See https://security-tracker.debian.org/tracker/CVE-2022-34918 and/or https://www.randorisec.fr/crack-linux-firewall/. It allows escalation of privileges.
Several other vulnerabilities have also been recently fixed in the kernel of Debian Bullseye: https://www.debian.org/security/2022/dsa-5191
The current 5.10.105-olimex kernel (provided by Olimex in its images and apt repo) is most probably affected too.
Please provide a kernel upgrade to fix these security issues