{"id":"CVE-2026-93044","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Disallow interpreter fallback for arena-related insns\n\nSince the interpreter does not support the arena-related insns,\ninterpreter fallback should not be allowed f…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Disallow interpreter fallback for arena-related insns\n\nSince the interpreter does not support the arena-related insns,\ninterpreter fallback should not be allowed f…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 6082b6c328b5486da2b356eae94b8b83c98b5565 < 408b6d3bc19c4aa852ab7ee2f447756e52e69967","Linux >= 6082b6c328b5486da2b356eae94b8b83c98b5565 < 34746b5a84ec37c0ea2bf6808c65c5ed8790eb51","Linux 6.9"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:57.643","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93044","references":[{"url":"https://git.kernel.org/stable/c/34746b5a84ec37c0ea2bf6808c65c5ed8790eb51","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/408b6d3bc19c4aa852ab7ee2f447756e52e69967","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93044.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93044"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536525"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93044"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93044"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93044.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-17T16:21:47.772Z","epss":0.00198,"epssPercentile":0.09453,"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-843"],"slug":"CVE-2026-93044","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Disallow interpreter fallback for arena-related insns\n\nSince the interpreter does not support the arena-related insns,\ninterpreter fallback should not be allowed for these insns in\ncore.c::__bpf_prog_select_runtime().\n\nCurrently, when the interpreter executes the arena ST/LDX/STX insns,\nit would hit the BUG_ON() in ___bpf_prog_run() at run time.\n\n[    2.579196] BPF interpreter: unknown opcode a2 (imm: 0x0)\n[    2.579998] ------------[ cut here ]------------\n[    2.580652] kernel BUG at kernel/bpf/core.c:2349!\n[    2.581314] Oops: invalid opcode: 0000 [#1] SMP PTI\n\nSet jit_required as true when arena map is used in the prog to disallow\ninterpreter fallback for arena-related insns.\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 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 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93044.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":225511,"id":"CVE-2026-93044","ts":1792498276841,"field":"cvss","old":null,"new":"5.5"},{"seq":225510,"id":"CVE-2026-93044","ts":1792498276841,"field":"severity","old":"none","new":"medium"}]}