Unauthenticated service interruption via null pointer dereference
Published May 9, 2023 · Updated Jul 10, 2025
A NULL pointer dereference in Windows PGM allows remote attackers to interrupt affected Windows systems with crafted network traffic. The PGM implementation dereferences a null pointer while processing attacker-controlled protocol input; Microsoft has not disclosed the specific field or function. No authentication or user interaction is required, and the published consequence is availability loss rather than code execution or data access.
Summary
What happened
A NULL pointer dereference in Windows PGM allows remote attackers to interrupt affected Windows systems with crafted network traffic. The PGM implementation dereferences a null pointer while processing attacker-controlled protocol input; Microsoft has not disclosed the specific field or function. No authentication or user interaction is required, and the published consequence is availability loss rather than code execution or data access.
The record
- CVE
- CVE-2023-24940
- Published
- May 9, 2023
- Updated
- Jul 10, 2025
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- CWE-476, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 9, 2023CVE publishedPublication date reported by the CVE source.
- Jul 10, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.10240.0 <10.0.10240.19926
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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