CVE-2025-40907

Name	CVE-2025-40907
Description	FCGI versions 0.44 through 0.82, for Perl, include a vulnerable version of the FastCGI fcgi2 (aka fcgi) library. The included FastCGI library is affected by CVE-2025-23016, causing 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	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libfcgi-perl (PTS)	bullseye	0.79+ds-2	fixed
	bookworm	0.82+ds-2	fixed
	sid, trixie	0.82+ds-3	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libfcgi-perl	source	(unstable)	0.79+ds-2

Notes

https://lists.security.metacpan.org/cve-announce/msg/29651740/
Since libfcgi-perl/0.79+ds-1 in experimental libfcgi-perl is repackaged and
uses the system libfcgi system library. Use 0.79+ds-2 as the fixed version.