PHP on Windows: Reserved Device Names Are Not Rejected Before File/Stream I/O which can cause DoS

Why this deserves its current priority

CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Affected scope and exposure questions

The current feed maps PHP Group/PHP (generic). Check affected ranges and fixed versions before updating.

Recommended response

1. 1Check inventory. Check lockfiles and deployed manifests for PHP Group/PHP.
2. 2Review the reported fix. Update PHP Group/PHP to 8.2.34 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

1. Published upstream

   Sep 25, 2026

   Evidence: source:cvelist:source_dates:source-dates:record

2. Source modified

   Sep 25, 2026

   Evidence: source:cvelist:source_dates:source-dates:record

3. First seen by HOL

   Sep 25, 2026

Sources and claim methodology

• GitHub security advisorygithub.com

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