CVE-2026-98477Medium· 5.5▾ SunlitIn 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 ta…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 20.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
— → 5.5
none → medium
Last analysed / modified upstream
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.
Linux >= bd27568117664b8b3e259721393df420ed51f57b < 98181f9721f75f1a544dc563b0d8fed1d5c398d5Linux >= bd27568117664b8b3e259721393df420ed51f57b < b5409311b606d536cc485f3706c242c2afa93edbLinux >= bd27568117664b8b3e259721393df420ed51f57b < 249a2bd87a0e57dc28f36e992807edc9cae309b5Linux >= bd27568117664b8b3e259721393df420ed51f57b < ec15f6a50183fc01f470af74ad49900fb3731fcaLinux >= bd27568117664b8b3e259721393df420ed51f57b < 36bb85cf36cab15fb611cb44b78a5df06e4e69a2Linux 6.2Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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