CVE-2023-4813: Glibc: potential use-after-free in gaih_inet()
Vulnerability summary
CVE-2023-4813 is a medium (CVSS 5.9) Use After Free vulnerability in fedoraproject fedora. EPSS estimates a 1.93% chance of exploitation in the next 30 days, higher than 79.9% of scored vulnerabilities.
Not severe (CVSS 5.9, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 5 · Related 3Timeline
- 12-09-2023PublishedVulnerability first disclosed.
- 30-10-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
5 scores · 5 sources · 1 version- OSV · Red hatEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.93%
Chance of exploitation in the next 30 days
Percentile
80%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.93% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat189 products
- enterprise_linux8.0 | 9.0
- enterprise_linux_eus8.8 | 9.2
- enterprise_linux_for_ibm_z_systems_eus_s390x9.2
- enterprise_linux_for_ibm_z_systems_s390x9.2
- enterprise_linux_for_power_little_endian9.2_ppc64le
Netapp6 products
Ubuntu2 products
- eglibcAll versions (No fix recorded)
- glibc< 2.23-0ubuntu11.3+esm5 | < 2.27-3ubuntu1.6+esm1 | < 2.31-0ubuntu9.14 | < 2.35-0ubuntu3.5
Debian1 product
- glibc< 2.36-3
Fedoraproject1 product
- fedoraEOL38
Gnu1 product
- glibc< 2.36
6 vendors · 200 products · Showing 200 of 269
References
36 links- bugzilla.redhat.com/show_bug.cgi?id=2237798Issue TrackingX Refsource REDHATREPORTPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2023/10/03/8X Transferred
- security.netapp.com/advisory/ntap-20231110-0003/X Transferred
