Disclosure summary
FastCGI fcgi2 (aka fcgi) 2.x through 2.4.4 has an integer overflow (and resultant heap-based buffer overflow) via crafted nameLen or valueLen values in data to the IPC socket. This occurs in ReadParams in fcgiapp.c.
Source-reported weakness categories
CWE-190
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
Microsoft Security Updates (CVRF) · 2025-Jan
Open original source · Updated Aug 12, 2026
FastCGI fcgi2 (aka fcgi) 2.x through 2.4.4 has an integer overflow (and resultant heap-based buffer overflow) via crafted nameLen or valueLen values in data to the IPC socket. This occurs in ReadParams in fcgiapp.c.
Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.
Microsoft maximum product score: 9.3
| Vendor | Product / association | Version / bounds |
|---|---|---|
| Microsoft update guide | cbl2 fcgi 2.4.0-7 on CBL Mariner 2.0 | (MSRC status code 3) |
| Microsoft update guide | azl3 fcgi 2.4.0-7 on Azure Linux 3.0 | (MSRC status code 3) |
| Microsoft update guide | cbl2 fcgi 2.4.0-7 on CBL-Mariner 2.0 | (MSRC status code 3) |
| Microsoft update guide | cbl2 fcgi 2.4.5-1 on CBL Mariner 2.0 | (MSRC status code 3) |
| Microsoft update guide | azl3 fcgi 2.4.5-1 on Azure Linux 3.0 | (MSRC status code 3) |
| Microsoft update guide | cbl2 fcgi 2.4.0-7 on CBL Mariner 2.0 | (MSRC status code 3) |
Vendor remediation references
- CBL-Mariner Releases · build 2.4.5-1 · product IDs 20222-17086, 19226-17084, 19225-21692, 19351-16823, 19352-17084, 19225-17086
- Vendor guidance · product IDs 20222-17086, 19226-17084, 19225-21692, 19351-16823, 19352-17084, 19225-17086
Original records & references
- NIST NVD record
- CVE Program record
- msrc.microsoft.com — Vendor advisory
PUBLISHED 2025-04-25T20:00:00-04:00
MODIFIED 2026-08-12T19:33:40-04:00
INGESTED 2026-10-08T12:50:16-04:00