{"id":"CVE-2026-97961","title":"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::sch…","summary":"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::sch…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= bd27568117664b8b3e259721393df420ed51f57b < 723e85fb2c3bcd237ac02cbd69502ed62ce0068c","Linux >= bd27568117664b8b3e259721393df420ed51f57b < 6d0b9ce3be221c9077653f3670d60d66bb725ee2","Linux >= bd27568117664b8b3e259721393df420ed51f57b < e2770c76a02452fddb52e9e05c7ed6acfef06c32","Linux >= bd27568117664b8b3e259721393df420ed51f57b < 59e63416f5153e7d58652c616fbdcb7d5e01fff7","Linux 6.2"],"published":"2026-09-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T11:17:23.860","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97961","references":[{"url":"https://git.kernel.org/stable/c/59e63416f5153e7d58652c616fbdcb7d5e01fff7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6d0b9ce3be221c9077653f3670d60d66bb725ee2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/723e85fb2c3bcd237ac02cbd69502ed62ce0068c","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e2770c76a02452fddb52e9e05c7ed6acfef06c32","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97961.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-97961"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2541098"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97961"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97961"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97961.mbox"},{"url":"https://git.kernel.org/stable/c/fa360a018369f3eb4fe4f4792238adfc1f6fd5dc"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-25T11:06:38.875Z","epss":0.00168,"epssPercentile":0.06162,"cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-825"],"slug":"CVE-2026-97961","body":"## Overview\n\nIn 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().\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97961.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":213393,"id":"CVE-2026-97961","ts":1790754704067,"field":"cvss","old":null,"new":"5.5"},{"seq":213392,"id":"CVE-2026-97961","ts":1790754704067,"field":"severity","old":"none","new":"medium"}]}