USN-8736-2: Perl vulnerabilities
Publication date
16 September 2026
Overview
Several security issues were fixed in Perl.
Releases
Packages
- perl - Practical Extraction and Report Language
Details
USN-8736-1 fixed vulnerabilities in Perl. This update provides the
corresponding fix for Perl on Ubuntu 24.04 LTS.
Original advisory details:
It was discovered that Perl incorrectly handled certain large inputs during
regular expression matching. An attacker could possibly use this issue to
trigger out-of-bounds heap reads or writes, resulting in a denial of
service or arbitrary code execution. (CVE-2026-15534)
It was discovered that Perl incorrectly handled certain regular expression
containing alternative matching branches. An attacker could possibly use
this issue to cause incorrect regular expression matches, resulting in
security restrictions being bypassed. (CVE-2026-19487)
USN-8736-1 fixed vulnerabilities in Perl. This update provides the
corresponding fix for Perl on Ubuntu 24.04 LTS.
Original advisory details:
It was discovered that Perl incorrectly handled certain large inputs during
regular expression matching. An attacker could possibly use this issue to
trigger out-of-bounds heap reads or writes, resulting in a denial of
service or arbitrary code execution. (CVE-2026-15534)
It was discovered that Perl incorrectly handled certain regular expression
containing alternative matching branches. An attacker could possibly use
this issue to cause incorrect regular expression matches, resulting in
security restrictions being bypassed. (CVE-2026-19487)
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 24.04 LTS noble | libperl-dev – 5.38.2-3.2ubuntu0.6 | ||
| libperl5.38t64 – 5.38.2-3.2ubuntu0.6 | |||
| perl-base – 5.38.2-3.2ubuntu0.6 | |||
| perl-debug – 5.38.2-3.2ubuntu0.6 | |||
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