{"id":"CVE-2025-68375","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/x86: Fix NULL event access and potential PEBS record loss\n\nWhen intel_pmu_drain_pebs_icl() is called to drain PEBS records, the\nperf_event_overflow() could be call…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/x86: Fix NULL event access and potential PEBS record loss\n\nWhen intel_pmu_drain_pebs_icl() is called to drain PEBS records, the\nperf_event_overflow() could be call…","severity":"none","published":"2025-12-24","updated":"2026-10-13","sourceUpdated":"2026-10-13T11:10:00.203","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2025-68375","references":[{"url":"https://git.kernel.org/stable/c/6b089028bff1f2ff9e0c62b8f1faca1a620e5d6e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7e772a93eb61cb6265bdd1c5bde17d0f2718b452","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cf69b99805c263117305ac6dffbc85aaf9259d32","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00193,"epssPercentile":0.08203,"ingestedAt":"2026-10-13T11:23:51.155Z","slug":"CVE-2025-68375","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nperf/x86: Fix NULL event access and potential PEBS record loss\n\nWhen intel_pmu_drain_pebs_icl() is called to drain PEBS records, the\nperf_event_overflow() could be called to process the last PEBS record.\n\nWhile perf_event_overflow() could trigger the interrupt throttle and\nstop all events of the group, like what the below call-chain shows.\n\nperf_event_overflow()\n  -> __perf_event_overflow()\n    ->__perf_event_account_interrupt()\n      -> perf_event_throttle_group()\n        -> perf_event_throttle()\n          -> event->pmu->stop()\n            -> x86_pmu_stop()\n\nThe side effect of stopping the events is that all corresponding event\npointers in cpuc->events[] array are cleared to NULL.\n\nAssume there are two PEBS events (event a and event b) in a group. When\nintel_pmu_drain_pebs_icl() calls perf_event_overflow() to process the\nlast PEBS record of PEBS event a, interrupt throttle is triggered and\nall pointers of event a and event b are cleared to NULL. Then\nintel_pmu_drain_pebs_icl() tries to process the last PEBS record of\nevent b and encounters NULL pointer access.\n\nTo avoid this issue, move cpuc->events[] clearing from x86_pmu_stop()\nto x86_pmu_del(). It's safe since cpuc->active_mask or\ncpuc->pebs_enabled is always checked before access the event pointer\nfrom cpuc->events[].\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}