CVE-2023-5156

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

1.62% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 75.7% of scored records. A rank, not a probability.

NVD base score

7.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-10-14.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2023-09-25 15:55Z3 YR AGO

Last updated

2026-10-14 21:54Z14 DAYS AGO

Reserved

2023-09-25

Assigning CNA

redhat

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

• CWE-401Missing Release of Memory after Effective LifetimeVariant

Data version

5.2

Document digest

0a99d62bbd3860ffc60c2ac3e5bd24e157aae4e6b47f6c11aa531a46f0840a59

• access.redhat.comhttps://access.redhat.com/security/cve/CVE-2023-5156vdb-entryx_refsource_REDHAT
• bugzilla.redhat.comRHBZ#2240541https://bugzilla.redhat.com/show_bug.cgi?id=2240541issue-trackingx_refsource_REDHAT
• sourceware.orghttps://sourceware.org/bugzilla/show_bug.cgi?id=30884
• sourceware.orghttps://sourceware.org/git/?p=glibc.git;a=commitdiff;h=ec6b95c3303c700eb89eebeda2d7264cc184a796
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/10/03/4
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/10/03/5
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/10/03/6
• www.openwall.comhttp://www.openwall.com/lists/oss-security/2023/10/03/8
• security.gentoo.orghttps://security.gentoo.org/glsa/202402-01
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-831302.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-398330.html