Answer in brief
CVE-2026-74282 records a High severity (CVSS 7.5) vulnerability in tipc: prevent snt_unacked underflow on CONN_ACK. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=10724cc7bb7832b482df049c20fd824d928c5eaa <3388145d258cf2c4c98278e3987296007d30672e || >=10724cc7bb7832b482df049c20fd824d928c5eaa <67e55b054bf8025658dc0e255057f2a6236416bd || >=10724cc7bb7832b482df049c20fd824d928c5eaa <96f91b8ae1a489b3eca137e7acf42cf985fb8939 || >=10724cc7bb7832b482df049c20fd824d928c5eaa <47ed873e4ceda34098bd46d8e96b4bb13cad3a04 || >=10724cc7bb7832b482df049c20fd824d928c5eaa <b44bebdd32c9ff66ee2aebfc317ced44bedd9335 || >=10724cc7bb7832b482df049c20fd824d928c5eaa <3cfa3d8e0dc167850edeb5bf5a07757db83fd54e || >=10724cc7bb7832b482df049c20fd824d928c5eaa <1e2c956745777e6ffdee7f30da5935741c03ee1e || >=10724cc7bb7832b482df049c20fd824d928c5eaa <ab3e10b44ba5411779aac7afd2477917dd77750f | 3388145d258cf2c4c98278e3987296007d30672e, 67e55b054bf8025658dc0e255057f2a6236416bd, 96f91b8ae1a489b3eca137e7acf42cf985fb8939, 47ed873e4ceda34098bd46d8e96b4bb13cad3a04, b44bebdd32c9ff66ee2aebfc317ced44bedd9335, 3cfa3d8e0dc167850edeb5bf5a07757db83fd54e, 1e2c956745777e6ffdee7f30da5935741c03ee1e, ab3e10b44ba5411779aac7afd2477917dd77750f |
| Linux/Linuxgeneric | 4.7 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
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.
Quoted source text, attributed separately from HOL analysis.