CVE-2023-5156

HIGH 7.5

Glibc: dos due to memory leak in getaddrinfo.c

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-401
Vendor	red hat
Product	red hat enterprise linux 6
Published	Sep 25, 2023
Last Updated	Dec 18, 2025

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

Red Hat / Red Hat Enterprise Linux 6

All versions affected

Red Hat / Red Hat Enterprise Linux 6

All versions affected

Red Hat / Red Hat Enterprise Linux 7

All versions affected

Red Hat / Red Hat Enterprise Linux 7

All versions affected

Red Hat / Red Hat Enterprise Linux 8

All versions affected

Red Hat / Red Hat Enterprise Linux 9

All versions affected

References

NVD ↗ CVE.org ↗ EPSS Data ↗

access.redhat.com: https://access.redhat.com/security/cve/CVE-2023-5156 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2240541 sourceware.org: https://sourceware.org/bugzilla/show_bug.cgi?id=30884 sourceware.org: https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=ec6b95c3303c700eb89eebeda2d7264cc184a796 openwall.com: http://www.openwall.com/lists/oss-security/2023/10/03/4 openwall.com: http://www.openwall.com/lists/oss-security/2023/10/03/5 openwall.com: http://www.openwall.com/lists/oss-security/2023/10/03/6 openwall.com: http://www.openwall.com/lists/oss-security/2023/10/03/8 security.gentoo.org: https://security.gentoo.org/glsa/202402-01

Credits

Red Hat would like to thank Romain Geissler for reporting this issue.