CVE-2024-3094 in XZ Utils may allow unauthorized access to Linux systems via sshd. Versions 5.6.0 and 5.6.1 of xz libraries contain malicious code.
Debian stable is not affected, but testing, unstable and experimental are. RedHat based distros are affected.
Check for linux updates today.
https://www.helpnetsecurity.com/2024/03/29/cve-2024-3094-linux-backdoor/