{"id":"CVE-2026-98613","title":"kernel: bpf: Bound ownership depth through local kptrs and graph roots (CVE-2026-98613)","summary":"A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem. A local user with permissions to load BPF programs can trigger a Denial of Service (DoS) by creating deeply nested or cyclical object references using local ker…","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-770","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 9","openshift_container_platform 4"],"published":"2026-10-18","updated":"2026-10-21","sourceUpdated":"2026-10-21T08:25:06+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98613.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98613.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98613"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2555009"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98613"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98613"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98613.mbox"},{"url":"https://git.kernel.org/stable/c/92aa0502c781d72bb9685245c3280efb3766a110"},{"url":"https://git.kernel.org/stable/c/9c11e543fec32e92b3aa3f693339ca3ee79ea9dd"},{"url":"https://git.kernel.org/stable/c/4105870a4b8afe852aeb24a6dd58e1836cc4ce58"},{"url":"https://git.kernel.org/stable/c/bfc888f04588f591851e95c974954cfca58e6c19"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00177,"epssPercentile":0.07197,"ingestedAt":"2026-10-18T15:45:12.240Z","slug":"CVE-2026-98613","body":"## Overview\n\nA flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem. A local user with permissions to load BPF programs can trigger a Denial of Service (DoS) by creating deeply nested or cyclical object references using local kernel pointers. During object cleanup, synchronous recursive processing can exhaust available kernel stack space, resulting in a system crash.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98613.json)\n\n**kernel: bpf: Bound ownership depth through local kptrs and graph roots** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-21.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\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 9\n- Red Hat OpenShift Container Platform 4\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\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\n## Remediation\n\nFix deferred","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":227034,"id":"CVE-2026-98613","ts":1792585023825,"field":"cvss","old":null,"new":"4.4"},{"seq":227033,"id":"CVE-2026-98613","ts":1792585023825,"field":"severity","old":"none","new":"medium"}]}