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[USN-8684-1] Perl vulnerabilities

Posted on 31 August 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8684-1
August 27, 2026

perl vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 24.04 LTS

Summary:

Perl could be made to crash or run programs as your login if it
opened a specially crafted file.

Software Description:
- perl: Practical Extraction and Report Language

Details:

It was discovered that Perl incorrectly handled certain arguments to
Socket and pack/unpack functions. An attacker could possibly use this
issue to read sensitive information from memory.
(CVE-2026-12087, CVE-2026-57432)

It was discovered that Perl incorrectly handled regular expressions
with a large number of alternation branches. An attacker could
possibly use this issue to cause incorrect matching results.
(CVE-2026-13221)

It was discovered that Perl incorrectly handled certain files. An
attacker could possibly use this issue to cause a denial of service.
(CVE-2026-57433, CVE-2025-15649, CVE-2026-48959, CVE-2026-9538)

It was discovered that Perl incorrectly handled certain inputs. An
attacker could possibly use this issue to execute arbitrary code.
(CVE-2026-48962)

It was discovered that Perl incorrectly handled credential headers
during cross-origin redirects in HTTP::Tiny. An attacker could
possibly use this issue to expose sensitive information.
(CVE-2026-7017)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 24.04 LTS
perl 5.38.2-3.2ubuntu0.4
perl-modules-5.38 5.38.2-3.2ubuntu0.4

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8684-1
CVE-2025-15649, CVE-2026-12087, CVE-2026-13221, CVE-2026-48959,
CVE-2026-48962, CVE-2026-57432, CVE-2026-57433, CVE-2026-7017,
CVE-2026-9538

Package Information:
https://launchpad.net/ubuntu/+source/perl/5.38.2-3.2ubuntu0.4

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