CVE-2025-40909
- Source
- https://cve.org/CVERecord?id=CVE-2025-40909
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-40909.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-40909
- Downstream
- Related
- Published
- 2025-05-30T13:15:22.350Z
- Modified
- 2026-04-11T01:34:46.602719Z
- Severity
-
- 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
- Summary
- [none]
- Details
-
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
-
- http://www.openwall.com/lists/oss-security/2025/06/02/7
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1098226
- https://perldoc.perl.org/5.14.0/perl5136delta#Directory-handles-not-copied-to-threads
- https://www.openwall.com/lists/oss-security/2025/05/22/2
- http://seclists.org/fulldisclosure/2025/Sep/55
- http://www.openwall.com/lists/oss-security/2025/05/23/1
- http://www.openwall.com/lists/oss-security/2025/05/30/4
- http://www.openwall.com/lists/oss-security/2025/06/02/5
- http://www.openwall.com/lists/oss-security/2025/06/03/1
- http://seclists.org/fulldisclosure/2025/Sep/53
- http://www.openwall.com/lists/oss-security/2025/06/02/2
- http://seclists.org/fulldisclosure/2025/Sep/54
- http://www.openwall.com/lists/oss-security/2025/06/02/6
- https://github.com/Perl/perl5/issues/10387
- https://github.com/Perl/perl5/issues/23010
- https://github.com/Perl/perl5/commit/11a11ecf4bea72b17d250cfb43c897be1341861e
- https://github.com/Perl/perl5/commit/918bfff86ca8d6d4e4ec5b30994451e0bd74aba9.patch
Affected packages
Git / github.com/perl/perl5
Affected ranges
- Type
- GIT
- Repo
- https://github.com/perl/perl5
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
- Type
- GIT
- Repo
- https://github.com/perl/perl5
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
Affected versions
Other
GitLive-blead
perl-5a2
perl-5a9
if-0.*
if-0.0603
if-0.0604
if-0.0605
perl-1.*
perl-1.0
perl-2.*
perl-2.0
perl-3.*
perl-3.000
perl-3.044
perl-4.*
perl-4.0.00
perl-4.0.36
perl-5.*
perl-5.000
perl-5.000o
perl-5.001
perl-5.001n
perl-5.002
perl-5.002_01
perl-5.003
perl-5.005
perl-5.6.0
perl-5.7.0
perl-5.7.1
perl-5.7.2
perl-5.7.3
perl-5.8.0
perl-5.9.0
perl-5.9.1
perl-5.9.2
perl-5.9.3
perl-5.9.4
perl-5.9.5
v5.*
v5.10.0
v5.11.0
v5.11.1
v5.11.3
v5.11.4
v5.11.5
v5.12.0
v5.12.0-RC0
v5.12.0-RC1
v5.12.0-RC2
v5.12.0-RC3
v5.12.0-RC4
v5.12.0-RC5
v5.13.0
v5.13.1
v5.13.10
v5.13.11
v5.13.2
v5.13.3
v5.13.4
v5.13.5
v5.13.6
v5.13.7
v5.13.8
v5.13.9
v5.14.0
v5.14.0-RC1
v5.14.0-RC2
v5.14.0-RC3
v5.15.0
v5.15.1
v5.15.2
v5.15.3
v5.15.4
v5.15.5
v5.15.9
v5.16.0
v5.16.0-RC1
v5.16.0-RC2
v5.17.0
v5.17.2
v5.17.4
v5.17.6
v5.17.7
v5.17.7.0
v5.17.8
v5.17.9
v5.18.0
v5.18.0-RC1
v5.18.0-RC2
v5.18.0-RC3
v5.18.0-RC4
v5.19.0
v5.19.1
v5.19.11
v5.19.2
v5.19.3
v5.19.5
v5.19.7
v5.20.0
v5.20.0-RC1
v5.21.0
v5.21.1
v5.21.10
v5.21.11
v5.21.4
v5.21.5
v5.21.6
v5.21.8
v5.21.9
v5.22.0
v5.22.0-RC1
v5.22.0-RC2
v5.23.0
v5.23.1
v5.23.2
v5.23.3
v5.23.4
v5.23.6
v5.23.7
v5.24.0
v5.24.0-RC1
v5.24.0-RC2
v5.24.0-RC3
v5.24.0-RC4
v5.24.0-RC5
v5.25.0
v5.25.11
v5.25.2
v5.25.3
v5.25.4
v5.25.5
v5.25.7
v5.25.9
v5.26.0
v5.26.0-RC2
v5.27.0
v5.27.10
v5.27.11
v5.27.3
v5.27.5
v5.27.6
v5.27.7
v5.27.8
v5.28.0
v5.28.0-RC1
v5.28.0-RC2
v5.28.0-RC3
v5.28.0-RC4
v5.29.0
v5.29.1
v5.29.10
v5.29.5
v5.29.6
v5.29.7
v5.29.8
v5.29.9
v5.30.0
v5.30.0-RC1
v5.30.0-RC2
v5.31.0
v5.31.1
v5.31.11
v5.31.2
v5.31.3
v5.31.4
v5.31.5
v5.31.7
v5.32.0
v5.32.0-RC1
v5.33.0
v5.33.1
v5.33.2
v5.33.3
v5.33.4
v5.33.7
v5.33.8
v5.33.9
v5.34.0
v5.34.0-RC1
v5.34.0-RC2
v5.35.0
v5.35.10
v5.35.11
v5.35.3
v5.35.5
v5.35.6
v5.35.8
v5.35.9
v5.36.0
v5.36.0-RC3
v5.37.0
v5.37.1
v5.37.10
v5.37.11
v5.37.2
v5.37.3
v5.37.4
v5.37.5
v5.37.6
v5.37.7
v5.37.9
v5.38.0
v5.38.0-RC1
v5.38.0-RC2
v5.39.0
v5.39.1
v5.39.3
v5.39.4
v5.39.5
v5.39.7
v5.39.8
v5.40.0
v5.40.0-RC1
v5.40.0-RC2
v5.41.0
v5.41.1
v5.41.10
v5.41.11
v5.41.12
v5.41.2
v5.41.3
v5.41.4
v5.41.5
v5.41.7
v5.41.8
v5.41.9
Database specific
source
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-40909.json"
vanir_signatures_modified
"2026-04-11T01:34:46Z"
vanir_signatures
[
{
"deprecated": false,
"signature_version": "v1",
"signature_type": "Line",
"source": "https://github.com/perl/perl5/commit/918bfff86ca8d6d4e4ec5b30994451e0bd74aba9",
"digest": {
"threshold": 0.9,
"line_hashes": [
"134989881791484765225454295100888486938",
"307762351235177742618874279934252071339",
"280784363888831605331937931425797945453",
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"336390951612205493687436673653501030227",
"165739606322193962004516588743938127675",
"242783520639934835081870154429138894941",
"127780945955950790638035405584626054017",
"121085637768858710249549333997974105108",
"308111053058734644735903452184557604125",
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"303588880441522416286792930712847582836",
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"109945299454953160178434225138364549758",
"235178788719035438250282608489151064997"
]
},
"id": "CVE-2025-40909-6864ca17",
"target": {
"file": "sv.c"
}
},
{
"deprecated": false,
"signature_version": "v1",
"signature_type": "Line",
"source": "https://github.com/perl/perl5/commit/11a11ecf4bea72b17d250cfb43c897be1341861e",
"digest": {
"threshold": 0.9,
"line_hashes": [
"22034570276518843404193385371009359011",
"247772817705386320678187213730606800195",
"299176583276109461925546512587074458878",
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"108081159071924406914849182561610799254",
"179410232723938575327882954132113718823",
"295081009194112414813087408725233223331",
"288112809098045777714190879625246982720"
]
},
"id": "CVE-2025-40909-6ba9514a",
"target": {
"file": "sv.c"
}
}
]