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.
Affected products
golang: crypto
References4
- go.dev/issue/81316 Issue TrackingVendor Advisory
- groups.google.com/g/golang-announce/c/1y3fb2np35U Mailing ListVendor Advisory
- pkg.go.dev/vuln/GO-2026-6354 PatchVendor Advisory
- go.dev/cl/826504 Patch
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - EPSS — exploit probability
- 0% percentile: 37 · as of 3 November 2026
- CWE
- CWE-770
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