Improper Handling of Highly Compressed Data (Data Amplification) Affecting openssh-keycat-debuginfo package, versions <0:9.9p1-16.amzn2023.0.1


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.19% (9th percentile)

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  • Snyk IDSNYK-AMZN2023-OPENSSHKEYCATDEBUGINFO-22103382
  • published31 Oct 2026
  • disclosed6 Oct 2026

Introduced: 6 Oct 2026

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

How to fix?

Upgrade Amazon-Linux:2023 openssh-keycat-debuginfo to version 0:9.9p1-16.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2026-3354.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssh-keycat-debuginfo package and not the openssh-keycat-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 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