{"schema":"threatline.record/2","record":{"id":"CVE-2026-98177","aliases":[],"summary":"drm/amdkfd: Avoid integer underflow in EOP ring size calculation.","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Avoid integer underflow in EOP ring size calculation.\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\norder_base_2(q->eop_ring_buffer_size / 4) - 1\n\nBut order_base_2 can in theory return 0, so this could underflow\n(although in practice the ring buffer size cannot be less than 4096).\n\nChange this to\n\norder_base_2(q->eop_ring_buffer_size / 8)\n\nusing properties of logarithms.\n\nAlso add to the above comment to make the mathematics more clear.\n\n(cherry picked from commit f0f43fcf8b2b3a924cad9444340921c96ed5f634)","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98177","source_modified_at":"2026-10-19T09:15:08.686Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"d696d536f0a97ac779d6176107ac4e96d0a2f8b9","lessThan":"287a34c4d712e0bdb67751e21316d9c8d75a528a","status":"affected","versionType":"git"},{"version":"d696d536f0a97ac779d6176107ac4e96d0a2f8b9","lessThan":"8ee521b8b189799e361d4233c5180ba56656d4d4","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98177","source_modified_at":"2026-10-19T09:15:08.686Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"4.3","status":"affected"},{"version":"0","lessThan":"4.3","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-2026-98177","source_modified_at":"2026-10-19T09:15:08.686Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"287a34c4d712e0bdb67751e21316d9c8d75a528a","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98177","source_modified_at":"2026-10-19T09:15:08.686Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"8ee521b8b189799e361d4233c5180ba56656d4d4","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00155,"percentile":0.0432,"score_date":"2026-10-23"},"published_at":"2026-10-06T08:44:20.807Z","modified_at":"2026-10-19T09:15:08.686Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98177","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:15:08.686Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98177","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/287a34c4d712e0bdb67751e21316d9c8d75a528a"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/8ee521b8b189799e361d4233c5180ba56656d4d4"}],"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":"2026-10-19T09:15:08.686Z","content_hash":"028159555f5eda9e5739c17932d39275476eb675c8dd5990e5221ae466e4b195"}}