{"apiVersion":"1.0","identifier":"CVE-2026-74282","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.","publishedAt":"2026-08-15T06:22:27","lastModifiedAt":"2026-08-17T06:19:21","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74282","cvssScore":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","epssProbability":0.00677,"riskScore":0.8,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74282","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74282","en":"https://www.redsauce.net/en/cves/CVE-2026-74282","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74282","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74282","de":"https://www.redsauce.net/de/cves/CVE-2026-74282","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74282","el":"https://www.redsauce.net/el/cves/CVE-2026-74282"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74282"}}