{"id":"CVE-2026-98477","published":"2026-10-18T16:16:58.243","lastModified":"2026-10-19T10:18:58.520","description":"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.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/249a2bd87a0e57dc28f36e992807edc9cae309b5","tags":[]},{"url":"https://git.kernel.org/stable/c/36bb85cf36cab15fb611cb44b78a5df06e4e69a2","tags":[]},{"url":"https://git.kernel.org/stable/c/b5409311b606d536cc485f3706c242c2afa93edb","tags":[]},{"url":"https://git.kernel.org/stable/c/ec15f6a50183fc01f470af74ad49900fb3731fca","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}