CVE-2026-93044

Unknown

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Disallow interpreter fallback for arena-related insns Since the interpreter does not support the arena-related insns, interpreter fallback should not be allowed for these insns in core.c::__bpf_prog_select_runtime(). Currently, when the interpreter executes the arena ST/LDX/STX insns, it would hit the BUG_ON() in ___bpf_prog_run() at run time. [ 2.579196] BPF interpreter: unknown opcode a2 (imm: 0x0) [ 2.579998] ------------[ cut here ]------------ [ 2.580652] kernel BUG at kernel/bpf/core.c:2349! [ 2.581314] Oops: invalid opcode: 0000 [#1] SMP PTI Set jit_required as true when arena map is used in the prog to disallow interpreter fallback for arena-related insns.

SeverityUnknown

CVSS—

Exploit probability—

Product

Linux

PublishedSep 17, 2026

First seenSep 17, 2026

How to fix

Update

Linux Linux408b6d3bc19c4aa852ab7ee2f447756e52e69967, 34746b5a84ec37c0ea2bf6808c65c5ed8790eb51 or later

Affected products

Product	Affected versions	Fixed in
Linux Linux	6082b6c328b5486da2b356eae94b8b83c98b5565 ≤ v < 408b6d3bc19c4aa852ab7ee2f447756e52e69967, 6082b6c328b5486da2b356eae94b8b83c98b5565 ≤ v < 34746b5a84ec37c0ea2bf6808c65c5ed8790eb51, 6.9	408b6d3bc19c4aa852ab7ee2f447756e52e69967, 34746b5a84ec37c0ea2bf6808c65c5ed8790eb51

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