USN-8675-2: Perl vulnerabilities
Publication date
9 September 2026
Overview
Several security issues were fixed in Perl.
Releases
Packages
- perl - Practical Extraction and Report Language
Details
USN-8675-1 fixed vulnerabilities in Perl. This update provides the
corresponding fix for Perl on Ubuntu 26.04 LTS.
Original advisory details:
It was discovered that Perl incorrectly handled short source addresses
in the Socket module. An attacker could possibly use this issue to
trigger an out-of-bounds heap read, resulting in information disclosure.
(CVE-2026-12087)
It was discovered that Perl incorrectly handled regular expressions
containing a large number of fixed string alternatives. An attacker
could possibly use this issue to cause incorrect regular expression
matches, resulting in security restrictions being bypassed.
(CVE-2026-13221)
It was discovered that Perl incorrectly handled certain large repeat
counts when processing pack and unpack templates. An attacker could
possibly use this issue to trigger an...
USN-8675-1 fixed vulnerabilities in Perl. This update provides the
corresponding fix for Perl on Ubuntu 26.04 LTS.
Original advisory details:
It was discovered that Perl incorrectly handled short source addresses
in the Socket module. An attacker could possibly use this issue to
trigger an out-of-bounds heap read, resulting in information disclosure.
(CVE-2026-12087)
It was discovered that Perl incorrectly handled regular expressions
containing a large number of fixed string alternatives. An attacker
could possibly use this issue to cause incorrect regular expression
matches, resulting in security restrictions being bypassed.
(CVE-2026-13221)
It was discovered that Perl incorrectly handled certain large repeat
counts when processing pack and unpack templates. An attacker could
possibly use this issue to trigger an out-of-bounds heap read, resulting
in information disclosure. (CVE-2026-57432)
It was discovered that Perl incorrectly handled certain crafted data
when deserializing with the Storable module. An attacker could possibly
use this issue to trigger an integer overflow and application
termination, resulting in a denial of service. (CVE-2026-57433)
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 | ||
|---|---|---|---|
| 26.04 LTS resolute | libperl5.40 – 5.40.1-7ubuntu0.3 | ||
| perl-base – 5.40.1-7ubuntu0.3 | |||
| perl-modules-5.40 – 5.40.1-7ubuntu0.3 | |||
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