CVE-2026-8376
Title: Heap Buffer Overflow in Perl Regular Expression Compiler
Proof Of Concept
No public PoC currently indexed for CVE-2026-8376.
Vulnerability Summary
CVE-2026-8376: 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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Associated Attack Patterns (CAPEC)
Total: PatternsNo specific attack patterns mapped.
CVE-2026-8376 Exploits & PoCs (Proof Of Concept)
No public PoCs found in our database for this CVE.
Vulnerability data updated via NVD.
Vulnerability data updated via NVD.
Vulnerability data updated via NVD.
Vulnerability data updated via NVD.
Attack Vector Matrix
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected Stack
No specific products linked.