{"id":"CVE-2026-98572","title":"kernel: bpf: Fix immediate JMP JEQ/JNE on MIPS32 (CVE-2026-98572)","summary":"A flaw was found in the Linux kernel's extended Berkeley Packet Filter (eBPF) Just-In-Time (JIT) compiler on 32-bit MIPS systems. An instruction generation error during 64-bit jump comparisons causes negative numeric constants to be incorr…","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","cvssSource":"vendor","cwe":"CWE-1025","vendor":"Red Hat","product":"Linux","affected":["Linux >= eb63cfcd2ee8ec3805f6881f43341f589c3d2278 < 1547e9f3a7d71971216e6dba30270cae13fe4e02","Linux >= eb63cfcd2ee8ec3805f6881f43341f589c3d2278 < beeae92e70e705e90a0d6d9b3b8498ee3b92f495","Linux >= eb63cfcd2ee8ec3805f6881f43341f589c3d2278 < 6f939529ed6c580e9b6c5daa20be67fa0b3d4cf0","Linux >= eb63cfcd2ee8ec3805f6881f43341f589c3d2278 < 876ef04c75c2751acfd355606fca3eced71dec65","Linux >= eb63cfcd2ee8ec3805f6881f43341f589c3d2278 < 1bd91670966a7142ac94f2cebe2b5ae6bf5cb0c8","Linux >= eb63cfcd2ee8ec3805f6881f43341f589c3d2278 < db762fd96be225bd06161c9631160c755d891693","Linux 5.16"],"published":"2026-10-18","updated":"2026-10-20","sourceUpdated":"2026-10-20T03:20:21+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98572.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98572.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98572"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2554973"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98572"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98572"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98572.mbox"},{"url":"https://git.kernel.org/stable/c/1547e9f3a7d71971216e6dba30270cae13fe4e02"},{"url":"https://git.kernel.org/stable/c/beeae92e70e705e90a0d6d9b3b8498ee3b92f495"},{"url":"https://git.kernel.org/stable/c/6f939529ed6c580e9b6c5daa20be67fa0b3d4cf0"},{"url":"https://git.kernel.org/stable/c/876ef04c75c2751acfd355606fca3eced71dec65"},{"url":"https://git.kernel.org/stable/c/1bd91670966a7142ac94f2cebe2b5ae6bf5cb0c8"},{"url":"https://git.kernel.org/stable/c/db762fd96be225bd06161c9631160c755d891693"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00211,"epssPercentile":0.11316,"ingestedAt":"2026-10-18T15:45:12.257Z","slug":"CVE-2026-98572","body":"## Overview\n\nA flaw was found in the Linux kernel's extended Berkeley Packet Filter (eBPF) Just-In-Time (JIT) compiler on 32-bit MIPS systems. An instruction generation error during 64-bit jump comparisons causes negative numeric constants to be incorrectly evaluated against a hardware register instead of the intended values. A local user capable of loading BPF programs can exploit this issue to produce invalid comparison results, potentially bypassing security filters or causing unexpected program execution paths.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98572.json)\n\n**kernel: bpf: Fix immediate JMP JEQ/JNE on MIPS32** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-20.\n\nNot affected:\n\n- Red Hat Enterprise Linux 10\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\nRefer to the advisory for fix availability.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":225781,"id":"CVE-2026-98572","ts":1792498451525,"field":"cvss","old":null,"new":"4.4"},{"seq":225780,"id":"CVE-2026-98572","ts":1792498451525,"field":"severity","old":"none","new":"medium"}]}