CVE-2024-56406

perl: Perl 5.34, 5.36, 5.38 and 5.40 are vulnerable to a heap buffer overflow when transliterating non-ASCII bytes

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Severity

Important

Red Hat Product Security

7.3

CVSS 3.1

Review impact separately from score.

Published · April 13, 2025

Updated · August 31, 2026

Description

A flaw was found in Perl. This vulnerability allows a heap buffer overflow, which can lead to denial of service and potential arbitrary code execution on platforms that lack sufficient defenses via specially crafted input to the tr/// transliteration operator containing non-ASCII bytes on the left-hand side.

Statement

This vulnerability is rated as an Important vulnerability because a heap buffer overflow vulnerability exists in the tr/// operator causing DoS and arbitrary code execution, which can disrupt system services, background system jobs.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.3
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

CWE-787 · Out-of-bounds Write