CVE catalog

CVE-2025-23016

FastCGI vulnerability

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: Jan 10, 2025, 12:15:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.61% · Oct 25, 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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	libfcgi	sid	`2.4.5-0.1`	fixed
Debian	libfcgi	forky	`2.4.5-0.1`	fixed
Debian	libfcgi	trixie	`2.4.5-0.1`	fixed
Debian	libfcgi	bookworm	`2.4.2-2+deb12u1`	fixed
Ubuntu	libfcgi	noble	`2.4.2-2.1ubuntu0.24.04.1`	fixed
Ubuntu	libfcgi-bin	noble	`2.4.2-2.1ubuntu0.24.04.1`	fixed
Ubuntu	libfcgi-dev	noble	`2.4.2-2.1ubuntu0.24.04.1`	fixed
Ubuntu	libfcgi0t64	noble	`2.4.2-2.1ubuntu0.24.04.1`	fixed
Ubuntu	libfcgi	22.04	`2.4.2-2build1`	vulnerable
Ubuntu	libfcgi	22.04	`2.4.2-2build2`	vulnerable
Ubuntu	libfcgi	22.04	`2.4.2-2ubuntu0.1`	fixed
Ubuntu	libfcgi	24.04	`2.4.2-2build2`	vulnerable
Ubuntu	libfcgi	24.04	`2.4.2-2.1`	vulnerable
Ubuntu	libfcgi	24.04	`2.4.2-2.1build1`	vulnerable
Ubuntu	libfcgi	24.04	`2.4.2-2.1ubuntu0.24.04.1`	fixed
Ubuntu	libfcgi	16.04	`2.4.0-8.3`	vulnerable
Ubuntu	libfcgi	18.04	`2.4.0-8.4`	vulnerable
Ubuntu	libfcgi	18.04	`2.4.0-10`	vulnerable
Ubuntu	libfcgi	20.04	`2.4.0-10`	vulnerable
Ubuntu	libfcgi	20.04	`2.4.0-10build1`	vulnerable
Ubuntu	libfcgi	22.04	`2.4.2-2build1`	vulnerable
Ubuntu	libfcgi	22.04	`2.4.2-2build2`	vulnerable
Ubuntu	libfcgi	22.04	`2.4.2-2ubuntu0.1`	fixed
Ubuntu	libfcgi	24.04	`2.4.2-2build2`	vulnerable
Ubuntu	libfcgi	24.04	`2.4.2-2.1`	vulnerable
Ubuntu	libfcgi	24.04	`2.4.2-2.1build1`	vulnerable
Ubuntu	libfcgi	24.04	`2.4.2-2.1ubuntu0.24.04.1`	fixed
Ubuntu	libfcgi	25.10	`2.4.2-2.1build1`	vulnerable
Ubuntu	libfcgi	25.10	`2.4.5-0.1`	fixed
Opensuse	FastCGI	tumbleweed	`2.4.6-1.1`	fixed
Suse	FastCGI	linux enterprise module for development tools 15 sp6	`2.4.0-150000.4.3.1`	fixed
Suse	FastCGI	linux enterprise module for development tools 15 sp7	`2.4.0-150000.4.3.1`	fixed
Suse	FastCGI	linux enterprise high performance computing 15 sp3-ltss	`2.4.0-150000.4.3.1`	fixed
Suse	FastCGI	linux enterprise high performance computing 15 sp4-espos	`2.4.0-150000.4.3.1`	fixed
Suse	FastCGI	linux enterprise high performance computing 15 sp4-ltss	`2.4.0-150000.4.3.1`	fixed
Suse	FastCGI	linux enterprise high performance computing 15 sp5-espos	`2.4.0-150000.4.3.1`	fixed
Suse	FastCGI	linux enterprise high performance computing 15 sp5-ltss	`2.4.0-150000.4.3.1`	fixed
Suse	FastCGI	linux enterprise server 15 sp3-ltss	`2.4.0-150000.4.3.1`	fixed
Suse	FastCGI	linux enterprise server 15 sp4-ltss	`2.4.0-150000.4.3.1`	fixed
Suse	FastCGI	linux enterprise server 15 sp5-ltss	`2.4.0-150000.4.3.1`	fixed
Suse	FastCGI	linux enterprise server for sap applications 15 sp3	`2.4.0-150000.4.3.1`	fixed
Suse	FastCGI	linux enterprise server for sap applications 15 sp4	`2.4.0-150000.4.3.1`	fixed
Suse	FastCGI	linux enterprise server for sap applications 15 sp5	`2.4.0-150000.4.3.1`	fixed
Suse	FastCGI	enterprise storage 7.1	`2.4.0-150000.4.3.1`	fixed
Opensuse	FastCGI	leap 15.6	`2.4.0-150000.4.3.1`	fixed
Suse	FastCGI	linux enterprise server 12 sp5-ltss	`2.4.0-169.3.1`	fixed
Suse	FastCGI	linux enterprise server ltss extended security 12 sp5	`2.4.0-169.3.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libfcgi	source	sid	`2.4.5-0.1`	not yet assigned	Not reported	[1092774]
Debian	libfcgi	source	forky	`2.4.5-0.1`	not yet assigned	Not reported	[1092774]
Debian	libfcgi	source	trixie	`2.4.5-0.1`	not yet assigned	Not reported	[1092774]
Debian	libfcgi	source	bookworm	`2.4.2-2+deb12u1`	not yet assigned	Not reported	[1092774]
Ubuntu	libfcgi	deb	noble	`2.4.2-2.1ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Ubuntu	libfcgi-bin	deb	noble	`2.4.2-2.1ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Ubuntu	libfcgi-dev	deb	noble	`2.4.2-2.1ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Ubuntu	libfcgi0t64	deb	noble	`2.4.2-2.1ubuntu0.24.04.1`	Not reported	Not reported	Not reported
Ubuntu	libfcgi	deb	22.04	`2.4.2-2ubuntu0.1`	Not reported	USN-7486-1	Not reported
Ubuntu	libfcgi	deb	24.04	`2.4.2-2.1ubuntu0.24.04.1`	Not reported	USN-7486-1	Not reported
Ubuntu	libfcgi	deb	22.04	`2.4.2-2ubuntu0.1`	Not reported	UBUNTU-CVE-2025-23016	Not reported
Ubuntu	libfcgi	deb	24.04	`2.4.2-2.1ubuntu0.24.04.1`	Not reported	UBUNTU-CVE-2025-23016	Not reported
Ubuntu	libfcgi	deb	25.10	`2.4.5-0.1`	Not reported	UBUNTU-CVE-2025-23016	Not reported
Opensuse	FastCGI	rpm	tumbleweed	`2.4.6-1.1`	Not reported	OPENSUSE-SU-2025:15348-1	Not reported
Suse	FastCGI	rpm	linux enterprise module for development tools 15 sp6	`2.4.0-150000.4.3.1`	Not reported	SUSE-SU-2025:02372-1	Not reported
Suse	FastCGI	rpm	linux enterprise module for development tools 15 sp7	`2.4.0-150000.4.3.1`	Not reported	SUSE-SU-2025:02372-1	Not reported
Suse	FastCGI	rpm	linux enterprise high performance computing 15 sp3-ltss	`2.4.0-150000.4.3.1`	Not reported	SUSE-SU-2025:02372-1	Not reported
Suse	FastCGI	rpm	linux enterprise high performance computing 15 sp4-espos	`2.4.0-150000.4.3.1`	Not reported	SUSE-SU-2025:02372-1	Not reported
Suse	FastCGI	rpm	linux enterprise high performance computing 15 sp4-ltss	`2.4.0-150000.4.3.1`	Not reported	SUSE-SU-2025:02372-1	Not reported
Suse	FastCGI	rpm	linux enterprise high performance computing 15 sp5-espos	`2.4.0-150000.4.3.1`	Not reported	SUSE-SU-2025:02372-1	Not reported
Suse	FastCGI	rpm	linux enterprise high performance computing 15 sp5-ltss	`2.4.0-150000.4.3.1`	Not reported	SUSE-SU-2025:02372-1	Not reported
Suse	FastCGI	rpm	linux enterprise server 15 sp3-ltss	`2.4.0-150000.4.3.1`	Not reported	SUSE-SU-2025:02372-1	Not reported
Suse	FastCGI	rpm	linux enterprise server 15 sp4-ltss	`2.4.0-150000.4.3.1`	Not reported	SUSE-SU-2025:02372-1	Not reported
Suse	FastCGI	rpm	linux enterprise server 15 sp5-ltss	`2.4.0-150000.4.3.1`	Not reported	SUSE-SU-2025:02372-1	Not reported
Suse	FastCGI	rpm	linux enterprise server for sap applications 15 sp3	`2.4.0-150000.4.3.1`	Not reported	SUSE-SU-2025:02372-1	Not reported
Suse	FastCGI	rpm	linux enterprise server for sap applications 15 sp4	`2.4.0-150000.4.3.1`	Not reported	SUSE-SU-2025:02372-1	Not reported
Suse	FastCGI	rpm	linux enterprise server for sap applications 15 sp5	`2.4.0-150000.4.3.1`	Not reported	SUSE-SU-2025:02372-1	Not reported
Suse	FastCGI	rpm	enterprise storage 7.1	`2.4.0-150000.4.3.1`	Not reported	SUSE-SU-2025:02372-1	Not reported
Opensuse	FastCGI	rpm	leap 15.6	`2.4.0-150000.4.3.1`	Not reported	SUSE-SU-2025:02372-1	Not reported
Suse	FastCGI	rpm	linux enterprise server 12 sp5-ltss	`2.4.0-169.3.1`	Not reported	SUSE-SU-2025:02369-1	Not reported
Suse	FastCGI	rpm	linux enterprise server ltss extended security 12 sp5	`2.4.0-169.3.1`	Not reported	SUSE-SU-2025:02369-1	Not reported

[Debian bug #1092774]

OpenFactory catalog packages

[openSUSE Tumbleweed]

[FastCGI-devel]Unknown
Source package: [FastCGI]
Details (1)
- 2.4.7-1.7 · x86_64 · tumbleweed
  Unknown · Fixed: 2.4.6-1.1
  Version impact unknown
  usn · FastCGI · opensuse · tumbleweed
[libfcgi0]Unknown
Source package: [FastCGI]
Details (1)
- 2.4.7-1.7 · x86_64 · tumbleweed
  Unknown · Fixed: 2.4.6-1.1
  Version impact unknown
  usn · FastCGI · opensuse · tumbleweed
[perl-FCGI]Unknown
Source package: [FastCGI]
Details (1)
- 2.4.7-1.7 · x86_64 · tumbleweed
  Unknown · Fixed: 2.4.6-1.1
  Version impact unknown
  usn · FastCGI · opensuse · tumbleweed
[FastCGI]Fixed
Source package: [FastCGI]
Details (1)
- 2.4.7-1.7 · x86_64 · tumbleweed
  Fixed · Fixed: 2.4.6-1.1
  usn · FastCGI · opensuse · tumbleweed

[Debian 12 (Bookworm)]

[libfcgi0ldbl]Fixed
Source package: [libfcgi]
Details (2)
- 2.4.2-2+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 2.4.2-2+deb12u1
  usn · libfcgi · debian · bookworm; usn · libfcgi · debian · 12
- 2.4.2-2+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 2.4.2-2+deb12u1
  usn · libfcgi · debian · bookworm; usn · libfcgi · debian · 12
[libfcgi-bin]Fixed
Source package: [libfcgi]
Details (2)
- 2.4.2-2+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 2.4.2-2+deb12u1
  usn · libfcgi · debian · bookworm; usn · libfcgi · debian · 12
- 2.4.2-2+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 2.4.2-2+deb12u1
  usn · libfcgi · debian · bookworm; usn · libfcgi · debian · 12
[libfcgi-dev]Fixed
Source package: [libfcgi]
Details (2)
- 2.4.2-2+deb12u1 · amd64 · bookworm
  Fixed · Fixed: 2.4.2-2+deb12u1
  usn · libfcgi · debian · bookworm; usn · libfcgi · debian · 12
- 2.4.2-2+deb12u1 · arm64 · bookworm
  Fixed · Fixed: 2.4.2-2+deb12u1
  usn · libfcgi · debian · bookworm; usn · libfcgi · debian · 12

[Debian 13 (Trixie)]

[libfcgi0t64]Fixed
Source package: [libfcgi]
Details (2)
- 2.4.5-0.1 · amd64 · trixie
  Fixed · Fixed: 2.4.5-0.1
  usn · libfcgi · debian · 13
- 2.4.5-0.1 · arm64 · trixie
  Fixed · Fixed: 2.4.5-0.1
  usn · libfcgi · debian · 13
[libfcgi-bin]Fixed
Source package: [libfcgi]
Details (2)
- 2.4.5-0.1 · amd64 · trixie
  Fixed · Fixed: 2.4.5-0.1
  usn · libfcgi · debian · 13
- 2.4.5-0.1 · arm64 · trixie
  Fixed · Fixed: 2.4.5-0.1
  usn · libfcgi · debian · 13
[libfcgi-dev]Fixed
Source package: [libfcgi]
Details (2)
- 2.4.5-0.1 · amd64 · trixie
  Fixed · Fixed: 2.4.5-0.1
  usn · libfcgi · debian · 13
- 2.4.5-0.1 · arm64 · trixie
  Fixed · Fixed: 2.4.5-0.1
  usn · libfcgi · debian · 13

Observed: Oct 26, 2026, 11:36:49 PM UTC

References

[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]