CVE-2026-31525

A flaw was found in the Linux kernel's Berkeley Packet Filter (BPF) interpreter. The interpreter's signed 32-bit division and modulo operations exhibit undefined behavior when processing the minimum 32-bit signed integer value (S32_MIN) due to an incorrect use of the `abs()` macro. This inconsistency between the interpreter's execution and the verifier's expected behavior can be leveraged by a local attacker. Successful exploitation could lead to out-of-bounds memory access within BPF maps, potentially resulting in information disclosure or privilege escalation.