Improperly Implemented Security Check for Standard Affecting openshell package, versions <0:0.1.2-0.2.hum1


Severity

Recommended
0.0
medium
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.14% (3rd percentile)

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  • Snyk IDSNYK-RHEL10-OPENSHELL-20292529
  • published30 Sept 2026
  • disclosed29 Sept 2026

Introduced: 29 Sep 2026

NewCVE-2026-102824  (opens in a new tab)
CWE-358  (opens in a new tab)

How to fix?

Upgrade RHEL:10 openshell to version 0:0.1.2-0.2.hum1 or higher.
This issue was patched in RHSA-2026:74586.

NVD Description

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

Russh is a Rust SSH client and server library. Prior to 0.63.0, the hybrid ML-KEM 768 and X25519 implementation in russh/src/kex/hybrid_mlkem.rs accepts an all-zero 32-byte peer X25519 public key in both server_dh and compute_shared_secret, forcing the X25519 contribution to the combined shared secret to zero. A malicious SSH peer can therefore make the combined secret depend only on ML-KEM, defeating the hybrid exchange's intended fallback protection if ML-KEM is later weakened. This issue is fixed in version 0.63.0.

CVSS Base Scores

version 3.1