CVE-2025-40909: Perl threads have a working directory race condition where file operations may target unintended paths

Published Feb 17, 2025
·
Updated

AirPort. A permissions issue was addressed with additional restrictions.

Other sources

AMD. A buffer overflow was addressed with improved bounds checking.

— Apple

AppKit. The issue was resolved by blocking unsigned services from launching on Intel Macs.

— Apple

Apple Neural Engine. An out-of-bounds access issue was addressed with improved bounds checking.

— Apple

Apple Online Store Kit. A permissions issue was addressed with additional restrictions.

— Apple

AppleMobileFileIntegrity. A downgrade issue was addressed with additional code-signing restrictions.

— Apple

Credit

Rodolphe BRUNETTI@@eisw0lf(Lupus Nova), Csaba Fitzl@@theevilbit(Kandji), Kirin@@Pwnrin, ABC Research s.r.o., Mickey Jin@@patch1t, an anonymous researcher, Nolan Astrein(Kandji), Mickey Jin@@patch1t(Cisco Talos), Kirin@@Pwnrin(Cisco Talos), Claudio Bozzato(Cisco Talos), Francesco Benvenuto(Cisco Talos), Zhongquan Li@@Guluisacat, Bilal Siddiqui, Hossein Lotfi@@hosselot(Trend Micro Zero Day Initiative), Michael Reeves@@IntegralPilot, Noah Gregory (wts.dev), Dawuge(Shuffle Team), Rosyna Keller(Totally Not Malicious Software), Guilherme Rambo(Best Buddy Apps), Yinyi Wu@@_3ndy1(Dawn Security Lab of JD), @@zlluny(Trend Micro Zero Day Initiative), 이동하 (Lee Dong Ha)(SSA Lab), Zhongcheng Li(IES Red Team of ByteDance), Matej Moravec@@MacejkoMoravec, Shantanu Thakur, Wang Yu(Cyberserval), Anonymous(Trend Micro Zero Day Initiative), Jian Lee@@speedyfriend433, Yiğit Can YILMAZ@@yilmazcanyigit, Keisuke Hosoda, Ye Zhang@@VAR10CK(Baidu Security), Viktor Oreshkin, Nathaniel Oh@@calysteon, Gergely Kalman@@gergely_kalman, Hikerell (Loadshine Lab), Rodolphe Brunetti@@eisw0lf(Lupus Nova), LFY@@secsys(Fudan University), CVE-2025-40909, @@zlluny, CVE-2024-27280, KPC(Cisco Talos), @@RenwaX23, Ye Zhang(Baidu Security), pattern-f@@pattern_F_, 정답이 아닌 해답, Kirin@@Pwnrin(Computer Science), Cristian Dinca(Computer Science), Romania, CVE-2025-6965, JZ, Seo Hyun-gyu@@wh1te4ever, Luke Roberts@@rookuu, Ferdous Saljooki@@malwarezoo(Jamf), Justin Elliot Fu, Pyrophoria(GrapheneOS), an anonymous researcher(GrapheneOS), James J Kalafus, Michel Migdal, ken super, Jaydev Ahire, Big Bear, Ignacio Sanmillan@@ulexec, Mike Cardwell(grepular), Bob Lord, Pawel Wylecial(REDTEAM), @@zlluny(Trend Zero Day Initiative), Duy Trần@@khanhduytran0, @@EthanArbuckle, Wojciech Regula(SecuRing), Google's Threat Analysis Group, Minghao Lin@@Y1nKoc, 风 (binaryfmyy), BochengXiang@@Crispr, YingQi Shi@@Mas0nShi, Dora Orak, Mickey Jin@@patch1t(Fudan University), Kirin@@Pwnrin(Fudan University)

Affected Software

8 affected componentsFixes available
debian/perl<=5.40.1-2, <=5.36.0-7+deb12u1, <=5.14.0-1, <=5.40.0-8
Apple macOS Sequoia<15.7
15.7
Apple macOS Sonoma<14.8
14.8
debian/perl<=5.32.1-4+deb11u3, <=5.32.1-4+deb11u4, <=5.36.0-7+deb12u2
5.36.0-7+deb12u35.40.1-65.40.1-7
Apple macOS Tahoe<26
26
Microsoft azl3 perl 5.38.2-509
Patch available
Microsoft cm2 perl 5.34.1-491
Patch available
Microsoft cbl2 perl 5.34.1-491
Patch available

Remediation

Information

Update perl to an unaffected version, or apply the patch provided in the references section.

Event History

Feb 17, 2025
Data Sourced
via Debian·11:33 PM
SeverityAffected Software
May 30, 2025
CVE Published
via MITRE·12:20 PM
Data Sourced
via MITRE·12:20 PM
RemedyDescriptionWeakness
Data Sourced
via Red Hat·01:01 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·01:15 PM
DescriptionSeverityWeakness
Jul 29, 2025
Data Sourced
via Microsoft·07:00 AM
DescriptionSeverityWeakness
Data Sourced
via Microsoft·07:00 AM
Affected Software
Updated
via Microsoft·07:00 AM
Affected Software
Updated
via Microsoft·07:00 AM
DescriptionSeverity
Sep 15, 2025
Data Sourced
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
DescriptionWeakness
Updated
via Apple·12:00 AM
DescriptionWeaknessAffected Software
Updated
via Apple·12:00 AM
Affected Software
Nov 19, 2025
Data Sourced
via Debian·07:18 PM
Description
Jan 30, 2026
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

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Frequently Asked Questions

1

What is the severity of CVE-2025-40909?

The severity of CVE-2025-40909 is categorized as medium due to the race condition in Perl threads that can lead to unintended file operations.

2

How do I fix CVE-2025-40909?

To fix CVE-2025-40909, update Perl to a version beyond 5.40.1-2 or any patched version provided by your distribution.

3

Which versions of Perl are affected by CVE-2025-40909?

CVE-2025-40909 affects Perl versions 5.40.1-2, 5.14.0-1, 5.40.0-8, and 5.36.0-7+deb12u1.

4

What are the potential impacts of CVE-2025-40909?

The potential impacts of CVE-2025-40909 include data corruption or unauthorized access to files due to race conditions in threading.

5

Is CVE-2025-40909 a local or remote vulnerability?

CVE-2025-40909 is primarily considered a local vulnerability as it requires the execution of Perl code on the affected system.

Company

Resources

Contact

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