CVE-2026-97961
In the Linux kernel, the following vulnerability has been resolved: perf/core: Allow list_del during perf_event_overflow() A PMU might use perf_sched_cb_inc() and perf_sched_cb_dec() interface to get the PMU call back function pmu::sched_task invoked at schedule in and schedule out. This is achieved by walking along the list anchored by sched_cb_list. The following scenario might lead to a list corruption. perf_pmu_sched_task() for_each_list_entry(..., &sched_cb_list) +--> __perf_pmu_sched_task() +--> event->pmu->sched_task()) +--> PMU_push_sample() +--> perf_event_overflow() +--> __perf_event_overflow() +--> pmu->stop() +--> perf_sched_cb_dec() remove entry from sched_cb_list while list node in use. This happens when ioctl(fd, PERF_EVENT_IOC_REFRESH, xxx) has been invoked and perf_event::event_limit hits zero. Prevent the list corruption and convert for_each_list_entry() to for_each_list_entry_safe().
Affected versions
Linux kernel versions
6.2
and later are affected. Fixed in
6.12.111,
6.18.53,
7.2.7,
7.3-rc3
and their respective stable series.
References
4 totalFrequently asked questions
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What is CVE-2026-97961?
CVE-2026-97961 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.2 onward and has been patched in 6.12.111, 6.18.53, 7.2.7 and others. CVE-2026-97961 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-97961?
Yes. CVE-2026-97961 has been patched. Fixed versions include 6.12.111, 6.18.53, 7.2.7 and others. If you are running Linux kernel 6.2 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-97961 actively exploited?
No. CVE-2026-97961 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.