Fragnesia is a separate bug from Dirty Frag, not a re-announcement. It is, however, in the same XFRM/ESP class and the immediate mitigation is identical. Customers who have already applied the Dirty Frag mitigation need no further action until patched kernels are released.
Apply this mitigation now Until a patched kernel or KernelCare livepatch is installed, blacklist the esp4, esp6, and rxrpc modules so they cannot be loaded, and unload them if already present: sudo sh -c "printf 'install esp4 /bin/false\ninstall esp6 /bin/false\ninstall rxrpc /bin/false\n' > /etc/modprobe.d/dirtyfrag.conf; rmmod esp4 esp6 rxrpc 2>/dev/null; true" If you already applied this exact mitigation for Dirty Frag, no further action is required. The file already exists and Fragnesia is blocked by the same rule.