Improper Validation of Specified Quantity in Input in OpenSSH - CVE-2026-106585
Published: October 28, 2026
Vulnerability identifier: #VU158344
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-106585
CWE-ID: CWE-1284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to potentially cause a denial of service through oversized decompressed SSH packets.
The vulnerability exists due to insufficient validation of decompressed packet length in ssh and sshd when processing compressed SSH payloads. A remote user can supply a compressed payload that expands beyond the maximum supported packet length to potentially exhaust resources or disrupt packet processing.
Affected software
OpenSSH
Fedora
openssh
Fedora
openssh
How to mitigate CVE-2026-106585
Install security update from vendor's website.
OpenSSH - update to 10.6p1
openssh - addressed in versions 10.0p1-14.fc43, 10.2p1-16.fc44
openssh - addressed in versions 10.0p1-14.fc43, 10.2p1-16.fc44