Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix key reference count leak from call->key When creating a client call in rxrpc_alloc_client_call(), the code obtains a reference to the key. This is never cleaned up and gets leaked when the call is destroyed. Fix this by freeing call->key in rxrpc_destroy_call(). Before the patch, it shows the key reference counter elevated: $ cat /proc/keys | grep afs@54321 1bffe9cd I–Q–i 8053480 4169w 3b010000 1000 1000 rxrpc afs@54321: ka $ After the patch, the invalidated key is removed when the code exits: $ cat /proc/keys | grep afs@54321 $ A flaw was found in the rxrpc subsystem of the Linux kernel. When a client call is created, a reference to a key is obtained but not properly released when the call is destroyed. This oversight leads to a key reference count leak, which can accumulate over time. This resource exhaustion could eventually allow a local attacker to cause a Denial of Service (DoS) by consuming available system resources.Details
KernelCare state
Live-patch status from KernelCare for each operating system.
| Operating system | Status | Covered kernels |
|---|---|---|
| Debian 13 | Planned | — |
| Ubuntu 24.04 | Planned | — |