{"id":"CVE-2026-97961","state":"PUBLISHED","title":"perf/core: Allow list_del during perf_event_overflow()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/core: Allow list_del during perf_event_overflow()\n\nA PMU might use perf_sched_cb_inc() and perf_sched_cb_dec()\ninterface to get the PMU call back function pmu::sched_task\ninvoked at schedule in and schedule out. This is achieved\nby walking along the list anchored by sched_cb_list.\n\nThe following scenario might lead to a list corruption.\n\n   perf_pmu_sched_task()\n      for_each_list_entry(..., &sched_cb_list)\n      +--> __perf_pmu_sched_task()\n           +--> event->pmu->sched_task())\n                +--> PMU_push_sample()\n                     +--> perf_event_overflow()\n                          +--> __perf_event_overflow()\n                               +--> pmu->stop()\n                                    +--> perf_sched_cb_dec()\n                                         remove entry from sched_cb_list\n                                         while list node in use.\n\nThis happens when ioctl(fd, PERF_EVENT_IOC_REFRESH, xxx) has been\ninvoked and perf_event::event_limit hits zero.\n\nPrevent the list corruption and convert for_each_list_entry()\nto for_each_list_entry_safe().","publishedAt":"2026-09-25T10:23:05.547Z","updatedAt":"2026-10-21T12:53:52.027Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bd27568117664b8b3e259721393df420ed51f57b","status":"affected","lessThan":"fa360a018369f3eb4fe4f4792238adfc1f6fd5dc","versionType":"git"},{"version":"bd27568117664b8b3e259721393df420ed51f57b","status":"affected","lessThan":"723e85fb2c3bcd237ac02cbd69502ed62ce0068c","versionType":"git"},{"version":"bd27568117664b8b3e259721393df420ed51f57b","status":"affected","lessThan":"6d0b9ce3be221c9077653f3670d60d66bb725ee2","versionType":"git"},{"version":"bd27568117664b8b3e259721393df420ed51f57b","status":"affected","lessThan":"e2770c76a02452fddb52e9e05c7ed6acfef06c32","versionType":"git"},{"version":"bd27568117664b8b3e259721393df420ed51f57b","status":"affected","lessThan":"59e63416f5153e7d58652c616fbdcb7d5e01fff7","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/events/core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/events/core.c"]}],"references":["https://git.kernel.org/stable/c/fa360a018369f3eb4fe4f4792238adfc1f6fd5dc","https://git.kernel.org/stable/c/723e85fb2c3bcd237ac02cbd69502ed62ce0068c","https://git.kernel.org/stable/c/6d0b9ce3be221c9077653f3670d60d66bb725ee2","https://git.kernel.org/stable/c/e2770c76a02452fddb52e9e05c7ed6acfef06c32","https://git.kernel.org/stable/c/59e63416f5153e7d58652c616fbdcb7d5e01fff7"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/97xxx/CVE-2026-97961.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-97961","state":"PUBLISHED","datePublished":"2026-09-25T10:23:05.547Z","dateUpdated":"2026-10-21T12:53:52.027Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:18:58.206Z"},"containers":{"cna":{"title":"perf/core: Allow list_del during perf_event_overflow()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf/core: Allow list_del during perf_event_overflow()\n\nA PMU might use perf_sched_cb_inc() and perf_sched_cb_dec()\ninterface to get the PMU call back function pmu::sched_task\ninvoked at schedule in and schedule out. This is achieved\nby walking along the list anchored by sched_cb_list.\n\nThe following scenario might lead to a list corruption.\n\n   perf_pmu_sched_task()\n      for_each_list_entry(..., &sched_cb_list)\n      +--> __perf_pmu_sched_task()\n           +--> event->pmu->sched_task())\n                +--> PMU_push_sample()\n                     +--> perf_event_overflow()\n                          +--> __perf_event_overflow()\n                               +--> pmu->stop()\n                                    +--> perf_sched_cb_dec()\n                                         remove entry from sched_cb_list\n                                         while list node in use.\n\nThis happens when ioctl(fd, PERF_EVENT_IOC_REFRESH, xxx) has been\ninvoked and perf_event::event_limit hits zero.\n\nPrevent the list corruption and convert for_each_list_entry()\nto for_each_list_entry_safe()."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bd27568117664b8b3e259721393df420ed51f57b","status":"affected","lessThan":"fa360a018369f3eb4fe4f4792238adfc1f6fd5dc","versionType":"git"},{"version":"bd27568117664b8b3e259721393df420ed51f57b","status":"affected","lessThan":"723e85fb2c3bcd237ac02cbd69502ed62ce0068c","versionType":"git"},{"version":"bd27568117664b8b3e259721393df420ed51f57b","status":"affected","lessThan":"6d0b9ce3be221c9077653f3670d60d66bb725ee2","versionType":"git"},{"version":"bd27568117664b8b3e259721393df420ed51f57b","status":"affected","lessThan":"e2770c76a02452fddb52e9e05c7ed6acfef06c32","versionType":"git"},{"version":"bd27568117664b8b3e259721393df420ed51f57b","status":"affected","lessThan":"59e63416f5153e7d58652c616fbdcb7d5e01fff7","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/events/core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/events/core.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/fa360a018369f3eb4fe4f4792238adfc1f6fd5dc"},{"url":"https://git.kernel.org/stable/c/723e85fb2c3bcd237ac02cbd69502ed62ce0068c"},{"url":"https://git.kernel.org/stable/c/6d0b9ce3be221c9077653f3670d60d66bb725ee2"},{"url":"https://git.kernel.org/stable/c/e2770c76a02452fddb52e9e05c7ed6acfef06c32"},{"url":"https://git.kernel.org/stable/c/59e63416f5153e7d58652c616fbdcb7d5e01fff7"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-21T12:53:52.027Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.12.111"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.18.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"7.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}