NULL pointer dereference in OpenSSH - #VU158348
Published: October 28, 2026
Vulnerability identifier: #VU158348
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-476
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service by crashing the SFTP client.
The vulnerability exists due to a null pointer dereference in sftp when handling certain failed stat or lstat operations reported by a server. A remote attacker can operate a malicious server that returns an affected failure response to terminate the connected client.
Affected software
OpenSSH
Remediation
Install security update from vendor's website.
OpenSSH - update to 10.6p1