CVE-2026-8376 Affecting perl-POSIX-debuginfo package, versions <0:1.94-477.amzn2023.0.9


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.05% (16th percentile)

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  • Snyk IDSNYK-AMZN2023-PERLPOSIXDEBUGINFO-17291151
  • published10 Jun 2026
  • disclosed26 May 2026

Introduced: 26 May 2026

NewCVE-2026-8376  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 perl-POSIX-debuginfo to version 0:1.94-477.amzn2023.0.9 or higher.
This issue was patched in ALAS2023-2026-1819.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perl-POSIX-debuginfo package and not the perl-POSIX-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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 Base Scores

version 3.1