CVE-2025-40909
Perl threads have a working directory race condition where file operations may target unintended paths
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Perl threads have a working directory race condition where file operations may target unintended paths
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
Reserved 2025-04-16 | Published 2025-05-30 | Updated 2025-06-03 | Assigner CPANSecCWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Vincent Lefevre
github.com/...918bfff86ca8d6d4e4ec5b30994451e0bd74aba9.patch
www.openwall.com/lists/oss-security/2025/05/22/2
github.com/Perl/perl5/issues/23010
bugs.debian.org/cgi-bin/bugreport.cgi?bug=1098226
github.com/Perl/perl5/issues/10387
perldoc.perl.org/5.14.0/perl5136delta
github.com/...ommit/11a11ecf4bea72b17d250cfb43c897be1341861e
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