CVE-2026-74282

CVE CVE-2026-74282EUVD EUVD-2026-59429Published 2026-08-15T05:57:52.000ZLast changed 2026-08-17T05:45:23.000ZCVSS 7.5

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux 10724cc7bb7832b482df049c20fd824d928c5eaa <47ed873e4ceda34098bd46d8e96b4bb13cad3a04; patch: 5.10.261; 10724cc7bb7832b482df049c20fd824d928c5eaa <3cfa3d8e0dc167850edeb5bf5a07757db83fd54e; 10724cc7bb7832b482df049c20fd824d928c5eaa <1e2c956745777e6ffdee7f30da5935741c03ee1e; patch: 0; patch: 7.2; patch: 6.1.178; patch: 7.1.5; patch: 6.18.40; 10724cc7bb7832b482df049c20fd824d928c5eaa <b44bebdd32c9ff66ee2aebfc317ced44bedd9335; patch: 5.15.212; patch: 6.6.145; 10724cc7bb7832b482df049c20fd824d928c5eaa <96f91b8ae1a489b3eca137e7acf42cf985fb8939; patch: 6.12.97; 4.7; 10724cc7bb7832b482df049c20fd824d928c5eaa <67e55b054bf8025658dc0e255057f2a6236416bd; 10724cc7bb7832b482df049c20fd824d928c5eaa <3388145d258cf2c4c98278e3987296007d30672e; 10724cc7bb7832b482df049c20fd824d928c5eaa <ab3e10b44ba5411779aac7afd2477917dd77750f

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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