A NULL pointer dereference flaw was found in the Linux kernel’s Amateur Radio AX.25 protocol functionality in the way a user connects with the protocol. This flaw allows a local user to crash the system.
https://www.openwall.com/lists/oss-security/2022/04/02/4
https://github.com/torvalds/linux/commit/fc6d01ff9ef03b66d4a3a23b46fc3c3d8cf92009
https://github.com/torvalds/linux/commit/82e31755e55fbcea6a9dfaae5fe4860ade17cbc0