Description

If one side of the TLS connection sends multiple key update messages post-handshake in a single record, the connection can deadlock, causing uncontrolled consumption of resources. This can lead to a denial of service. This only affects TLS 1.3.

Dates

Published: 2026-04-08 · Last Modified: 2026-04-13

References

• https://go.dev/cl/763767
• https://go.dev/issue/78334
• https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU
• https://pkg.go.dev/vuln/GO-2026-4870