{"schema":"threatline.record/2","record":{"id":"CVE-2026-98176","aliases":[],"summary":"drm/amdkfd: Avoid integer underflow with ffs in EOP ring size calc","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Avoid integer underflow with ffs in EOP ring size calc\n\nThe low 6 bits of cp_hqd_eop_control store the base-2 logarithm\nof the EOP ring size. This was calculated as\n\nffs(q->eop_ring_buffer_size / sizeof(unsigned int)) - 1 - 1\n\nBut ffs can in theory return 1 or 0, so this could underflow\n(although in practice the ring buffer size cannot be less than 4096).\n\nChange this to\n\nffs(q->eop_ring_buffer_size / sizeof(unsigned int) / 4)\n\nusing properties of logarithms.\n\n(cherry picked from commit 4f18c56630383c14bfc6b2d65f88f2f895d2121a)","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98176","source_modified_at":"2026-10-19T09:15:07.720Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"14328aa58ce523a59996c5a82681c43ec048cc33","lessThan":"82e1b8299c6da02ce02185c208d2fdf7572b5ea1","status":"affected","versionType":"git"},{"version":"14328aa58ce523a59996c5a82681c43ec048cc33","lessThan":"c883d0a132d430ef7ebb23fd94323be94d0fbdb8","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98176","source_modified_at":"2026-10-19T09:15:07.720Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.3","status":"affected"},{"version":"0","lessThan":"5.3","status":"unaffected","versionType":"semver"},{"version":"7.2.8","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98176","source_modified_at":"2026-10-19T09:15:07.720Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"82e1b8299c6da02ce02185c208d2fdf7572b5ea1","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00162,"percentile":0.05094,"score_date":"2026-10-23"},"published_at":"2026-10-06T08:44:20.004Z","modified_at":"2026-10-19T09:15:07.720Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98176","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:15:07.720Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98176","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/82e1b8299c6da02ce02185c208d2fdf7572b5ea1"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c883d0a132d430ef7ebb23fd94323be94d0fbdb8"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:15:07.720Z","content_hash":"066b87afdb49dd903d6d1c2dd9305be1662f2cd2a6302c54ad6e2f11326b87ed"}}