Improper Handling of Highly Compressed Data (Data Amplification) Affecting openssh package, versions <1:10.2p1-2ubuntu3.8


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.19% (8th percentile)

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  • Snyk IDSNYK-UBUNTU2604-OPENSSH-20561243
  • published14 Oct 2026
  • disclosed6 Oct 2026

Introduced: 6 Oct 2026

NewCVE-2026-106585  (opens in a new tab)
CWE-409  (opens in a new tab)

How to fix?

Upgrade Ubuntu:26.04 openssh to version 1:10.2p1-2ubuntu3.8 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh package and not the openssh package as distributed by Ubuntu. See How to fix? for Ubuntu:26.04 relevant fixed versions and status.

In sshd and ssh in OpenSSH before 10.6, there is no check for whether the maximum packet length is exceeded during decompression of highly compressed data.

CVSS Base Scores

version 3.1