A flaw was found 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.
https://bugzilla.redhat.com/show_bug.cgi?id=2237798
https://access.redhat.com/security/cve/CVE-2023-4813
https://access.redhat.com/errata/RHSA-2023:7409