VYPR
Medium severity5.9OSV Advisory· Published May 30, 2025· Updated Apr 18, 2026

CVE-2025-40909

CVE-2025-40909

Description

Perl threads have a working directory race condition where file operations may target unintended paths.

If a directory handle is open at thread creation, the process-wide current working directory is temporarily changed in order to clone that handle for the new thread, which is visible from any third (or more) thread already running.

This may lead to unintended operations such as loading code or accessing files from unexpected locations, which a local attacker may be able to exploit.

The bug was introduced in commit 11a11ecf4bea72b17d250cfb43c897be1341861e and released in Perl version 5.13.6

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

251

Patches

Vulnerability mechanics

References

18

News mentions

0

No linked articles in our index yet.