https://ubuntu.com/security/CVE-2024-1086
There's a super long list there, but most everything has been updated or superceded.
The standard (updated) kernels are:
* Focal: 5.4.0-174.193
* Jammy: 5.15.0-101.111
* Mantic: 6.5.0-26.26
And if you haven't updated, apt-get update && apt-get dist-upgrade.