CVE-2026-31417

In the Linux kernel, the following vulnerability has been resolved:

net/x25: Fix overflow when accumulating packets

Add a check to ensure that `x25_sock.fraglen` does not overflow.

The `fraglen` also needs to be resetted when purging `fragment_queue` in
`x25_clear_queues()`.

More information : https://git.kernel.org/stable/c/1734bd85c5e0a7a801295b729efb56b009cb8fc3