{"id":"CVE-2026-89580","title":"kernel: bpf: Disable preemption in __bpf_get_stack (CVE-2026-89580)","summary":"A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem. A local attacker could exploit a timing issue in the `__bpf_get_stack` function. This occurs when a preemptible BPF program is scheduled out, allowing another t…","severity":"high","cvss":7,"cvssVector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"vendor","cwe":"CWE-787","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 7","enterprise_linux 8","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-18","sourceUpdated":"2026-09-18T17:47:42+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89580.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89580.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89580"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532292"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89580"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89580"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89580.mbox"},{"url":"https://git.kernel.org/stable/c/8c5ba022f2085ea42d011497a6e92e527d123b9b"},{"url":"https://git.kernel.org/stable/c/9a23747909fcae707990c8466c381a0e7acfaa4e"},{"url":"https://git.kernel.org/stable/c/b1a47b2708d4e95dbd23aee2ec83752190897b3f"},{"url":"https://git.kernel.org/stable/c/dbfecc8a6631c0d3626c14ba1f1a485a4498445a"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00128,"epssPercentile":0.02855,"scores":{"vendor":6.3,"cna":7.8},"ingestedAt":"2026-09-14T15:23:07.474Z","slug":"CVE-2026-89580","body":"## Overview\n\nA flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem. A local attacker could exploit a timing issue in the `__bpf_get_stack` function. This occurs when a preemptible BPF program is scheduled out, allowing another task to overwrite a per-CPU buffer. This leads to an out-of-bounds write, potentially causing memory corruption.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89580.json)\n\n**kernel: bpf: Disable preemption in __bpf_get_stack** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\n\n## Remediation\n\nAffected","depth":"twilight","depthScore":39,"depthScoreParts":{"impact":38.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":208152,"id":"CVE-2026-89580","ts":1789922725391,"field":"cvss","old":"6.3","new":"7"},{"seq":208151,"id":"CVE-2026-89580","ts":1789922725391,"field":"severity","old":"medium","new":"high"},{"seq":202871,"id":"CVE-2026-89580","ts":1789403732749,"field":"cvss","old":"7.8","new":"6.3"},{"seq":202870,"id":"CVE-2026-89580","ts":1789403732749,"field":"severity","old":"high","new":"medium"},{"seq":197902,"id":"CVE-2026-89580","ts":1789384320878,"field":"cvss","old":"6.3","new":"7.8"},{"seq":197901,"id":"CVE-2026-89580","ts":1789384320878,"field":"severity","old":"medium","new":"high"},{"seq":183453,"id":"CVE-2026-89580","ts":1789356675428,"field":"cvss","old":"7.8","new":"6.3"},{"seq":183452,"id":"CVE-2026-89580","ts":1789356675428,"field":"severity","old":"high","new":"medium"},{"seq":153394,"id":"CVE-2026-89580","ts":1789285350338,"field":"cvss","old":null,"new":"7.8"},{"seq":153393,"id":"CVE-2026-89580","ts":1789285350338,"field":"severity","old":"none","new":"high"},{"seq":147418,"id":"CVE-2026-89580","ts":1789270210831,"field":"cvss","old":null,"new":"6.3"},{"seq":147417,"id":"CVE-2026-89580","ts":1789270210831,"field":"severity","old":"none","new":"medium"},{"seq":109176,"id":"CVE-2026-89580","ts":1789183730608,"field":"cvss","old":null,"new":"6.3"},{"seq":109175,"id":"CVE-2026-89580","ts":1789183730608,"field":"severity","old":"none","new":"medium"}]}