Execution with unnecessary privileges in OpenSSH - #VU158347
Published: October 28, 2026
Vulnerability identifier: #VU158347
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-250
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass operating system access controls and perform certain forwarding operations with root privileges.
The vulnerability exists due to unnecessary retention of root privileges in sshd-session when the platform lacks file descriptor passing and requires root privileges for PTY allocation. A remote user can request forwarding operations to make Unix domain socket connections or bind low-numbered TCP ports with privileges unavailable to the logged-in user.
Affected platforms include QNX 6 and SCO OpenServer 5.
Affected software
OpenSSH
Remediation
Install security update from vendor's website.
OpenSSH - update to 10.6p1