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CVE-2026-94284

Out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser

5.5 MediumFix available

An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.13%Unchanged since Sep 28, 2026
90%50%10%1%

What each source reports

CVE List Score used 5.5

Out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser

An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

Record
CVE-2026-94284
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-125
Updated
2026-11-02
EUVDEUVD-2026-88175 5.5

An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

Record
EUVD-2026-88175
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-5j4r-gpq7-9www 5.5

An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11...

An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

Record
GHSA-5j4r-gpq7-9www
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-125
Updated
2026-11-02
NVD 5.5

An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

Record
CVE-2026-94284
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-125
Updated
2026-11-02
OSVALPINE-CVE-2026-94284 5.5

An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

Record
ALPINE-CVE-2026-94284
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVBELL-CVE-2026-94284 5.5
Record
BELL-CVE-2026-94284
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-04
Show 21 moreShow less
OSV 5.5

Out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser

An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

Record
CVE-2026-94284
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Weakness
CWE-125
Updated
2026-11-07
OSVDEBIAN-CVE-2026-94284 5.5

An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

Record
DEBIAN-CVE-2026-94284
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVOESA-2026-4247 7.5

libX11 security update

Core X11 protocol client library.

Security Fix(es):

A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map.(CVE-2026-88806)

An out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.(CVE-2026-94283)

An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.(CVE-2026-94284)

An out-of-bounds read in libX11's byte-oriented codeset parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.(CVE-2026-94285)

Record
OESA-2026-4247
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVOESA-2026-4248 7.5

libX11 security update

Core X11 protocol client library.

Security Fix(es):

A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map.(CVE-2026-88806)

An out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.(CVE-2026-94283)

An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.(CVE-2026-94284)

An out-of-bounds read in libX11's byte-oriented codeset parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.(CVE-2026-94285)

Record
OESA-2026-4248
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVOESA-2026-4249 7.5

libX11 security update

Core X11 protocol client library.

Security Fix(es):

A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map.(CVE-2026-88806)

An out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.(CVE-2026-94283)

An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.(CVE-2026-94284)

An out-of-bounds read in libX11's byte-oriented codeset parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.(CVE-2026-94285)

Record
OESA-2026-4249
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVOESA-2026-4250 7.5

libX11 security update

Core X11 protocol client library.

Security Fix(es):

A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map.(CVE-2026-88806)

An out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.(CVE-2026-94283)

An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.(CVE-2026-94284)

An out-of-bounds read in libX11's byte-oriented codeset parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.(CVE-2026-94285)

Record
OESA-2026-4250
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVRHSA-2026:79278 6.5

Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

Record
RHSA-2026:79278
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-94284 5.5

An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

Record
UBUNTU-CVE-2026-94284
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVAZL-104960 No score

CVE-2026-94284 affecting package libX11 for versions less than 1.8.14-1

An out-of-bounds read vulnerability in libX11's XIM trigger-key registration parser in libX11 before 1.8.14 could be used by malicious X servers to crash attached X clients.

Record
AZL-104960
Updated
2026-11-02
OSVMGASA-2026-0508 No score

Updated libx11 package fixes security vulnerabilities

libX11 XkbGetMap Reply Heap-based Buffer Overflow. (CVE-2026-88806) Out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser. (CVE-2026-94283) Out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser. (CVE-2026-94284) Out-of-bounds read in libX11's byte-oriented codeset parser. (CVE-2026-94285)

Record
MGASA-2026-0508
Updated
2026-11-02
OSVopenSUSE-SU-2026:11894-1 No score

libX11-6-1.8.13-3.1 on GA media

These are all security issues fixed in the libX11-6-1.8.13-3.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:11894-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:22055-1 No score

Security update for libX11

This update for libX11 fixes the following issues:

  • CVE-2026-94283: out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser (bsc#1281653).
  • CVE-2026-94284: out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser (bsc#1281657).
  • CVE-2026-94285: out-of-bounds read in libX11's byte-oriented codeset parser (bsc#1281661).
Record
openSUSE-SU-2026:22055-1
Updated
2026-11-02
OSVSUSE-SU-2026:24118-1 No score

Security update for libX11

This update for libX11 fixes the following issues:

  • CVE-2026-94283: out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser (bsc#1281653).
  • CVE-2026-94284: out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser (bsc#1281657).
  • CVE-2026-94285: out-of-bounds read in libX11's byte-oriented codeset parser (bsc#1281661).
Record
SUSE-SU-2026:24118-1
Updated
2026-11-02
OSVSUSE-SU-2026:24201-1 No score

Security update for libX11

This update for libX11 fixes the following issues:

  • CVE-2026-94283: out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser (bsc#1281653).
  • CVE-2026-94284: out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser (bsc#1281657).
  • CVE-2026-94285: out-of-bounds read in libX11's byte-oriented codeset parser (bsc#1281661).
Record
SUSE-SU-2026:24201-1
Updated
2026-11-02
OSVSUSE-SU-2026:24365-1 No score

Security update for libX11

This update for libX11 fixes the following issues:

  • CVE-2026-88806: XkbGetMap Reply Heap-based Buffer Overflow (bsc#1280910).
  • CVE-2026-94283: Out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser (bsc#1281653).
  • CVE-2026-94284: Out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser (bsc#1281657).
  • CVE-2026-94285: Out-of-bounds read in libX11's byte-oriented codeset parser (bsc#1281661).
Record
SUSE-SU-2026:24365-1
Updated
2026-11-02
OSVSUSE-SU-2026:24552-1 No score

Security update for libX11

This update for libX11 fixes the following issues:

  • CVE-2026-88806: XkbGetMap Reply Heap-based Buffer Overflow (bsc#1280910).
  • CVE-2026-94283: Out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser (bsc#1281653).
  • CVE-2026-94284: Out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser (bsc#1281657).
  • CVE-2026-94285: Out-of-bounds read in libX11's byte-oriented codeset parser (bsc#1281661).
Record
SUSE-SU-2026:24552-1
Updated
2026-11-07
OSVSUSE-SU-2026:4410-1 No score

Security update for libX11

This update for libX11 fixes the following issues:

  • CVE-2026-88806: XkbGetMap Reply Heap-based Buffer Overflow (bsc#1280910).
  • CVE-2026-94283: out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser (bsc#1281653).
  • CVE-2026-94284: out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser (bsc#1281657).
  • CVE-2026-94285: out-of-bounds read in libX11's byte-oriented codeset parser (bsc#1281661).
Record
SUSE-SU-2026:4410-1
Updated
2026-11-02
OSVSUSE-SU-2026:4500-1 No score

Security update for libX11

This update for libX11 fixes the following issues:

  • CVE-2026-88806: XkbGetMap Reply Heap-based Buffer Overflow (bsc#1280910).
  • CVE-2026-94283: out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser (bsc#1281653).
  • CVE-2026-94284: out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser (bsc#1281657).
  • CVE-2026-94285: out-of-bounds read in libX11's byte-oriented codeset parser (bsc#1281661).
Record
SUSE-SU-2026:4500-1
Updated
2026-11-02
OSVSUSE-SU-2026:4501-1 No score

Security update for libX11

This update for libX11 fixes the following issues:

  • CVE-2026-88806: XkbGetMap Reply Heap-based Buffer Overflow (bsc#1280910).
  • CVE-2026-94283: out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser (bsc#1281653).
  • CVE-2026-94284: out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser (bsc#1281657).
  • CVE-2026-94285: out-of-bounds read in libX11's byte-oriented codeset parser (bsc#1281661).
Record
SUSE-SU-2026:4501-1
Updated
2026-11-02
OSVSUSE-SU-2026:4502-1 No score

Security update for libX11

This update for libX11 fixes the following issues:

  • CVE-2026-88806: XkbGetMap Reply Heap-based Buffer Overflow (bsc#1280910).
  • CVE-2026-94283: out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser (bsc#1281653).
  • CVE-2026-94284: out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser (bsc#1281657).
  • CVE-2026-94285: out-of-bounds read in libX11's byte-oriented codeset parser (bsc#1281661).
Record
SUSE-SU-2026:4502-1
Updated
2026-11-02
OSVUSN-8913-1 No score

libx11 vulnerabilities

Adam Bedard discovered that libx11 incorrectly handled certain XKB keyboard map replies. If a user were tricked into connecting to a malicious X server, a remote attacker could possibly use this issue to cause libx11 to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2026-88806)

It was discovered that libx11 incorrectly handled certain X Input Method (XIM) messages. If a user were tricked into connecting to a malicious X server, a remote attacker could possibly use these issues to cause libx11 to crash, resulting in a denial of service. (CVE-2026-94283, CVE-2026-94284)

It was discovered that libx11 incorrectly handled converting certain multibyte text. An attacker could possibly use this issue to cause libx11 to crash, resulting in a denial of service. (CVE-2026-94285)

Record
USN-8913-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
libx11
Alpine:v3.24
 before 1.8.14-r0
1.8.14-r0
libX11
Azure Linux:3
 before 1.8.14-1
1.8.14-1
libx11
Alpaquita:23
 1.8.2-r0 up to 1.8.14-r0
1.8.14-r0
libx11
Alpaquita:25
 1.8.11-r0 up to 1.8.14-r0
1.8.14-r0
libx11
Alpaquita:stream
 1.8.2-r0 up to 1.8.14-r0
1.8.14-r0
libx11
BellSoft Hardened Containers:23
 1.8.2-r0 up to 1.8.14-r0
1.8.14-r0
libx11
BellSoft Hardened Containers:25
 1.8.11-r0 up to 1.8.14-r0
1.8.14-r0
libx11
BellSoft Hardened Containers:stream
 1.8.2-r0 up to 1.8.14-r0
1.8.14-r0
libx11
Debian:12
 All versions, plus listed versions
2:1.8.10-12:1.8.10-22:1.8.12-12:1.8.13-12:1.8.14-1
Show 5 moreShow less
2:1.8.4-22:1.8.4-2+deb12u12:1.8.4-2+deb12u22:1.8.6-12:1.8.7-1
 None known
libx11
Debian:13
 All versions, plus listed versions
2:1.8.12-12:1.8.13-12:1.8.14-1
 None known
Show 48 moreShow less
Affected packages
PackageAffectedFixed
libx11
Debian:14
 before 2:1.8.14-1, plus listed versions
2:1.8.12-12:1.8.13-1
2:1.8.14-1
libx11
Mageia:10
From an advisory covering 4 CVEs
 before 1.8.12-1.1.mga10
1.8.12-1.1.mga10
libX11
openEuler:24.03-LTS-SP1
From an advisory covering 4 CVEs
 before 1.8.7-4.oe2403sp1
1.8.7-4.oe2403sp1
libX11
openEuler:24.03-LTS-SP3
From an advisory covering 4 CVEs
 before 1.8.7-4.oe2403sp3
1.8.7-4.oe2403sp3
libX11
openEuler:24.03-LTS-SP4
From an advisory covering 4 CVEs
 before 1.8.7-4.oe2403sp4
1.8.7-4.oe2403sp4
libX11
openEuler:22.03-LTS-SP4
From an advisory covering 4 CVEs
 before 1.7.2-11.oe2203sp4
1.7.2-11.oe2203sp4
libX11
Red Hat:hummingbird:1
From an advisory covering 3 CVEs
 before 0:1.8.13-3.1.hum1
0:1.8.13-3.1.hum1
libX11-common
Red Hat:hummingbird:1
From an advisory covering 3 CVEs
 before 0:1.8.13-3.1.hum1
0:1.8.13-3.1.hum1
libX11-devel
Red Hat:hummingbird:1
From an advisory covering 3 CVEs
 before 0:1.8.13-3.1.hum1
0:1.8.13-3.1.hum1
libX11-xcb
Red Hat:hummingbird:1
From an advisory covering 3 CVEs
 before 0:1.8.13-3.1.hum1
0:1.8.13-3.1.hum1
libX11
SUSE:Linux Micro 6.2
From an advisory covering 3 CVEs
 before 1.8.10-160000.5.1
1.8.10-160000.5.1
libX11
SUSE:Linux Enterprise Server 16.0
From an advisory covering 3 CVEs
 before 1.8.10-160000.5.1
1.8.10-160000.5.1
libX11
SUSE:Linux Enterprise Server for SAP applications 16.0
From an advisory covering 3 CVEs
 before 1.8.10-160000.5.1
1.8.10-160000.5.1
libX11
SUSE:Linux Micro 6.0
From an advisory covering 4 CVEs
 before 1.8.7-159998.1.1
1.8.7-159998.1.1
libX11
SUSE:Linux Micro 6.1
From an advisory covering 4 CVEs
 before 1.8.7-slfo.1.1_4.1
1.8.7-slfo.1.1_4.1
libX11
SUSE:Linux Enterprise Server 12 SP5-LTSS
From an advisory covering 4 CVEs
 before 1.6.2-12.41.1
1.6.2-12.41.1
libX11
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5
From an advisory covering 4 CVEs
 before 1.6.2-12.41.1
1.6.2-12.41.1
libX11
SUSE:Linux Enterprise Micro 5.3
From an advisory covering 4 CVEs
 before 1.6.5-150000.3.41.1
1.6.5-150000.3.41.1
libX11
SUSE:Linux Enterprise Micro 5.4
From an advisory covering 4 CVEs
 before 1.6.5-150000.3.41.1
1.6.5-150000.3.41.1
libX11
SUSE:Linux Enterprise Micro 5.5
From an advisory covering 4 CVEs
 before 1.6.5-150000.3.41.1
1.6.5-150000.3.41.1
libX11
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS
From an advisory covering 4 CVEs
 before 1.6.5-150000.3.41.1
1.6.5-150000.3.41.1
libX11
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS
From an advisory covering 4 CVEs
 before 1.6.5-150000.3.41.1
1.6.5-150000.3.41.1
libX11
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS
From an advisory covering 4 CVEs
 before 1.6.5-150000.3.41.1
1.6.5-150000.3.41.1
libX11
SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS
From an advisory covering 4 CVEs
 before 1.6.5-150000.3.41.1
1.6.5-150000.3.41.1
libX11
SUSE:Linux Enterprise Server 15 SP4-LTSS
From an advisory covering 4 CVEs
 before 1.6.5-150000.3.41.1
1.6.5-150000.3.41.1
libX11
SUSE:Linux Enterprise Server 15 SP5-LTSS
From an advisory covering 4 CVEs
 before 1.6.5-150000.3.41.1
1.6.5-150000.3.41.1
libX11
SUSE:Linux Enterprise Server for SAP Applications 15 SP4
From an advisory covering 4 CVEs
 before 1.6.5-150000.3.41.1
1.6.5-150000.3.41.1
libX11
SUSE:Linux Enterprise Server for SAP Applications 15 SP5
From an advisory covering 4 CVEs
 before 1.6.5-150000.3.41.1
1.6.5-150000.3.41.1
libX11
SUSE:Linux Enterprise Server 15 SP6-LTSS
From an advisory covering 4 CVEs
 before 1.8.7-150600.3.11.1
1.8.7-150600.3.11.1
libX11
SUSE:Linux Enterprise Server for SAP Applications 15 SP6
From an advisory covering 4 CVEs
 before 1.8.7-150600.3.11.1
1.8.7-150600.3.11.1
libX11
SUSE:Linux Enterprise Module for Basesystem 15 SP7
From an advisory covering 4 CVEs
 before 1.8.10-150700.4.8.1
1.8.10-150700.4.8.1
libx11
Ubuntu:Pro:14.04:LTS
 before 2:1.6.2-1ubuntu2.1+esm6, plus listed versions
2:1.6.1-1ubuntu12:1.6.1-1ubuntu22:1.6.2-1ubuntu12:1.6.2-1ubuntu22:1.6.2-1ubuntu2.1
Show 5 moreShow less
2:1.6.2-1ubuntu2.1+esm12:1.6.2-1ubuntu2.1+esm22:1.6.2-1ubuntu2.1+esm32:1.6.2-1ubuntu2.1+esm42:1.6.2-1ubuntu2.1+esm5
2:1.6.2-1ubuntu2.1+esm6
libx11
Ubuntu:Pro:16.04:LTS
 before 2:1.6.3-1ubuntu2.2+esm5, plus listed versions
2:1.6.3-1ubuntu22:1.6.3-1ubuntu2.12:1.6.3-1ubuntu2.22:1.6.3-1ubuntu2.2+esm12:1.6.3-1ubuntu2.2+esm22:1.6.3-1ubuntu2.2+esm32:1.6.3-1ubuntu2.2+esm4
2:1.6.3-1ubuntu2.2+esm5
libx11
Ubuntu:Pro:18.04:LTS
 before 2:1.6.4-3ubuntu0.4+esm3, plus listed versions
2:1.6.4-32:1.6.4-3ubuntu0.12:1.6.4-3ubuntu0.22:1.6.4-3ubuntu0.32:1.6.4-3ubuntu0.42:1.6.4-3ubuntu0.4+esm12:1.6.4-3ubuntu0.4+esm2
2:1.6.4-3ubuntu0.4+esm3
libx11
Ubuntu:Pro:20.04:LTS
 before 2:1.6.9-2ubuntu1.6+esm1, plus listed versions
2:1.6.8-12:1.6.9-22:1.6.9-2ubuntu12:1.6.9-2ubuntu1.12:1.6.9-2ubuntu1.22:1.6.9-2ubuntu1.52:1.6.9-2ubuntu1.6
2:1.6.9-2ubuntu1.6+esm1
libx11
Ubuntu:22.04:LTS
 before 2:1.7.5-1ubuntu0.4, plus listed versions
2:1.7.2-12:1.7.2-22:1.7.2-2build12:1.7.5-12:1.7.5-1ubuntu0.22:1.7.5-1ubuntu0.3
2:1.7.5-1ubuntu0.4
libx11
Ubuntu:24.04:LTS
 before 2:1.8.7-1ubuntu0.1, plus listed versions
2:1.8.6-1ubuntu12:1.8.7-12:1.8.7-1build1
2:1.8.7-1ubuntu0.1
libx11
Ubuntu:26.10
 All versions, plus listed versions
2:1.8.13-1
 None known
libx11
Ubuntu:26.04:LTS
 before 2:1.8.13-1ubuntu0.1, plus listed versions
2:1.8.12-1build12:1.8.12-1build22:1.8.13-1
2:1.8.13-1ubuntu0.1
libx11
Ubuntu:Pro:14.04:LTS
From an advisory covering 4 CVEs
 before 2:1.6.2-1ubuntu2.1+esm6, plus listed versions
2:1.6.1-1ubuntu12:1.6.1-1ubuntu22:1.6.2-1ubuntu12:1.6.2-1ubuntu22:1.6.2-1ubuntu2.1
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2:1.6.2-1ubuntu2.1+esm12:1.6.2-1ubuntu2.1+esm22:1.6.2-1ubuntu2.1+esm32:1.6.2-1ubuntu2.1+esm42:1.6.2-1ubuntu2.1+esm5
2:1.6.2-1ubuntu2.1+esm6
libx11
Ubuntu:Pro:16.04:LTS
From an advisory covering 4 CVEs
 before 2:1.6.3-1ubuntu2.2+esm5, plus listed versions
2:1.6.3-1ubuntu22:1.6.3-1ubuntu2.12:1.6.3-1ubuntu2.22:1.6.3-1ubuntu2.2+esm12:1.6.3-1ubuntu2.2+esm22:1.6.3-1ubuntu2.2+esm32:1.6.3-1ubuntu2.2+esm4
2:1.6.3-1ubuntu2.2+esm5
libx11
Ubuntu:Pro:18.04:LTS
From an advisory covering 4 CVEs
 before 2:1.6.4-3ubuntu0.4+esm3, plus listed versions
2:1.6.4-32:1.6.4-3ubuntu0.12:1.6.4-3ubuntu0.22:1.6.4-3ubuntu0.32:1.6.4-3ubuntu0.42:1.6.4-3ubuntu0.4+esm12:1.6.4-3ubuntu0.4+esm2
2:1.6.4-3ubuntu0.4+esm3
libx11
Ubuntu:Pro:20.04:LTS
From an advisory covering 4 CVEs
 before 2:1.6.9-2ubuntu1.6+esm1, plus listed versions
2:1.6.8-12:1.6.9-22:1.6.9-2ubuntu12:1.6.9-2ubuntu1.12:1.6.9-2ubuntu1.22:1.6.9-2ubuntu1.52:1.6.9-2ubuntu1.6
2:1.6.9-2ubuntu1.6+esm1
libx11
Ubuntu:22.04:LTS
From an advisory covering 4 CVEs
 before 2:1.7.5-1ubuntu0.4, plus listed versions
2:1.7.2-12:1.7.2-22:1.7.2-2build12:1.7.5-12:1.7.5-1ubuntu0.22:1.7.5-1ubuntu0.3
2:1.7.5-1ubuntu0.4
libx11
Ubuntu:24.04:LTS
From an advisory covering 4 CVEs
 before 2:1.8.7-1ubuntu0.1, plus listed versions
2:1.8.6-1ubuntu12:1.8.7-12:1.8.7-1build1
2:1.8.7-1ubuntu0.1
libx11
Ubuntu:26.04:LTS
From an advisory covering 4 CVEs
 before 2:1.8.13-1ubuntu0.1, plus listed versions
2:1.8.12-1build12:1.8.12-1build22:1.8.13-1
2:1.8.13-1ubuntu0.1
libX11
openSUSE:Tumbleweed
From an advisory covering 3 CVEs
 before 1.8.13-3.1
1.8.13-3.1
libX11
openSUSE:Leap 16.0
From an advisory covering 3 CVEs
 before 1.8.10-160000.5.1
1.8.10-160000.5.1

History

History
RecordedChangedSources
affected, aliases, referencesOSV
affected
affected, factsOSV
affectedOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-94284 is a medium vulnerability (CVSS 5.5) in The X11 Project Libx11, published September 28, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.13%, the 2nd percentile. Fixed in libx11 1.8.14-r0.

References

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