CVE-2015-20109

Name: CVE-2015-20109
Creator: NVD / NIST
Published: 2023-06-25T17:15:14.187+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.29%

Last modified Jun 17, 2026

CVE-2015-20109 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. end_pattern (called from internal_fnmatch) in the GNU C Library (aka glibc or libc6) before 2.22 might allow context-dependent attackers to cause a denial of service (application crash), as demonstrated by use of the fnmatch library function with the **(!() pattern. NOTE: this is not the same as CVE-2015-8984; also, some Linux distributions have fixed CVE-2015-8984 but have not fixed this additional fnmatch issue.. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

Description

end_pattern (called from internal_fnmatch) in the GNU C Library (aka glibc or libc6) before 2.22 might allow context-dependent attackers to cause a denial of service (application crash), as demonstrated by use of the fnmatch library function with the **(!() pattern. NOTE: this is not the same as CVE-2015-8984; also, some Linux distributions have fixed CVE-2015-8984 but have not fixed this additional fnmatch issue.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

EPSS Probability

0.29%

20.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions
Gnu	Glibc	< 2.22

References

https://security.netapp.com/advisory/ntap-20230731-0009/
https://sourceware.org/bugzilla/show_bug.cgi?id=18036Exploit, Issue Tracking
https://security.netapp.com/advisory/ntap-20230731-0009/
https://sourceware.org/bugzilla/show_bug.cgi?id=18036Exploit, Issue Tracking

Timeline

Published: Jun 25, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-20109?

How severe is CVE-2015-20109?

CVE-2015-20109 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.

How do I fix CVE-2015-20109?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-20109?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST