CVE-2026-57432 Affecting perl-base package, versions <5.26.1-150300.17.23.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.21% (11th percentile)

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  • Snyk IDSNYK-SLES154-PERLBASE-18673672
  • published12 Aug 2026
  • disclosed10 Aug 2026

Introduced: 10 Aug 2026

CVE-2026-57432  (opens in a new tab)

How to fix?

Upgrade SLES:15.4 perl-base to version 5.26.1-150300.17.23.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perl-base package and not the perl-base package as distributed by SLES. See How to fix? for SLES:15.4 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 an integer overflow in S_measure_struct leading to an out-of-bounds heap read in pack and unpack.

S_measure_struct adds each item's size times its repeat count to a running total with no overflow check, so a large repeat count in a pack or unpack template wraps the signed SSize_t total negative. The @, X, and x position codes then guard their moves with a signed length comparison that passes when the length is negative, advancing the buffer pointer out of bounds.

A template derived from untrusted input can read heap memory past the buffer and return it to the caller.

CVSS Base Scores

version 3.1