CVE-2025-40909
"Perl threads Directory Handle Race Condition Vulnerability"
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
INFO
Published Date :
May 30, 2025, 1:15 p.m.
Last Modified :
May 31, 2025, 1:15 a.m.
Source :
9b29abf9-4ab0-4765-b253-1875cd9b441e
Remotely Exploitable :
No
Impact Score :
3.4
Exploitability Score :
2.5
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-40909.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-40909 vulnerability anywhere in the article.
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Daily CyberSecurity
CVE-2025-40909: Perl Threads Vulnerability Exposes File Operation Race Condition
A newly disclosed vulnerability in Perl’s threading mechanism, tracked as CVE-2025-40909, exposes systems to race conditions involving the working directory, potentially enabling local attackers to ma ... Read more
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Daily CyberSecurity
CVE-2025-48912: Apache Superset Flaw Allows Row-Level Security Bypass via SQL Injection
A serious security vulnerability has been discovered in Apache Superset, a widely used open-source data exploration and visualization platform. The flaw exposes sensitive datasets to unauthorized acce ... Read more
The following table lists the changes that have been made to the
CVE-2025-40909 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by af854a3a-2127-422b-91ae-364da2661108
May. 31, 2025
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2025/05/30/4 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
May. 30, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
May. 30, 2025
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2025/05/23/1 -
New CVE Received by 9b29abf9-4ab0-4765-b253-1875cd9b441e
May. 30, 2025
Action Type Old Value New Value Added 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 Added CWE CWE-362 Added CWE CWE-426 Added Reference https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1098226 Added Reference https://github.com/Perl/perl5/commit/11a11ecf4bea72b17d250cfb43c897be1341861e Added Reference https://github.com/Perl/perl5/commit/918bfff86ca8d6d4e4ec5b30994451e0bd74aba9.patch Added Reference https://github.com/Perl/perl5/issues/10387 Added Reference https://github.com/Perl/perl5/issues/23010 Added Reference https://perldoc.perl.org/5.14.0/perl5136delta#Directory-handles-not-copied-to-threads Added Reference https://www.openwall.com/lists/oss-security/2025/05/22/2
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-40909 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-40909
weaknesses.