CVE-2023-5156

Name: CVE-2023-5156
Creator: NVD / NIST
Published: 2023-09-25T16:15:15.613+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.34%

Last modified Jun 17, 2026

CVE-2023-5156 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A flaw was found in the GNU C Library. A recent fix for CVE-2023-4806 introduced the potential for a memory leak, which may result in an application crash.. EPSS estimates a 1.34% chance of exploitation in the next 30 days.

Description

A flaw was found in the GNU C Library. A recent fix for CVE-2023-4806 introduced the potential for a memory leak, which may result in an application crash.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

1.34%

67.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Gnu	Glibc	>= 2.34, < 2.39
Redhat	Enterprise Linux	8.0
Redhat	Enterprise Linux	9.0

References

https://access.redhat.com/security/cve/CVE-2023-5156Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2240541Issue Tracking, Patch
https://sourceware.org/bugzilla/show_bug.cgi?id=30884Issue Tracking, Patch
https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=ec6b95c3303c700eb89eebeda2d7264cc184a796Mailing List, Patch
http://www.openwall.com/lists/oss-security/2023/10/03/4
http://www.openwall.com/lists/oss-security/2023/10/03/5
http://www.openwall.com/lists/oss-security/2023/10/03/6
http://www.openwall.com/lists/oss-security/2023/10/03/8
https://access.redhat.com/security/cve/CVE-2023-5156Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2240541Issue Tracking, Patch
https://security.gentoo.org/glsa/202402-01
https://sourceware.org/bugzilla/show_bug.cgi?id=30884Issue Tracking, Patch
https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=ec6b95c3303c700eb89eebeda2d7264cc184a796Mailing List, Patch

Timeline

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

Frequently Asked Questions

What is CVE-2023-5156?

A flaw was found in the GNU C Library. A recent fix for CVE-2023-4806 introduced the potential for a memory leak, which may result in an application crash.

How severe is CVE-2023-5156?

CVE-2023-5156 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.34% probability of exploitation in the next 30 days.

How do I fix CVE-2023-5156?

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-2023-5156?

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

Scan your code now

Source: NVD / NIST