CVE-2026-31638
Description
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Only put the call ref if one was acquired rxrpc_input_packet_on_conn() can process a to-client packet after the current client call on the channel has already been torn down. In that case chan->call is NULL, rxrpc_try_get_call() returns NULL and there is no reference to drop. The client-side implicit-end error path does not account for that and unconditionally calls rxrpc_put_call(). This turns a protocol error path into a kernel crash instead of rejecting the packet. Only drop the call reference if one was actually acquired. Keep the existing protocol error handling unchanged.
How to fix
- linux linux_kernel6.6.135, 6.12.82, 6.18.23, 6.19.13 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 6.2.1 ≤ v < 6.6.135, 6.7 ≤ v < 6.12.82, 6.13 ≤ v < 6.18.23, 6.19 ≤ v < 6.19.13, 6.2, 7.0 | 6.6.135, 6.12.82, 6.18.23, 6.19.13 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.