High 7.5Published Sep 25, 2023

CVE-2023-5156Glibc: dos due to memory leak in getaddrinfo.c

Updated under an hour ago (Oct 26, 2026, 3:50 PM ET)

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It affects Red Hat Enterprise Linux 6 and 4 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Red Hat Enterprise Linux 6

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-401
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

Red Hat Red Hat Enterprise Linux 6 redhat:enterprise_linux	6	CNA record
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name)	from V3.1.0 before V3.1.5	CISA ADP
gnu glibc gnu:glibc	from 2.34 before 2.39	NVD
redhat enterprise_linux redhat:enterprise_linux	8.0; 9.0	NVD

References

References

https://access.redhat.com/security/cve/CVE-2023-5156	vdb-entry, x-refsource-redhat, third-party-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2240541	issue-tracking, x-refsource-redhat, patch
https://sourceware.org/bugzilla/show_bug.cgi?id=30884	issue-tracking, patch
https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=ec6b95c3303c700eb89eebeda2d7264cc184a796	mailing-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://security.gentoo.org/glsa/202402-01
https://cert-portal.siemens.com/productcert/html/ssa-398330.html
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.