{"id":"CVE-2026-98790","title":"kernel: perf: Fix race between perf_event_exit_task() and perf_pending_task() (CVE-2026-98790)","summary":"A flaw was found in the Linux kernel's performance monitoring subsystem. A race condition occurs during process execution when cleaning up performance events while a task event is still pending. A local user could exploit this flaw to trig…","severity":"medium","cvss":4.7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-366","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 6","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-23","sourceUpdated":"2026-10-23T15:23:24+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98790.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98790.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98790"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555190"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98790"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98790"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98790.mbox"},{"url":"https://git.kernel.org/stable/c/655acfa713bce9ae9c81a654459890c2f58cb4e8"},{"url":"https://git.kernel.org/stable/c/672b8a9ce8f51b991481dfde26fba5cc4340a91a"},{"url":"https://git.kernel.org/stable/c/524063fea29f8a841e49927ea7a8085194ad3ec2"},{"url":"https://git.kernel.org/stable/c/81e61e3f8befa1bae3ec8e779d8ada5e5e362c21"},{"url":"https://git.kernel.org/stable/c/ffb684f2aa141eeb0caa6308422e7e05d1ded7c4"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00168,"epssPercentile":0.05974,"ingestedAt":"2026-10-18T16:47:32.486Z","slug":"CVE-2026-98790","body":"## Overview\n\nA flaw was found in the Linux kernel's performance monitoring subsystem. A race condition occurs during process execution when cleaning up performance events while a task event is still pending. A local user could exploit this flaw to trigger an internal kernel warning, potentially leading to a Denial of Service (DoS) via system instability or a crash.\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 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98790.json)\n\n**kernel: perf: Fix race between perf_event_exit_task() and perf_pending_task()** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nOut of support scope","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":228736,"id":"CVE-2026-98790","ts":1792844943648,"field":"cvss","old":null,"new":"4.7"},{"seq":228735,"id":"CVE-2026-98790","ts":1792844943648,"field":"severity","old":"none","new":"medium"}]}