CVE-2026-56862 Affecting yggdrasil package, versions <0:0.4.9.2-1.el10_2.3


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.57% (45th percentile)

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  • Snyk IDSNYK-ALMALINUX10-YGGDRASIL-20056678
  • published23 Sept 2026
  • disclosed23 Sept 2026

Introduced: 23 Sep 2026

CVE-2026-56862  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:10 yggdrasil to version 0:0.4.9.2-1.el10_2.3 or higher.
This issue was patched in ALSA-2026:69308.

NVD Description

Note: Versions mentioned in the description apply only to the upstream yggdrasil package and not the yggdrasil package as distributed by AlmaLinux. See How to fix? for AlmaLinux:10 relevant fixed versions and status.

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.

References

CVSS Base Scores

version 3.1