CVE - CVE-2025-40909

CVE-ID
CVE-2025-40909	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1098226 URL:https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1098226 MISC:https://github.com/Perl/perl5/commit/11a11ecf4bea72b17d250cfb43c897be1341861e URL:https://github.com/Perl/perl5/commit/11a11ecf4bea72b17d250cfb43c897be1341861e MISC:https://github.com/Perl/perl5/commit/918bfff86ca8d6d4e4ec5b30994451e0bd74aba9.patch URL:https://github.com/Perl/perl5/commit/918bfff86ca8d6d4e4ec5b30994451e0bd74aba9.patch MISC:https://github.com/Perl/perl5/issues/10387 URL:https://github.com/Perl/perl5/issues/10387 MISC:https://github.com/Perl/perl5/issues/23010 URL:https://github.com/Perl/perl5/issues/23010 MISC:https://perldoc.perl.org/5.14.0/perl5136delta#Directory-handles-not-copied-to-threads URL:https://perldoc.perl.org/5.14.0/perl5136delta#Directory-handles-not-copied-to-threads MISC:https://www.openwall.com/lists/oss-security/2025/05/22/2 URL:https://www.openwall.com/lists/oss-security/2025/05/22/2
Assigning CNA
CPAN Security Group
Date Record Created
20250416	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250416)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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