UNKNOWN NVD
CVE-2026-98477
In the Linux kernel, the following vulnerability has been resolved: perf/core: Fix NULL pmu_ctx passed to pmu->sched_task() perf_pmu_sched_task() returns earl
In the Linux kernel, the following vulnerability has been resolved:
perf/core: Fix NULL pmu_ctx passed to pmu->sched_task()
perf_pmu_sched_task() returns early when cpuctx->task_ctx is set, and
cpc->task_epc is only non-NULL while a task context is scheduled in on
this CPU. __perf_pmu_sched_task() therefore always passes NULL:
Unable to handle kernel NULL pointer dereference at virtual address 00
pc : armv8pmu_sched_task+0x14/0x50
Call trace:
armv8pmu_sched_task+0x14/0x50 (P)
perf_pmu_sched_task+0xac/0x108
__perf_event_task_sched_out+0x6c/0xe0
Pass &cpc->epc instead, the CPU-wide context for this PMU, which the
function already dereferences a few lines up to find pmu.
armv8pmu_sched_task() is the only in-tree implementation that
dereferences the argument, and it only reads ->pmu, so the oops needs
BRBE, added in v6.17.
References
- https://git.kernel.org/stable/c/249a2bd87a0e57dc28f36e992807edc9cae309b5
- https://git.kernel.org/stable/c/36bb85cf36cab15fb611cb44b78a5df06e4e69a2
- https://git.kernel.org/stable/c/b5409311b606d536cc485f3706c242c2afa93edb
- https://git.kernel.org/stable/c/ec15f6a50183fc01f470af74ad49900fb3731fca
This unknown severity vulnerability was published on 2026-10-18 via NVD.
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