CVE-2024-56406: Perl

High severity, CVSS 8.4. EPSS: 0.5% chance of exploitation in the next 30 days.

A heap buffer overflow vulnerability was discovered in Perl. Release branches 5.34, 5.36, 5.38 and 5.40 are affected, including development versions from 5.33.1 through 5.41.10. When there are non-ASCII bytes in the left-hand-side of the `tr` operator, `S_do_trans_invmap` can overflow the destination pointer `d`.    $ perl -e '$_ = "\x{FF}" x 1000000; tr/\xFF/\x{100}/;'    Segmentation fault (core dumped) It is believed that this vulnerability can enable Denial of Service and possibly Code Execution attacks on platforms that lack sufficient defenses.

Affected products

• Perl Perl: from 5.33.1, before 5.38.4 (fixed in 5.38.4); from 5.39.0, before 5.40.2 (fixed in 5.40.2); from 5.41.0, up to and including 5.41.10

Published 2025-04-13. Last modified 2026-06-17.