CVE catalog

CVE-2023-3138

libx11: CVE-2023-3138

Severity: High · CVSS 7.3CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H
Published: Jun 15, 2023, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 1.66% · Oct 27, 2026

A vulnerability was found in libX11. The security flaw occurs because the functions in src/InitExt.c in libX11 do not check that the values provided for the Request, Event, or Error IDs are within the bounds of the arrays that those functions write to, using those IDs as array indexes. They trust that they were called with values provided by an Xserver adhering to the bounds specified in the X11 protocol, as all X servers provided by X.Org do. As the protocol only specifies a single byte for these values, an out-of-bounds value provided by a malicious server (or a malicious proxy-in-the-middle) can only overwrite other portions of the Display structure and not write outside the bounds of the Display structure itself, possibly causing the client to crash with this memory corruption.

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	libx11	sid	`2:1.8.14-1`	fixed
Debian	libx11	forky	`2:1.8.13-1`	fixed
Debian	libx11	trixie	`2:1.8.12-1`	fixed
Debian	libx11	bookworm	`2:1.8.4-2+deb12u2`	fixed
Debian	libx11	bookworm-security	`2:1.8.4-2+deb12u2`	fixed
Alpine	libx11	3.15	`1.7.3.1-r1`	fixed
Alpine	libx11	3.16	`1.8-r1`	fixed
Alpine	libx11	3.17	`1.8.4-r1`	fixed
Alpine	libx11	3.18	`1.8.4-r4`	fixed
Ubuntu	libx11	pro	`2:1.6.4-3`	vulnerable
Ubuntu	libx11	pro	`2:1.6.4-3ubuntu0.1`	vulnerable
Ubuntu	libx11	pro	`2:1.6.4-3ubuntu0.2`	vulnerable
Ubuntu	libx11	pro	`2:1.6.4-3ubuntu0.3`	vulnerable
Ubuntu	libx11	pro	`2:1.6.4-3ubuntu0.4`	vulnerable
Ubuntu	libx11	pro	`2:1.6.4-3ubuntu0.4+esm1`	fixed
Ubuntu	libx11	pro	`2:1.6.4-3`	vulnerable
Ubuntu	libx11	pro	`2:1.6.4-3ubuntu0.1`	vulnerable
Ubuntu	libx11	pro	`2:1.6.4-3ubuntu0.2`	vulnerable
Ubuntu	libx11	pro	`2:1.6.4-3ubuntu0.3`	vulnerable
Ubuntu	libx11	pro	`2:1.6.4-3ubuntu0.4`	vulnerable
Ubuntu	libx11	pro	`2:1.6.4-3ubuntu0.4+esm1`	fixed
Ubuntu	libx11	20.04	`2:1.6.8-1`	vulnerable
Ubuntu	libx11	20.04	`2:1.6.9-2`	vulnerable
Ubuntu	libx11	20.04	`2:1.6.9-2ubuntu1`	vulnerable
Ubuntu	libx11	20.04	`2:1.6.9-2ubuntu1.1`	vulnerable
Ubuntu	libx11	20.04	`2:1.6.9-2ubuntu1.2`	vulnerable
Ubuntu	libx11	20.04	`2:1.6.9-2ubuntu1.5`	fixed
Ubuntu	libx11	22.04	`2:1.7.2-1`	vulnerable
Ubuntu	libx11	22.04	`2:1.7.2-2`	vulnerable
Ubuntu	libx11	22.04	`2:1.7.2-2build1`	vulnerable
Ubuntu	libx11	22.04	`2:1.7.5-1`	vulnerable
Ubuntu	libx11	22.04	`2:1.7.5-1ubuntu0.2`	fixed
Ubuntu	libx11	20.04	`2:1.6.8-1`	vulnerable
Ubuntu	libx11	20.04	`2:1.6.9-2`	vulnerable
Ubuntu	libx11	20.04	`2:1.6.9-2ubuntu1`	vulnerable
Ubuntu	libx11	20.04	`2:1.6.9-2ubuntu1.1`	vulnerable
Ubuntu	libx11	20.04	`2:1.6.9-2ubuntu1.2`	vulnerable
Ubuntu	libx11	20.04	`2:1.6.9-2ubuntu1.5`	fixed
Ubuntu	libx11	22.04	`2:1.7.2-1`	vulnerable
Ubuntu	libx11	22.04	`2:1.7.2-2`	vulnerable
Ubuntu	libx11	22.04	`2:1.7.2-2build1`	vulnerable
Ubuntu	libx11	22.04	`2:1.7.5-1`	vulnerable
Ubuntu	libx11	22.04	`2:1.7.5-1ubuntu0.2`	fixed
Suse	libX11	linux enterprise micro 5.3	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	linux enterprise micro 5.4	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	linux enterprise module for basesystem 15 sp4	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	linux enterprise module for basesystem 15 sp5	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	linux enterprise high performance computing 15 sp1-ltss	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	linux enterprise high performance computing 15 sp2-ltss	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	linux enterprise high performance computing 15 sp3-espos	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	linux enterprise high performance computing 15 sp3-ltss	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	linux enterprise real time 15 sp3	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	linux enterprise server 15 sp1-ltss	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	linux enterprise server 15 sp2-ltss	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	linux enterprise server 15 sp3-ltss	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	linux enterprise server for sap applications 15 sp1	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	linux enterprise server for sap applications 15 sp2	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	linux enterprise server for sap applications 15 sp3	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	manager proxy 4.2	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	manager server 4.2	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	linux enterprise micro 5.2	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	enterprise storage 7	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	enterprise storage 7.1	`1.6.5-150000.3.30.1`	fixed
Opensuse	libX11	leap micro 5.3	`1.6.5-150000.3.30.1`	fixed
Opensuse	libX11	leap 15.4	`1.6.5-150000.3.30.1`	fixed
Opensuse	libX11	leap 15.5	`1.6.5-150000.3.30.1`	fixed
Suse	libX11	openstack cloud 9	`1.6.2-12.30.1`	fixed
Suse	libX11	openstack cloud crowbar 9	`1.6.2-12.30.1`	fixed
Suse	libX11	linux enterprise server for sap applications 12 sp4	`1.6.2-12.30.1`	fixed
Suse	libX11	linux enterprise software development kit 12 sp5	`1.6.2-12.30.1`	fixed
Suse	libX11	linux enterprise server 12 sp2-bcl	`1.6.2-12.30.1`	fixed
Suse	libX11	linux enterprise server 12 sp4-espos	`1.6.2-12.30.1`	fixed
Suse	libX11	linux enterprise server 12 sp4-ltss	`1.6.2-12.30.1`	fixed
Suse	libX11	linux enterprise server 12 sp5	`1.6.2-12.30.1`	fixed
Suse	libX11	linux enterprise server for sap applications 12 sp5	`1.6.2-12.30.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libx11	source	sid	`2:1.8.6-1`	not yet assigned	Not reported	[1038133]
Debian	libx11	source	forky	`2:1.8.6-1`	not yet assigned	Not reported	[1038133]
Debian	libx11	source	trixie	`2:1.8.6-1`	not yet assigned	Not reported	[1038133]
Debian	libx11	source	bookworm	`2:1.8.4-2+deb12u1`	not yet assigned	Not reported	[1038133]
Alpine	libx11	apk	3.15	`1.7.3.1-r1`	Not reported	ALPINE-CVE-2023-3138	Not reported
Alpine	libx11	apk	3.16	`1.8-r1`	Not reported	ALPINE-CVE-2023-3138	Not reported
Alpine	libx11	apk	3.17	`1.8.4-r1`	Not reported	ALPINE-CVE-2023-3138	Not reported
Alpine	libx11	apk	3.18	`1.8.4-r4`	Not reported	ALPINE-CVE-2023-3138	Not reported
Ubuntu	libx11	deb	pro	`2:1.6.4-3ubuntu0.4+esm1`	Not reported	USN-6168-2	Not reported
Ubuntu	libx11	deb	pro	`2:1.6.4-3ubuntu0.4+esm1`	Not reported	UBUNTU-CVE-2023-3138	Not reported
Ubuntu	libx11	deb	20.04	`2:1.6.9-2ubuntu1.5`	Not reported	UBUNTU-CVE-2023-3138	Not reported
Ubuntu	libx11	deb	22.04	`2:1.7.5-1ubuntu0.2`	Not reported	UBUNTU-CVE-2023-3138	Not reported
Ubuntu	libx11	deb	20.04	`2:1.6.9-2ubuntu1.5`	Not reported	USN-6168-1	Not reported
Ubuntu	libx11	deb	22.04	`2:1.7.5-1ubuntu0.2`	Not reported	USN-6168-1	Not reported
Suse	libX11	rpm	linux enterprise micro 5.3	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	linux enterprise micro 5.4	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	linux enterprise module for basesystem 15 sp4	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	linux enterprise module for basesystem 15 sp5	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	linux enterprise high performance computing 15 sp1-ltss	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	linux enterprise high performance computing 15 sp2-ltss	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	linux enterprise high performance computing 15 sp3-espos	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	linux enterprise high performance computing 15 sp3-ltss	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	linux enterprise real time 15 sp3	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	linux enterprise server 15 sp1-ltss	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	linux enterprise server 15 sp2-ltss	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	linux enterprise server 15 sp3-ltss	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	linux enterprise server for sap applications 15 sp1	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	linux enterprise server for sap applications 15 sp2	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	linux enterprise server for sap applications 15 sp3	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	manager proxy 4.2	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	manager server 4.2	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	linux enterprise micro 5.2	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	enterprise storage 7	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	enterprise storage 7.1	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Opensuse	libX11	rpm	leap micro 5.3	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Opensuse	libX11	rpm	leap 15.4	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Opensuse	libX11	rpm	leap 15.5	`1.6.5-150000.3.30.1`	Not reported	SUSE-SU-2023:2614-1	Not reported
Suse	libX11	rpm	openstack cloud 9	`1.6.2-12.30.1`	Not reported	SUSE-SU-2023:2531-1	Not reported
Suse	libX11	rpm	openstack cloud crowbar 9	`1.6.2-12.30.1`	Not reported	SUSE-SU-2023:2531-1	Not reported
Suse	libX11	rpm	linux enterprise server for sap applications 12 sp4	`1.6.2-12.30.1`	Not reported	SUSE-SU-2023:2531-1	Not reported
Suse	libX11	rpm	linux enterprise software development kit 12 sp5	`1.6.2-12.30.1`	Not reported	SUSE-SU-2023:2531-1	Not reported
Suse	libX11	rpm	linux enterprise server 12 sp2-bcl	`1.6.2-12.30.1`	Not reported	SUSE-SU-2023:2531-1	Not reported
Suse	libX11	rpm	linux enterprise server 12 sp4-espos	`1.6.2-12.30.1`	Not reported	SUSE-SU-2023:2531-1	Not reported
Suse	libX11	rpm	linux enterprise server 12 sp4-ltss	`1.6.2-12.30.1`	Not reported	SUSE-SU-2023:2531-1	Not reported
Suse	libX11	rpm	linux enterprise server 12 sp5	`1.6.2-12.30.1`	Not reported	SUSE-SU-2023:2531-1	Not reported
Suse	libX11	rpm	linux enterprise server for sap applications 12 sp5	`1.6.2-12.30.1`	Not reported	SUSE-SU-2023:2531-1	Not reported

[Debian bug #1038133]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libx11-6]Fixed
Source package: [libx11]
Details (4)
- 2:1.8.4-2+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · amd64 · bookworm-security
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · arm64 · bookworm-security
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
[libx11-data]Fixed
Source package: [libx11]
Details (4)
- 2:1.8.4-2+deb12u2 · all · bookworm
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · all · bookworm
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · all · bookworm-security
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · all · bookworm-security
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
[libx11-dev]Fixed
Source package: [libx11]
Details (4)
- 2:1.8.4-2+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · amd64 · bookworm-security
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · arm64 · bookworm-security
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
[libx11-doc]Fixed
Source package: [libx11]
Details (4)
- 2:1.8.4-2+deb12u2 · all · bookworm
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · all · bookworm
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · all · bookworm-security
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · all · bookworm-security
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
[libx11-xcb1]Fixed
Source package: [libx11]
Details (4)
- 2:1.8.4-2+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · amd64 · bookworm-security
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · arm64 · bookworm-security
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
[libx11-xcb-dev]Fixed
Source package: [libx11]
Details (4)
- 2:1.8.4-2+deb12u2 · amd64 · bookworm
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · arm64 · bookworm
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · amd64 · bookworm-security
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12
- 2:1.8.4-2+deb12u2 · arm64 · bookworm-security
  Fixed · Fixed: 2:1.8.4-2+deb12u1
  dsa · libx11 · debian · bookworm; dsa · libx11 · debian · 12

[Debian 13 (Trixie)]

[libx11-6]Fixed
Source package: [libx11]
Details (2)
- 2:1.8.12-1 · amd64 · trixie
  Fixed · Fixed: 2:1.8.6-1
  dsa · libx11 · debian · 13
- 2:1.8.12-1 · arm64 · trixie
  Fixed · Fixed: 2:1.8.6-1
  dsa · libx11 · debian · 13
[libx11-data]Fixed
Source package: [libx11]
Details (2)
- 2:1.8.12-1 · all · trixie
  Fixed · Fixed: 2:1.8.6-1
  dsa · libx11 · debian · 13
- 2:1.8.12-1 · all · trixie
  Fixed · Fixed: 2:1.8.6-1
  dsa · libx11 · debian · 13
[libx11-dev]Fixed
Source package: [libx11]
Details (2)
- 2:1.8.12-1 · amd64 · trixie
  Fixed · Fixed: 2:1.8.6-1
  dsa · libx11 · debian · 13
- 2:1.8.12-1 · arm64 · trixie
  Fixed · Fixed: 2:1.8.6-1
  dsa · libx11 · debian · 13
[libx11-doc]Fixed
Source package: [libx11]
Details (2)
- 2:1.8.12-1 · all · trixie
  Fixed · Fixed: 2:1.8.6-1
  dsa · libx11 · debian · 13
- 2:1.8.12-1 · all · trixie
  Fixed · Fixed: 2:1.8.6-1
  dsa · libx11 · debian · 13
[libx11-xcb1]Fixed
Source package: [libx11]
Details (2)
- 2:1.8.12-1 · amd64 · trixie
  Fixed · Fixed: 2:1.8.6-1
  dsa · libx11 · debian · 13
- 2:1.8.12-1 · arm64 · trixie
  Fixed · Fixed: 2:1.8.6-1
  dsa · libx11 · debian · 13
[libx11-xcb-dev]Fixed
Source package: [libx11]
Details (2)
- 2:1.8.12-1 · amd64 · trixie
  Fixed · Fixed: 2:1.8.6-1
  dsa · libx11 · debian · 13
- 2:1.8.12-1 · arm64 · trixie
  Fixed · Fixed: 2:1.8.6-1
  dsa · libx11 · debian · 13

Observed: Oct 28, 2026, 5:45:17 PM UTC

References

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