In the Linux kernel through 6.3.1, a use-after-free in Netfilter nf_tables when processing batch requests can be abused to perform arbitrary read and write operations on kernel memory. Unprivileged local users can obtain root privileges. This occurs because anonymous sets are mishandled.
https://www.openwall.com/lists/oss-security/2023/05/08/4
https://www.debian.org/security/2023/dsa-5402
https://security.netapp.com/advisory/ntap-20230616-0002/
https://news.ycombinator.com/item?id=35879660
https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html
https://lists.debian.org/debian-lts-announce/2023/06/msg00008.html
https://github.com/torvalds/linux/commit/c1592a89942e9678f7d9c8030efa777c0d57edab
https://bugzilla.redhat.com/show_bug.cgi?id=2196105
http://www.openwall.com/lists/oss-security/2023/05/15/5
http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html