CVE-2025-23016
libfcgi - security update
9.3
CRITICAL
CVSS 3.1
EPSS 0.57%
Description
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.
How to fix CVE-2025-23016
To remediate CVE-2025-23016, upgrade the affected package to a fixed version below.
- Debian/libfcgi—upgrade to 2.4.2-2+deb11u1 or later
- —upgrade to 2.4.2-2+deb11u1 or later
Is CVE-2025-23016 being exploited?
Low — EPSS is 0.6%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2.4.2-2+deb11u1
- from 0, < 2.4.2-2+deb11u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.3 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |