CVE-2026-78662

high

Description

Previously, a channel registered in the mux's chanList is not usable until it is established. A malicious peer was able flood the channel's incomingRequests, deadlocking the entire connection. Now, we add an atomic established state, set when a channel becomes usable. Until such a time, handlePacket drops every packet other than the open confirmation/failure, without blocking and without tearing down the connection.

References

https://pkg.go.dev/vuln/GO-2026-6354

https://groups.google.com/g/golang-announce/c/1y3fb2np35U

https://go.dev/issue/81316

https://go.dev/cl/826504

Details

Source: Mitre, NVD

Published: 2026-09-02

Updated: 2026-09-04

Risk Information

CVSS v2

Base Score: 5

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Severity: High

EPSS

EPSS: 0.00171