CVE intelligence and bounded remediation

CVE-2026-20808 — Microsoft Windows 11 24H2 security vulnerability

High CVSS 7

Concurrent execution using shared resource with improper synchronization ('race condition') in Printer Association Object allows an authorized attacker to elevate privileges locally.

Severity
High
CVSS
7 (3.1)
Published
2026-01-13
CISA KEV
Not currently listed
Ecosystem
windows/system
Weaknesses
CWE-362

Affected products

  • microsoft / windows_11_24h2
  • microsoft / windows_11_25h2
  • microsoft / windows_server_2022_23h2
  • microsoft / windows_server_2025

Matched remediation archetype

Race condition, TOCTOU, and lifecycle synchronization

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Map concurrent actors, shared state, lock boundaries, signals, callbacks, retries, and check-then-use sequences in the affected path.
  • Determine whether untrusted users can influence timing, object names, filesystem state, or repeated state transitions.
  • Identify clustered and multi-process behavior that repository-local tests may not represent.

Remediate safely

  • Make the sensitive state transition atomic or protect it with a consistently ordered synchronization primitive.
  • Perform authorization and invariant checks on the same authoritative object and transaction used for the operation.
  • Use unique private resources, safe ownership transfer, and idempotent operations; add deterministic concurrency regression tests.

Authoritative sources

Complete CVE record and remediation plan

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