Out-of-bounds Read Affecting perl-parent package, versions *


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.21% (12th percentile)

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  • Snyk IDSNYK-RHEL6-PERLPARENT-18549266
  • published5 Aug 2026
  • disclosed13 Jul 2026

Introduced: 13 Jul 2026

NewCVE-2026-57432  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:6 perl-parent.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perl-parent package and not the perl-parent package as distributed by RHEL. See How to fix? for RHEL:6 relevant fixed versions and status.

Perl versions through 5.43.10 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