This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-56862 →
DEBIAN-CVE-2026-56862
Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a res...
Original description
The description as published by the source.
Handshake messages, such as KeyUpdate, are always considered as state-advancing, regardless of whether a handshake has been completed or not. As a result, a malicious client can keep sending KeyUpdate messages to force the server to keep performing key derivation operations indefinitely.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:12
golang-1.19
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
golang-1.24
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
golang-1.26
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.26.6-1"}]}]
Debian:14
golang-1.27
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.27~rc3-1"}]}]
References
- advisory security-tracker.debian.org