CVE catalog

CVE-2016-5766

libgd2: CVE-2016-5766

Severity: High · CVSS 8.8CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: Jun 23, 2016, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 7.50% · Oct 25, 2026

Integer overflow in the _gd2GetHeader function in gd_gd2.c in the GD Graphics Library (aka libgd) before 2.2.3, as used in PHP before 5.5.37, 5.6.x before 5.6.23, and 7.x before 7.0.8, allows remote attackers to cause a denial of service (heap-based buffer overflow and application crash) or possibly have unspecified other impact via crafted chunk dimensions in an image.

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	libgd2	sid	`2.3.3-14`	fixed
Debian	libgd2	forky	`2.3.3-14`	fixed
Debian	libgd2	trixie	`2.3.3-14~deb13u1`	fixed
Debian	libgd2	trixie-security	`2.3.3-14~deb13u1`	fixed
Debian	libgd2	bookworm	`2.3.3-9`	fixed
Debian	libgd2	bookworm-security	`2.3.3-9+deb12u1`	fixed
Alpine	gd	3.2	`2.2.1-r2`	fixed
Alpine	gd	3.3	`2.2.1-r2`	fixed
Alpine	gd	3.4	`2.2.3-r0`	fixed
Ubuntu	libgd2	14.04	`2.1.0-2`	vulnerable
Ubuntu	libgd2	14.04	`2.1.0-3`	vulnerable
Ubuntu	libgd2	14.04	`2.1.0-3ubuntu0.1`	vulnerable
Ubuntu	libgd2	14.04	`2.1.0-3ubuntu0.2`	fixed
Ubuntu	libgd2	16.04	`2.1.1-4build1`	vulnerable
Ubuntu	libgd2	16.04	`2.1.1-4build2`	vulnerable
Ubuntu	libgd2	16.04	`2.1.1-4ubuntu0.16.04.1`	vulnerable
Ubuntu	libgd2	16.04	`2.1.1-4ubuntu0.16.04.2`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libgd2	source	sid	`2.2.2-29-g3c2b605-1`	not yet assigned	Not reported	[829014]
Debian	libgd2	source	forky	`2.2.2-29-g3c2b605-1`	not yet assigned	Not reported	[829014]
Debian	libgd2	source	trixie	`2.2.2-29-g3c2b605-1`	not yet assigned	Not reported	[829014]
Debian	libgd2	source	bookworm	`2.2.2-29-g3c2b605-1`	not yet assigned	Not reported	[829014]
Alpine	gd	apk	3.2	`2.2.1-r2`	Not reported	ALPINE-CVE-2016-5766	Not reported
Alpine	gd	apk	3.3	`2.2.1-r2`	Not reported	ALPINE-CVE-2016-5766	Not reported
Alpine	gd	apk	3.4	`2.2.3-r0`	Not reported	ALPINE-CVE-2016-5766	Not reported
Ubuntu	libgd2	deb	14.04	`2.1.0-3ubuntu0.2`	Not reported	UBUNTU-CVE-2016-5766	Not reported
Ubuntu	libgd2	deb	16.04	`2.1.1-4ubuntu0.16.04.2`	Not reported	UBUNTU-CVE-2016-5766	Not reported

[Debian bug #829014]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[libgd3]Unknown
Source package: [libgd2]
Details (4)
- 2.3.3-9 · amd64 · bookworm
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · bookworm; dsa · libgd2 · debian · 12
- 2.3.3-9 · arm64 · bookworm
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · bookworm; dsa · libgd2 · debian · 12
- 2.3.3-9+deb12u1 · amd64 · bookworm-security
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · bookworm; dsa · libgd2 · debian · 12
- 2.3.3-9+deb12u1 · arm64 · bookworm-security
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · bookworm; dsa · libgd2 · debian · 12
[libgd-dev]Unknown
Source package: [libgd2]
Details (4)
- 2.3.3-9 · amd64 · bookworm
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · bookworm; dsa · libgd2 · debian · 12
- 2.3.3-9 · arm64 · bookworm
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · bookworm; dsa · libgd2 · debian · 12
- 2.3.3-9+deb12u1 · amd64 · bookworm-security
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · bookworm; dsa · libgd2 · debian · 12
- 2.3.3-9+deb12u1 · arm64 · bookworm-security
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · bookworm; dsa · libgd2 · debian · 12
[libgd-tools]Unknown
Source package: [libgd2]
Details (4)
- 2.3.3-9 · amd64 · bookworm
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · bookworm; dsa · libgd2 · debian · 12
- 2.3.3-9 · arm64 · bookworm
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · bookworm; dsa · libgd2 · debian · 12
- 2.3.3-9+deb12u1 · amd64 · bookworm-security
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · bookworm; dsa · libgd2 · debian · 12
- 2.3.3-9+deb12u1 · arm64 · bookworm-security
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · bookworm; dsa · libgd2 · debian · 12

[Debian 13 (Trixie)]

[libgd3]Unknown
Source package: [libgd2]
Details (4)
- 2.3.3-13 · amd64 · trixie
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · 13
- 2.3.3-13 · arm64 · trixie
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · 13
- 2.3.3-14~deb13u1 · amd64 · trixie-security
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · 13
- 2.3.3-14~deb13u1 · arm64 · trixie-security
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · 13
[libgd-dev]Unknown
Source package: [libgd2]
Details (4)
- 2.3.3-13 · amd64 · trixie
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · 13
- 2.3.3-13 · arm64 · trixie
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · 13
- 2.3.3-14~deb13u1 · amd64 · trixie-security
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · 13
- 2.3.3-14~deb13u1 · arm64 · trixie-security
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · 13
[libgd-tools]Unknown
Source package: [libgd2]
Details (4)
- 2.3.3-13 · amd64 · trixie
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · 13
- 2.3.3-13 · arm64 · trixie
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · 13
- 2.3.3-14~deb13u1 · amd64 · trixie-security
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · 13
- 2.3.3-14~deb13u1 · arm64 · trixie-security
  Fixed · Fixed: 2.2.2-29-g3c2b605-1
  dsa · libgd2 · debian · 13

Observed: Oct 23, 2026, 5:22:23 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]