There are null-ptr-deref vulnerability and use-after-free vulnerability that allow attacker to crash linux kernel by simulating Amateur Radio from user-space of linux. Upstream fix: https://github.com/torvalds/linux/commit/4e0f718daf97d47cf7dec122da1be970f145c809 https://github.com/torvalds/linux/commit/71171ac8eb34ce7fe6b3267dce27c313ab3cb3ac https://github.com/torvalds/linux/commit/7ec02f5ac8a5be5a3f20611731243dc5e1d9ba10
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 2070695]
This was fixed for Fedora with the 5.16.15 stable kernel updates.
https://www.openwall.com/lists/oss-security/2022/04/02/5