It was discovered that when exec'ing from a non-leader thread, armed POSIX CPU timers would be left on a list but freed, leading to a use-after-free.
https://www.openwall.com/lists/oss-security/2022/08/09/7
https://ubuntu.com/security/notices/USN-5567-1
https://ubuntu.com/security/notices/USN-5566-1
https://ubuntu.com/security/notices/USN-5565-1
https://ubuntu.com/security/notices/USN-5564-1
https://lore.kernel.org/lkml/[email protected]/T/#u
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-2585