{"id":"CVE-2026-93044","summary":"bpf: Disallow interpreter fallback for arena-related insns","details":"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 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.","modified":"2026-09-18T03:48:43.597096116Z","published":"2026-09-17T16:10:36.285Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93044.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/34746b5a84ec37c0ea2bf6808c65c5ed8790eb51"},{"type":"WEB","url":"https://git.kernel.org/stable/c/408b6d3bc19c4aa852ab7ee2f447756e52e69967"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93044.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93044"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"6082b6c328b5486da2b356eae94b8b83c98b5565"},{"fixed":"408b6d3bc19c4aa852ab7ee2f447756e52e69967"},{"fixed":"34746b5a84ec37c0ea2bf6808c65c5ed8790eb51"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93044.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.9.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93044.json"}}],"schema_version":"1.9.0"}