CVEvulnerability

CVE-2026-8376

9.8 CRITICAL Published 2026-05-26 Modified 2026-09-08 Official page ↗
Status
Modified
Published
2026-05-26
Last modified
2026-09-08
Assigner
9b29abf9-4ab0-4765-b253-1875cd9b441e
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.3 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Weaknesses
CWE-680

Description

Perl versions before 5.40.5-RC1, from 5.41.0 before 5.42.3-RC1, from 5.43.0 before 5.43.11 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.

Affected configurations

• perl perl (<= 5.43.10)

Related

Weakness · CWE (1)

  • CWE-680 Integer Overflow to Buffer Overflow weakness

References