Improper locking in PostgreSQL - CVE-2026-116322
Published: November 12, 2026
Vulnerability identifier: #VU166114
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-116322
CWE-ID: CWE-667
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 triggering a server restart.
The vulnerability exists due to improper locking in PostgreSQL startup processing when handling pre-authentication cancel requests. A remote attacker can arrange for authentication_timeout to expire while cancel handling holds a spinlock, leaving the lock held and triggering a server restart.
Affected software
PostgreSQL
How to mitigate CVE-2026-116322
Install security update from vendor's website.
PostgreSQL - update to 18.7