CVE-2026-116322
Received Received - Intake

PostgreSQL Server Restart via Improper Locking

Publication date: 2026-11-12

Last updated on: 2026-11-12

Assigner: PostgreSQL

Description
Improper locking in PostgreSQL startup processing allows an unauthenticated network client to trigger a server restart, via arranging for authentication_timeout to arrive while it holds a spinlock during cancel handling. Within major version 18, minor versions before PostgreSQL 18.7 are affected. Versions before PostgreSQL 18 are unaffected.

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Meta Information

Published
2026-11-12
Last Modified
2026-11-12
Generated
2026-11-12
AI Q&A
2026-11-12
EPSS Evaluated
N/A
NVD
CVE-2026-116322
EUVD
EUVD-2026-124502

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
postgresql postgresql to 18.7 (exc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-667 The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

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Executive Summary

This vulnerability in PostgreSQL involves improper locking during startup processing. An unauthenticated network client can trigger a server restart by causing the authentication_timeout to expire while holding a spinlock during cancel request handling. It only affects PostgreSQL version 18 with minor versions before 18.7.

Detection Guidance

Check PostgreSQL version with 'psql --version' or 'SELECT version();'. If running PostgreSQL 18.x before 18.7, the system is vulnerable. Monitor server logs for unexpected restarts or authentication timeout errors during cancel handling.

Impact Analysis

This vulnerability could lead to limited availability disruption as it may cause the PostgreSQL server to restart unexpectedly. This could interrupt database services and affect applications relying on the database.

Mitigation Strategies

Upgrade PostgreSQL to version 18.7 or later immediately. Restart the PostgreSQL service after upgrade. Ensure no unauthenticated clients can trigger cancel requests during startup. Review and tighten network access controls.

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