CVE-2023-4813 — Glibc: potential use-after-free in gaih_inet()

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

• Documented patch — bugzilla.redhat.com (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

1. Identify exposed assets running the affected vendor/product/version combinations (Fedoraproject Fedora, Gnu Glibc, Netapp Active Iq Unified Manager…).
2. The attack is network-based and needs no privileges: restrict exposure (ACLs, VPN, WAF) until patched.
3. Apply the fixed version or the patch documented under Remediation.
4. Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-416 · Use After Free

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

• Prioritize edge telemetry for the network-reachable component (proxy, WAF, IDS/IPS).
• Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.

Timeline

What happened to this CVE, newest first.

• 2026
• Affected products added · red hat/red hat enterprise linux 8, red hat/red hat enterprise linux 8.6 extended update support, red hat/red hat enterp
  Oct 14, 2026 · CVE Program (cve.org) e CISA ADP
• Record published
  Oct 14, 2026
• Fix documented
  Oct 14, 2026 · NIST National Vulnerability Database
• Affected products added · gnu/glibc, redhat/enterprise linux, redhat/enterprise linux eus, redhat/enterprise linux for ibm z systems eus s390x, re
  Oct 14, 2026 · NIST National Vulnerability Database
• CVSS changed · 5.9
  Oct 14, 2026 · NIST National Vulnerability Database
• Source status changed · → Modified
  Oct 14, 2026 · NIST National Vulnerability Database
• Record created in this database
  Oct 14, 2026 · Alertas do Telegram
• 2023
• CVE published
  Sep 12, 2023 · redhat

Source activity

Repeated readings are counted rather than listed.

• 2× References added · Oct 14, 2026 – Oct 14, 2026
• 1× Official description updated · Oct 14, 2026 – Oct 14, 2026

References

12 on the record

• bugzilla.redhat.com/show_bug.cgi
  Issue Tracking, Patch, Third Party Advisory, issue-tracking, x_refsource_REDHAT, NIST National Vulnerability Database
• access.redhat.com/errata/RHSA-2023:7409
  Third Party Advisory, vendor-advisory, x_refsource_REDHAT, NIST National Vulnerability Database
• github.com/advisories/GHSA-qx6j-g797-jg9r
  GitHub Security Advisories
• www.openwall.com/lists/oss-security/2023/10/03/8
  NIST National Vulnerability Database
• cert-portal.siemens.com/productcert/html/ssa-398330.html
  NIST National Vulnerability Database
• access.redhat.com/errata/RHSA-2023:5453
  Third Party Advisory, vendor-advisory, x_refsource_REDHAT, NIST National Vulnerability Database
• security.netapp.com/advisory/ntap-20231110-0003
  GitHub Security Advisories
• access.redhat.com/security/cve/CVE-2023-4813
  Third Party Advisory, vdb-entry, x_refsource_REDHAT, NIST National Vulnerability Database
• nvd.nist.gov/vuln/detail/CVE-2023-4813
  GitHub Security Advisories
• access.redhat.com/errata/RHSA-2023:5455
  Third Party Advisory, vendor-advisory, x_refsource_REDHAT, NIST National Vulnerability Database
• access.redhat.com/errata/RHBA-2024:2413
  vendor-advisory, x_refsource_REDHAT, NIST National Vulnerability Database
• security.netapp.com/advisory/ntap-20231110-0003/
  NIST National Vulnerability Database

Elsewhere on this site

Related CVEs (same products)

• Medium CVE-2026-110924 Openssh: openssh: gssapi delegated credentials can be stored after a failed authentication 6h
• Medium CVE-2026-110927 Openssh: openssh: a compressed payload can expand past the maximum packet size 6h
• Medium CVE-2026-110923 Openssh: openssh: sftp can write outside the destination directory from a server-supplied path 14h
• Medium CVE-2026-110926 Openssh: openssh: shared lz77 compression dictionary leaks plaintext across channels 14h
• Medium CVE-2026-110925 Openssh: openssh: '$' and '\' in a command-line username expand through %u 14h
• Medium CVE-2026-86847 Dpdk: dpdk: guest can trigger infinite loop in vhost-crypto writeback chain cleanup 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

• No CISA SSVC assessment.
• No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
• No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
• No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2023-4813 is "Glibc: potential use-after-free in gaih_inet()", rated Medium. It affects Fedora (Fedoraproject); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 5.9 describes technical severity. EPSS 1.93% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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