CVE-2026-106585 Denial of service in OpenSSH
Attackers can cause denial of service in OpenSSH by sending highly compressed data that exceeds maximum packet length limits during decompression.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-106585?
CVE-2026-106585 is a medium-severity denial of service vulnerability in OpenSSH, published on 6 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-409
Which versions are affected by CVE-2026-106585?
It affects 1 product.
Products include OpenSSH.
How do I fix CVE-2026-106585?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-106585 being exploited?
There is no known exploitation of CVE-2026-106585 in the wild and no public exploit code.
Other vulnerabilities in OpenSSH
Sources
Also known as AZL-106691, BELL-CVE-2026-106585, CLSA-2026-1791893106, CVE-2026-110927, DEBIAN-CVE-2026-106585, ECHO-3d82-9b69-5ec8 and 2 more.