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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
5e6ef4f1017c7f844e305283bbd8875af475e2fc to < b8f66447448d6c305a51413a67ec8ed26aa7d1ddaffected5e6ef4f1017c7f844e305283bbd8875af475e2fc to < 0c156aff8a2d4fa0d61db7837641975cf0e5452daffected5e6ef4f1017c7f844e305283bbd8875af475e2fc to < 8299ca146489664e3c0c90a3b8900d8335b1ede4affected5e6ef4f1017c7f844e305283bbd8875af475e2fc to < 9fb09861e2b8d1abfe2efaf260c9f1d30080ea38affected5e6ef4f1017c7f844e305283bbd8875af475e2fc to < 6331f1b24a3e85465f6454e003a3e6c22005a5c5affected
Linux Linux
Default version status: affected
6.2affected0 to < 6.2unaffected6.6.135 to ≤ 6.6.*unaffected6.12.82 to ≤ 6.12.*unaffected6.18.23 to ≤ 6.18.*unaffected6.19.13 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/b8f66447448d6c305a51413a67ec8ed26aa7d1dd ↗
- https://git.kernel.org/stable/c/0c156aff8a2d4fa0d61db7837641975cf0e5452d ↗
- https://git.kernel.org/stable/c/8299ca146489664e3c0c90a3b8900d8335b1ede4 ↗
- https://git.kernel.org/stable/c/9fb09861e2b8d1abfe2efaf260c9f1d30080ea38 ↗
- https://git.kernel.org/stable/c/6331f1b24a3e85465f6454e003a3e6c22005a5c5 ↗