The OPENSSL_LH_flush() function, which empties a hash table, contains a bug that breaks reuse of the memory occuppied by the removed hash table entries. This function is used when decoding certificates or keys. If a long lived process periodically decodes certificates or keys its memory usage will expand without bounds and the process might be terminated by the operating system causing a denial of service. Also traversing the empty hash table entries will take increasingly more time. Typically such long lived processes might be TLS clients or TLS servers configured to accept client certificate authentication. The function was added in the OpenSSL 3.0 version thus older releases are not affected by the issue. Fixed in OpenSSL 3.0.3 (Affected 3.0.0,3.0.1,3.0.2). https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=64c85430f95200b6b51fe9475bd5203f7c19daf1 https://www.openssl.org/news/secadv/20220503.txt
Created openssl3 tracking bugs for this issue: Affects: epel-8 [bug 2089474]
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2022-1473
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2022:6224 https://access.redhat.com/errata/RHSA-2022:6224