{"schema":"threatline.record/2","record":{"id":"CVE-2026-98477","aliases":[],"summary":"perf/core: Fix NULL pmu_ctx passed to pmu->sched_task()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/core: Fix NULL pmu_ctx passed to pmu->sched_task()\n\nperf_pmu_sched_task() returns early when cpuctx->task_ctx is set, and\ncpc->task_epc is only non-NULL while a task context is scheduled in on\nthis CPU. __perf_pmu_sched_task() therefore always passes NULL:\n\n  Unable to handle kernel NULL pointer dereference at virtual address 00\n  pc : armv8pmu_sched_task+0x14/0x50\n  Call trace:\n   armv8pmu_sched_task+0x14/0x50 (P)\n   perf_pmu_sched_task+0xac/0x108\n   __perf_event_task_sched_out+0x6c/0xe0\n\nPass &cpc->epc instead, the CPU-wide context for this PMU, which the\nfunction already dereferences a few lines up to find pmu.\n\narmv8pmu_sched_task() is the only in-tree implementation that\ndereferences the argument, and it only reads ->pmu, so the oops needs\nBRBE, added in v6.17.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98477","source_modified_at":"2026-10-21T12:55:10.170Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"bd27568117664b8b3e259721393df420ed51f57b","lessThan":"98181f9721f75f1a544dc563b0d8fed1d5c398d5","status":"affected","versionType":"git"},{"version":"bd27568117664b8b3e259721393df420ed51f57b","lessThan":"b5409311b606d536cc485f3706c242c2afa93edb","status":"affected","versionType":"git"},{"version":"bd27568117664b8b3e259721393df420ed51f57b","lessThan":"249a2bd87a0e57dc28f36e992807edc9cae309b5","status":"affected","versionType":"git"},{"version":"bd27568117664b8b3e259721393df420ed51f57b","lessThan":"ec15f6a50183fc01f470af74ad49900fb3731fca","status":"affected","versionType":"git"},{"version":"bd27568117664b8b3e259721393df420ed51f57b","lessThan":"36bb85cf36cab15fb611cb44b78a5df06e4e69a2","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98477","source_modified_at":"2026-10-21T12:55:10.170Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.2","status":"affected"},{"version":"0","lessThan":"6.2","status":"unaffected","versionType":"semver"},{"version":"6.6.160","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.55","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.9","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-2026-98477","source_modified_at":"2026-10-21T12:55:10.170Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"98181f9721f75f1a544dc563b0d8fed1d5c398d5","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98477","source_modified_at":"2026-10-21T12:55:10.170Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"249a2bd87a0e57dc28f36e992807edc9cae309b5","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98477","source_modified_at":"2026-10-21T12:55:10.170Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"36bb85cf36cab15fb611cb44b78a5df06e4e69a2","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00168,"percentile":0.05728,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:15:51.475Z","modified_at":"2026-10-21T12:55:10.170Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98477","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-21T12:55:10.170Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98477","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/98181f9721f75f1a544dc563b0d8fed1d5c398d5"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b5409311b606d536cc485f3706c242c2afa93edb"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/249a2bd87a0e57dc28f36e992807edc9cae309b5"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/ec15f6a50183fc01f470af74ad49900fb3731fca"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/36bb85cf36cab15fb611cb44b78a5df06e4e69a2"}],"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":"2026-10-21T12:55:10.170Z","content_hash":"cd8f8dadb31c64f8dde0245d47017a6431597f3031aacc9e37081d8ab0c61cee"}}