CVE-2026-74429
HighCVSS 7.5Exploitation Probability (EPSS)
Low risk27th percentile - higher than 27% of all known CVEs
Summary
In the Linux kernel, the rxrpc subsystem fixed an issue with receiving a reply packet before data transmission. The function rxrpc_receiving_reply() did not check if the call had been exposed, which could lead to an oops in rxrpc_rotate_tx_window(). Additionally, the do...while loop was changed to a while loop to handle an empty transmission queue.
Risk Assessment
The vulnerability could cause a system crash (oops) due to improper packet sequencing, potentially leading to service unavailability.
Recommendation
It is recommended to apply the official Linux kernel patch containing this fix as soon as possible.
Original NVD description (English source)
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix the reception of a reply packet before data transmission Fix rxrpc_receiving_reply() to handle the reception of an apparent reply DATA packet before rxrpc has had a chance to send any request DATA packets on a client call by checking to see if the call has been exposed yet by sending the first packet. Without this, rxrpc_rotate_tx_window() might oops. Also fix rxrpc_rotate_tx_window() to handle the Tx queue being empty by changing the do...while loop into a while loop, just in case a call is abnormally terminated by an early reply before the last request packet is transmitted.