CVE-2026-9538 Affecting perl package, versions *


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.52% (44th percentile)

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  • Snyk IDSNYK-UBUNTU2604-PERL-16877732
  • published10 Nov 2026
  • disclosed26 May 2026

Introduced: 26 May 2026

CVE-2026-9538  (opens in a new tab)

How to fix?

There is no fixed version for Ubuntu:26.04 perl.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perl package and not the perl package as distributed by Ubuntu. See How to fix? for Ubuntu:26.04 relevant fixed versions and status.

Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header.

_read_tar() reads each entry's payload with $handle->read($$data, $block), where $block is derived from the entry's 12-byte size field in the tar header with no upper bound on that value.

A crafted header declaring a multi-gigabyte size causes Perl to allocate a scalar of that size.

CVSS Base Scores

version 3.1