CVE-2026-8376

EIP tracks 1 public exploit for CVE-2026-8376. PoCs published by CYFARE.

AI-analyzed exploit summary This repository contains a functional proof-of-concept exploit for CVE-2026-8376, a heap buffer overflow in Perl's regex compilation on 32-bit builds. The exploit triggers an integer overflow by crafting a regex pattern with a large repetition count, leading to memory corruption.

Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds. Perl_study_chunk in regcomp_study.c checked the size of the joined substring buffer in characters rather than bytes. For a quantified fixed substring with a large minimum count, the byte length mincount * l could overflow SSize_t, producing an undersized SvGROW allocation; the subsequent copy writes past the end of the buffer. A caller that compiles an attacker-controlled regular expression on a 32-bit perl build triggers a heap buffer overflow at compile time.