linux","vendor":"Linux","versions":[{"version":"42c6c48214b726c30918e8dc80e2168607d13ae4","lessThan":"e2bef0f168be46692a6b900916ff5da3771480ed","status":"affected","versionType":"git"},{"version":"42c6c48214b726c30918e8dc80e2168607d13ae4","lessThan":"d9183d974ddd5f09d029beaf359275ac20d4d5fe","status":"affected","versionType":"git"},{"version":"42c6c48214b726c30918e8dc80e2168607d13ae4","lessThan":"ec646686613d8ab05b282d1463a7baa49fd6b83b","status":"affected","versionType":"git"},{"version":"42c6c48214b726c30918e8dc80e2168607d13ae4","lessThan":"7ef144458f48d5589e36f1b3d83e83db2e5c5ba5","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97496","source_modified_at":"2026-10-03T10:58:59.453Z","fetched_at":"2026-10-23T18:52:38.922436Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.18","status":"affected"},{"version":"0","lessThan":"5.18","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.111","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.53","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-97496","source_modified_at":"2026-10-03T10:58:59.453Z","fetched_at":"2026-10-23T18:52:38.922436Z","package":{"name":"Linux","ecosystem":null},"version":"7ef144458f48d5589e36f1b3d83e83db2e5c5ba5","basis":"first unaffected version stated in the CVE record"}],"cvss":7.1,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00125,"percentile":0.02034,"score_date":"2026-10-23"},"published_at":"2026-09-24T16:04:43.625Z","modified_at":"2026-10-03T10:58:59.453Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-97496","fetched_at":"2026-10-23T18:52:38.922436Z","source_modified_at":"2026-10-03T10:58:59.453Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-97496","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/e2bef0f168be46692a6b900916ff5da3771480ed"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/d9183d974ddd5f09d029beaf359275ac20d4d5fe"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/ec646686613d8ab05b282d1463a7baa49fd6b83b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/7ef144458f48d5589e36f1b3d83e83db2e5c5ba5"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-03T10:58:59.453Z","content_hash":"da5e53a37be7421fa7db6c65199f8d2d4dce8e8ee558cb55848c6aaead64ef05"}}