CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's TIPC (Transparent Inter-Process Communication) module, where an unchecked subtraction of the connection acknowledgment count from the send counter can lead to an underflow. This flaw can result in a denial of service by preventing further transmissions on the connection, effectively starving it of data. Organizations utilizing TIPC in their Linux environments should prioritize patching this vulnerability to maintain reliable communication and prevent potential service disruptions.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: tipc: prevent snt_unacked underflow on CONN_ACK tipc_sk_conn_proto_rcv() subtracts the peer-supplied connection ack count from the unsigned 16-bit send counter snt_unacked without checking that it does not exceed the number of messages actually outstanding: tsk->snt_unacked -= msg_conn_ack(hdr); msg_conn_ack() is read straight from a received CONN_MANAGER/CONN_ACK message. If the ack count is larger than snt_unacked, the subtraction wraps to a near-maximum value, leaving tsk_conn_cong() permanently true and starving the connection of further transmits. Validate the ACK count at the start of the CONN_ACK block and drop the message if it acknowledges more messages than are outstanding. A peer (or, for a local connection, the connected peer socket) can otherwise wedge a TIPC connection's send side by sending an oversized connection ack.