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Vulnerabilities

Vulnerability · CVE-2023-4813

A flaw has been identified in glibc.

Published Sep 12, 2023 · catalog updated Oct 14, 2026 · Red Hat Red Hat Enterprise Linux 8

Check if you run it

No confirmed exploitation is on record for CVE-2023-4813. EPSS is 2.22%. Act only if a listed version of Red Hat Red Hat Enterprise Linux 8 is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
2.22%
Remediation
Advisory link
Affected products
cpe fedoraproject/fedora · cpe gnu/glibc · cpe netapp/active iq unified manager · cpe netapp/h300s firmware · cpe netapp/h500s firmware · cpe redhat/enterprise linux

A flaw has been identified in glibc. In an uncommon situation, the gaih_inet function may use memory that has been freed, resulting in an application crash. This issue is only exploitable when the getaddrinfo function is called and the hosts database in /etc/nsswitch.conf is configured with SUCCESS=continue or SUCCESS=merge.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe fedoraproject/fedora38
  • cpe gnu/glibcversion unspecified
  • cpe netapp/active iq unified managerversion unspecified
  • cpe netapp/h300s firmwareversion unspecified
  • cpe netapp/h500s firmwareversion unspecified
  • cpe redhat/enterprise linux8.0
  • cpe redhat/enterprise linux9.0
  • cpe redhat/enterprise linux eus8.8
  • cpe redhat/enterprise linux eus9.2
  • cpe redhat/enterprise linux for ibm z systems eus s390x9.2
  • cpe redhat/enterprise linux for ibm z systems s390x9.2
  • cpe redhat/enterprise linux for power little endian9.2_ppc64le
  • vendor Red Hat Red Hat Enterprise Linux 8version unspecified
  • vendor Red Hat Red Hat Enterprise Linux 8.6 Extended Update Supportversion unspecified
  • vendor Red Hat Red Hat Enterprise Linux 9version unspecified
  • vendor Red Hat Red Hat Virtualization 4 for Red Hat Enterprise Linux 8version unspecified

How to fix CVE-2023-4813

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2023-4813. EPSS is 2.22%. Act only if a listed version of Red Hat Red Hat Enterprise Linux 8 is installed.

Which versions are affected?

Compare what you have installed with redhat/enterprise linux 8.0; redhat/enterprise linux 9.0; redhat/enterprise linux eus 8.8; redhat/enterprise linux eus 9.2. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-416: Use After Free. EPSS 2.22%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Sep 12, 2023 · NIST NVD

    Detected

    A flaw has been identified in glibc. In an uncommon situation, the gaih_inet function may use memory that has been freed, resulting in an application crash. This issue is only exploitable when the getaddrinfo function is called and the hosts database in /etc/nsswitch.conf is configured with SUCCESS=continue or SUCCESS=merge.

  2. Oct 14, 2026 · NIST NVD

    Updated

    A flaw has been identified in glibc. In an uncommon situation, the gaih_inet function may use memory that has been freed, resulting in an application crash. This issue is only exploitable when the getaddrinfo function is called and the hosts database in /etc/nsswitch.conf is configured with SUCCESS=continue or SUCCESS=merge.

Sources

  • CIRCL Vulnerability LookupVulnerability recordCVE-2023-4813

    A flaw has been identified in glibc. In an uncommon situation, the gaih_inet function may use memory that has been freed, resulting in an application crash. This issue is only exploitable when the getaddrinfo function is called and the hosts database in /etc/nsswitch.conf is conf

    vulnerability.circl.lu
  • CVE.orgVulnerability recordCVE-2023-4813

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2023-4813

    30-day exploitation probability 2.2%

    first.org
  • NIST NVDVulnerability recordCVE-2023-4813

    A flaw has been identified in glibc. In an uncommon situation, the gaih_inet function may use memory that has been freed, resulting in an application crash. This issue is only exploitable when the getaddrinfo function is called and the hosts database in /etc/nsswitch.conf is conf

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 16, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.