CVE-2024-50294: rxrpc: Fix missing locking causing hanging calls

Severity: medium (CVSS 4.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-11-19 · updated 2026-08-04
Weakness: CWE-667

Description

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix missing locking causing hanging calls If a call gets aborted (e.g. because kafs saw a signal) between it being queued for connection and the I/O thread picking up the call, the abort will be prioritised over the connection and it will be removed from local->new_client_calls by rxrpc_disconnect_client_call() without a lock being held. This may cause other calls on the list to disappear if a race occurs. Fix this by taking the client_call_lock when removing a call from whatever list its ->wait_link happens to be on.

Affected products

Linux kernel: from 6.2.1 before 6.6.61; from 6.7 before 6.11.8; 6.2, 6.2-rc4, 6.2-rc5, 6.2-rc6, 6.2-rc7, 6.2-rc8 (+6) — fixed in 6.11.8, 6.6.61

How to fix

Upgrade to a fixed version: Linux kernel 6.11.8, 6.6.61. Check the vendor advisory for mitigations.

References

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