CVE-2026-8376 Affecting perl package, versions <5.40.1-6+e5


Severity

Recommended
0.0
critical
0
10

Snyk's Security Team recommends NVD's CVSS assessment. Learn more

Threat Intelligence

EPSS
0.44% (37th percentile)

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  • Snyk IDSNYK-ECHOLATEST-PERL-17966224
  • published14 Jul 2026
  • disclosed26 May 2026

Introduced: 26 May 2026

CVE-2026-8376  (opens in a new tab)

How to fix?

Upgrade Echo:latest perl to version 5.40.1-6+e5 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perl package and not the perl package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1