Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 10724cc7bb7832b482df049c20fd824d928c5eaa before 3388145d258cf2c4c98278e3987296007d30672e; affected 10724cc7bb7832b482df049c20fd824d928c5eaa before 67e55b054bf8025658dc0e255057f2a6236416bd; affected 10724cc7bb7832b482df049c20fd824d928c5eaa before 96f91b8ae1a489b3eca137e7acf42cf985fb8939; affected 10724cc7bb7832b482df049c20fd824d928c5eaa before 47ed873e4ceda34098bd46d8e96b4bb13cad3a04; affected 10724cc7bb7832b482df049c20fd824d928c5eaa before b44bebdd32c9ff66ee2aebfc317ced44bedd9335; affected 10724cc7bb7832b482df049c20fd824d928c5eaa before 3cfa3d8e0dc167850edeb5bf5a07757db83fd54e; affected 10724cc7bb7832b482df049c20fd824d928c5eaa before 1e2c956745777e6ffdee7f30da5935741c03ee1e; affected 10724cc7bb7832b482df049c20fd824d928c5eaa before ab3e10b44ba5411779aac7afd2477917dd77750f |
| Linux / Linux | affected 4.7; unaffected 0 before 4.7; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/3388145d258cf2c4c98278e3987296007d30672e
- https://git.kernel.org/stable/c/67e55b054bf8025658dc0e255057f2a6236416bd
- https://git.kernel.org/stable/c/96f91b8ae1a489b3eca137e7acf42cf985fb8939
- https://git.kernel.org/stable/c/47ed873e4ceda34098bd46d8e96b4bb13cad3a04
- https://git.kernel.org/stable/c/b44bebdd32c9ff66ee2aebfc317ced44bedd9335
- https://git.kernel.org/stable/c/3cfa3d8e0dc167850edeb5bf5a07757db83fd54e
- https://git.kernel.org/stable/c/1e2c956745777e6ffdee7f30da5935741c03ee1e
- https://git.kernel.org/stable/c/ab3e10b44ba5411779aac7afd2477917dd77750f
ADP enrichment
No English description supplied.
No references supplied.