CVE-2026-31642

Technical Description

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

rxrpc: Fix call removal to use RCU safe deletion

Fix rxrpc call removal from the rxnet->calls list to use list_del_rcu()

rather than list_del_init() to prevent stuffing up reading

/proc/net/rxrpc/calls from potentially getting into an infinite loop.

This, however, means that list_empty() no longer works on an entry that's

been deleted from the list, making it harder to detect prior deletion. Fix

this by:

Firstly, make rxrpc_destroy_all_calls() only dump the first ten calls that

are unexpectedly still on the list. Limiting the number of steps means

there's no need to call cond_resched() or to remove calls from the list

here, thereby eliminating the need for rxrpc_put_call() to check for that.

rxrpc_put_call() can then be fixed to unconditionally delete the call from

the list as it is the only place that the deletion occurs.

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected Products

References