Every CVE Search/ Get API key

CVE-2026-94286

Out-of-bounds read in libXtst's RECORD reply parser

7.1 HighFix available

An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Required

What an attacker can affect

Confidentiality
Low
Integrity
None
Availability
High

Exploit likelihood

0.20%Unchanged since Sep 28, 2026
90%50%10%1%

What each source reports

CVE List Score used 7.1

Out-of-bounds read in libXtst's RECORD reply parser

An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.

Record
CVE-2026-94286
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Weakness
CWE-126
Updated
2026-11-02
EUVDEUVD-2026-88178 7.1

An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.

Record
EUVD-2026-88178
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-xhgq-6j5j-j427 7.1

An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by...

An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.

Record
GHSA-xhgq-6j5j-j427
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Weakness
CWE-126
Updated
2026-11-02
NVD 7.1

An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.

Record
CVE-2026-94286
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Weakness
CWE-126
Updated
2026-11-02
OSVALPINE-CVE-2026-94286 7.1

An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.

Record
ALPINE-CVE-2026-94286
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSVBELL-CVE-2026-94286 7.1
Record
BELL-CVE-2026-94286
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Updated
2026-11-04
Show 24 moreShow less
OSV 7.1

Out-of-bounds read in libXtst's RECORD reply parser

An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.

Record
CVE-2026-94286
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Weakness
CWE-126
Updated
2026-11-02
OSVDEBIAN-CVE-2026-94286 7.1

An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.

Record
DEBIAN-CVE-2026-94286
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSVOESA-2026-4325 7.1

libXtst security update

X.Org X11 libXtst runtime library

Security Fix(es):

An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.(CVE-2026-94286)

Record
OESA-2026-4325
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSVOESA-2026-4326 7.1

libXtst security update

X.Org X11 libXtst runtime library

Security Fix(es):

An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.(CVE-2026-94286)

Record
OESA-2026-4326
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSVOESA-2026-4327 7.1

libXtst security update

X.Org X11 libXtst runtime library

Security Fix(es):

An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.(CVE-2026-94286)

Record
OESA-2026-4327
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSVOESA-2026-4328 7.1

libXtst security update

X.Org X11 libXtst runtime library

Security Fix(es):

An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.(CVE-2026-94286)

Record
OESA-2026-4328
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSVRHSA-2026:79192 7.1

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

Record
RHSA-2026:79192
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSVRLSA-2026:91223 7.1

Important: libXtst security update

X.Org X11 libXtst runtime library

Security Fix(es):

  • libXtst: libXtst: Denial of Service via out-of-bounds read in RECORD reply parser (CVE-2026-94286)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2026:91223
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSVRLSA-2026:91294 7.1

Important: libXtst security update

X.Org X11 libXtst runtime library

Security Fix(es):

  • libXtst: libXtst: Denial of Service via out-of-bounds read in RECORD reply parser (CVE-2026-94286)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2026:91294
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSVRLSA-2026:91612 7.1

Important: libXtst security update

X.Org X11 libXtst runtime library

Security Fix(es):

  • libXtst: libXtst: Denial of Service via out-of-bounds read in RECORD reply parser (CVE-2026-94286)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
RLSA-2026:91612
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2026-94286 7.1

An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.

Record
UBUNTU-CVE-2026-94286
CVSS 3.1
7.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H
Updated
2026-11-02
OSVALSA-2026:91223 No score

Important: libXtst security update

X.Org X11 libXtst runtime library

Security Fix(es):

  • libXtst: libXtst: Denial of Service via out-of-bounds read in RECORD reply parser (CVE-2026-94286)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
ALSA-2026:91223
Updated
2026-11-02
OSVALSA-2026:91294 No score

Important: libXtst security update

X.Org X11 libXtst runtime library

Security Fix(es):

  • libXtst: libXtst: Denial of Service via out-of-bounds read in RECORD reply parser (CVE-2026-94286)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
ALSA-2026:91294
Updated
2026-11-02
OSVALSA-2026:91612 No score

Important: libXtst security update

X.Org X11 libXtst runtime library

Security Fix(es):

  • libXtst: libXtst: Denial of Service via out-of-bounds read in RECORD reply parser (CVE-2026-94286)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Record
ALSA-2026:91612
Updated
2026-11-02
OSVAZL-104969 No score

CVE-2026-94286 affecting package libXtst for versions less than 1.2.6-1

An out-of-bounds read in libXtst's RECORD reply parser in libXtst before 1.2.6 could be used by malicious X servers to crash attached X clients.

Record
AZL-104969
Updated
2026-11-06
OSVMGASA-2026-0528 No score

Updated libxtst package fixes a security vulnerability

Out-of-bounds read in libXtst's RECORD reply parser. (CVE-2026-94286)

Record
MGASA-2026-0528
Updated
2026-11-02
OSVopenSUSE-SU-2026:11897-1 No score

libXtst-devel-1.2.5-2.1 on GA media

These are all security issues fixed in the libXtst-devel-1.2.5-2.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:11897-1
Updated
2026-11-02
OSVopenSUSE-SU-2026:22031-1 No score

Security update for libXtst

This update for libXtst fixes the following issue:

  • CVE-2026-94286: out-of-bounds read in libXtst's RECORD reply parser (bsc#1281665).
Record
openSUSE-SU-2026:22031-1
Updated
2026-11-02
OSVROOT-OS-DEBIAN-12-CVE-2026-94286 No score

CVE-2026-94286 in libxtst - Patched by Root

Root has patched CVE-2026-94286 in the libxtst package for Root:Debian:12. Multiple fixed versions available.

Record
ROOT-OS-DEBIAN-12-CVE-2026-94286
Updated
2026-11-02
OSVROOT-OS-DEBIAN-13-CVE-2026-94286 No score

CVE-2026-94286 in libxtst - Patched by Root

Root has patched CVE-2026-94286 in the libxtst package for Root:Debian:13. Multiple fixed versions available.

Record
ROOT-OS-DEBIAN-13-CVE-2026-94286
Updated
2026-11-02
OSVSUSE-SU-2026:24145-1 No score

Security update for libXtst

This update for libXtst fixes the following issue:

  • CVE-2026-94286: out-of-bounds read in libXtst's RECORD reply parser (bsc#1281665).
Record
SUSE-SU-2026:24145-1
Updated
2026-11-02
OSVSUSE-SU-2026:4565-1 No score

Security update for libXtst

This update for libXtst fixes the following issue:

  • CVE-2026-94286: out-of-bounds read in libXtst's RECORD reply parser (bsc#1281665).
Record
SUSE-SU-2026:4565-1
Updated
2026-11-02
OSVSUSE-SU-2026:4566-1 No score

Security update for libXtst

This update for libXtst fixes the following issue:

  • CVE-2026-94286: out-of-bounds read in libXtst's RECORD reply parser (bsc#1281665).
Record
SUSE-SU-2026:4566-1
Updated
2026-11-02
OSVUSN-8939-1 No score

libxtst vulnerabilities

It was discovered that libXtst did not properly handle certain RECORD replies from the X server. A malicious X server could possibly use this issue to cause libXtst clients to crash, resulting in a denial of service. (CVE-2026-94286)

Tobias Stoeckmann discovered that libXtst did not properly handle certain memory operations. A malicious X server could possibly use this issue to cause libXtst to access memory out of bounds, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS. (CVE-2016-7951)

Tobias Stoeckmann discovered that libXtst did not properly handle certain replies from the X server. A malicious X server could possibly use this issue to cause libXtst to enter an infinite loop, resulting in a denial of service. This issue only affected Ubuntu 16.04 LTS. (CVE-2016-7952)

Record
USN-8939-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
libxtst
Alpine:v3.24
before 1.2.6-r0
1.2.6-r0
libXtst
AlmaLinux:9
before 1.2.3-16.el9_8.1
1.2.3-16.el9_8.1
libXtst-devel
AlmaLinux:9
before 1.2.3-16.el9_8.1
1.2.3-16.el9_8.1
libXtst
AlmaLinux:8
before 1.2.3-8.el8_10
1.2.3-8.el8_10
libXtst-devel
AlmaLinux:8
before 1.2.3-8.el8_10
1.2.3-8.el8_10
libXtst
AlmaLinux:10
before 1.2.4-8.el10_2.1
1.2.4-8.el10_2.1
libXtst-devel
AlmaLinux:10
before 1.2.4-8.el10_2.1
1.2.4-8.el10_2.1
libXtst
Azure Linux:3
before 1.2.6-1
1.2.6-1
libxtst
Alpaquita:23
1.2.4-r0 up to 1.2.6-r0
1.2.6-r0
libxtst
Alpaquita:25
1.2.5-r0 up to 1.2.6-r0
1.2.6-r0
Show 52 moreShow less
Affected packages
PackageAffectedFixed
libxtst
Alpaquita:stream
1.2.4-r0 up to 1.2.6-r0
1.2.6-r0
libxtst
Debian:12
All versions, plus listed versions
2:1.2.3-1.12:1.2.5-12:1.2.6-1
None known
libxtst
Debian:13
All versions, plus listed versions
2:1.2.5-12:1.2.6-1
None known
libxtst
Debian:14
before 2:1.2.6-1, plus listed versions
2:1.2.5-1
2:1.2.6-1
libxtst
Mageia:10
before 1.2.5-2.1.mga10
1.2.5-2.1.mga10
libXtst
openEuler:22.03-LTS-SP4
before 1.2.4-3.oe2203sp4
1.2.4-3.oe2203sp4
libXtst
openEuler:24.03-LTS-SP1
before 1.2.4-3.oe2403sp1
1.2.4-3.oe2403sp1
libXtst
openEuler:24.03-LTS-SP3
before 1.2.4-3.oe2403sp3
1.2.4-3.oe2403sp3
libXtst
openEuler:24.03-LTS-SP4
before 1.2.4-3.oe2403sp4
1.2.4-3.oe2403sp4
libXtst
Red Hat:hummingbird:1
before 0:1.2.5-5.1.hum1
0:1.2.5-5.1.hum1
libXtst-devel
Red Hat:hummingbird:1
before 0:1.2.5-5.1.hum1
0:1.2.5-5.1.hum1
libXtst
Rocky Linux:9
before 0:1.2.3-16.el9_8.1
0:1.2.3-16.el9_8.1
libXtst
Rocky Linux:8
before 0:1.2.3-8.el8_10
0:1.2.3-8.el8_10
libXtst
Rocky Linux:10
before 0:1.2.4-8.el10_2.1
0:1.2.4-8.el10_2.1
libxtst
Root:Debian:12
before 2:1.2.3-1.1.aikido.1
2:1.2.3-1.1.aikido.1
rootio-libxtst
Root:Debian:12
before 2:1.2.3-1.1.aikido.1
2:1.2.3-1.1.aikido.1
libxtst
Root:Debian:13
before 2:1.2.5-1.aikido.1
2:1.2.5-1.aikido.1
rootio-libxtst
Root:Debian:13
before 2:1.2.5-1.aikido.1
2:1.2.5-1.aikido.1
libXtst
SUSE:Linux Enterprise Server 16.0
before 1.2.5-160000.4.1
1.2.5-160000.4.1
libXtst
SUSE:Linux Enterprise Server for SAP applications 16.0
before 1.2.5-160000.4.1
1.2.5-160000.4.1
libXtst
SUSE:Linux Enterprise Server 12 SP5-LTSS
before 1.2.2-8.3.1
1.2.2-8.3.1
libXtst
SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5
before 1.2.2-8.3.1
1.2.2-8.3.1
libXtst
SUSE:Linux Enterprise Micro 5.3
before 1.2.3-150000.3.3.1
1.2.3-150000.3.3.1
libXtst
SUSE:Linux Enterprise Micro 5.4
before 1.2.3-150000.3.3.1
1.2.3-150000.3.3.1
libXtst
SUSE:Linux Enterprise Micro 5.5
before 1.2.3-150000.3.3.1
1.2.3-150000.3.3.1
libXtst
SUSE:Linux Enterprise Module for Basesystem 15 SP7
before 1.2.3-150000.3.3.1
1.2.3-150000.3.3.1
libXtst
SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS
before 1.2.3-150000.3.3.1
1.2.3-150000.3.3.1
libXtst
SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS
before 1.2.3-150000.3.3.1
1.2.3-150000.3.3.1
libXtst
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS
before 1.2.3-150000.3.3.1
1.2.3-150000.3.3.1
libXtst
SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS
before 1.2.3-150000.3.3.1
1.2.3-150000.3.3.1
libXtst
SUSE:Linux Enterprise Server 15 SP4-LTSS
before 1.2.3-150000.3.3.1
1.2.3-150000.3.3.1
libXtst
SUSE:Linux Enterprise Server 15 SP5-LTSS
before 1.2.3-150000.3.3.1
1.2.3-150000.3.3.1
libXtst
SUSE:Linux Enterprise Server 15 SP6-LTSS
before 1.2.3-150000.3.3.1
1.2.3-150000.3.3.1
libXtst
SUSE:Linux Enterprise Server for SAP Applications 15 SP4
before 1.2.3-150000.3.3.1
1.2.3-150000.3.3.1
libXtst
SUSE:Linux Enterprise Server for SAP Applications 15 SP5
before 1.2.3-150000.3.3.1
1.2.3-150000.3.3.1
libXtst
SUSE:Linux Enterprise Server for SAP Applications 15 SP6
before 1.2.3-150000.3.3.1
1.2.3-150000.3.3.1
libxtst
Ubuntu:Pro:16.04:LTS
before 2:1.2.2-1ubuntu0.1~esm1, plus listed versions
2:1.2.2-1
2:1.2.2-1ubuntu0.1~esm1
libxtst
Ubuntu:Pro:18.04:LTS
before 2:1.2.3-1ubuntu0.18.04.1~esm1, plus listed versions
2:1.2.3-1
2:1.2.3-1ubuntu0.18.04.1~esm1
libxtst
Ubuntu:Pro:20.04:LTS
before 2:1.2.3-1ubuntu0.20.04.1~esm1, plus listed versions
2:1.2.3-1
2:1.2.3-1ubuntu0.20.04.1~esm1
libxtst
Ubuntu:22.04:LTS
before 2:1.2.3-1ubuntu0.22.04.1, plus listed versions
2:1.2.3-1build22:1.2.3-1build32:1.2.3-1build4
2:1.2.3-1ubuntu0.22.04.1
libxtst
Ubuntu:24.04:LTS
before 2:1.2.3-1.1ubuntu0.1, plus listed versions
2:1.2.3-1.12:1.2.3-1.1build1
2:1.2.3-1.1ubuntu0.1
libxtst
Ubuntu:26.10
before 2:1.2.5-1ubuntu1, plus listed versions
2:1.2.5-1build1
2:1.2.5-1ubuntu1
libxtst
Ubuntu:26.04:LTS
before 2:1.2.5-1ubuntu0.1, plus listed versions
2:1.2.5-12:1.2.5-1build1
2:1.2.5-1ubuntu0.1
libxtst
Ubuntu:Pro:16.04:LTS
From an advisory covering 3 CVEs
before 2:1.2.2-1ubuntu0.1~esm1, plus listed versions
2:1.2.2-1
2:1.2.2-1ubuntu0.1~esm1
libxtst
Ubuntu:Pro:18.04:LTS
From an advisory covering 3 CVEs
before 2:1.2.3-1ubuntu0.18.04.1~esm1, plus listed versions
2:1.2.3-1
2:1.2.3-1ubuntu0.18.04.1~esm1
libxtst
Ubuntu:Pro:20.04:LTS
From an advisory covering 3 CVEs
before 2:1.2.3-1ubuntu0.20.04.1~esm1, plus listed versions
2:1.2.3-1
2:1.2.3-1ubuntu0.20.04.1~esm1
libxtst
Ubuntu:22.04:LTS
From an advisory covering 3 CVEs
before 2:1.2.3-1ubuntu0.22.04.1, plus listed versions
2:1.2.3-1build22:1.2.3-1build32:1.2.3-1build4
2:1.2.3-1ubuntu0.22.04.1
libxtst
Ubuntu:24.04:LTS
From an advisory covering 3 CVEs
before 2:1.2.3-1.1ubuntu0.1, plus listed versions
2:1.2.3-1.12:1.2.3-1.1build1
2:1.2.3-1.1ubuntu0.1
libxtst
Ubuntu:26.10
From an advisory covering 3 CVEs
before 2:1.2.5-1ubuntu1, plus listed versions
2:1.2.5-1build1
2:1.2.5-1ubuntu1
libxtst
Ubuntu:26.04:LTS
From an advisory covering 3 CVEs
before 2:1.2.5-1ubuntu0.1, plus listed versions
2:1.2.5-12:1.2.5-1build1
2:1.2.5-1ubuntu0.1
libXtst
openSUSE:Tumbleweed
before 1.2.5-2.1
1.2.5-2.1
libXtst
openSUSE:Leap 16.0
before 1.2.5-160000.4.1
1.2.5-160000.4.1

History

History
RecordedChangedSources
affectedOSV
affectedOSV
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-2026-94286 is a high vulnerability (CVSS 7.1) in X.org Libxtst, published September 28, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.20%, the 10th percentile. Fixed in libxtst 1.2.6-r0.

References

Show 36 moreShow less
MoveEnter Open