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38 vulnerabilities found for libX11 by x.org
CVE-2026-94285 (GCVE-0-2026-94285)
Vulnerability from nvd – Published: 2026-09-28 08:45 – Updated: 2026-09-28 08:45
VLAI
EPSS
VEX
Title
Out-of-bounds read in libX11's byte-oriented codeset parser
Summary
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.
Severity
5.1 (Medium)
CWE
- CWE-125 - Out-of-bounds read
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://gitlab.freedesktop.org/xorg/lib/libx11/-/… | patch |
Impacted products
Date Public
2026-09-28 08:43
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CVE-2026-94284 (GCVE-0-2026-94284)
Vulnerability from nvd – Published: 2026-09-28 08:42 – Updated: 2026-09-30 12:48
VLAI
EPSS
VEX
Title
Out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser
Summary
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.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 12:46 UTC
CWE
- CWE-125 - Out-of-bounds read
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://gitlab.freedesktop.org/xorg/lib/libx11/-/… | patch |
Impacted products
Date Public
2026-09-28 08:34
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CVE-2026-94283 (GCVE-0-2026-94283)
Vulnerability from nvd – Published: 2026-09-28 08:34 – Updated: 2026-09-30 12:44
VLAI
EPSS
VEX
Title
Out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser
Summary
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.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 12:43 UTC
CWE
- CWE-125 - Out-of-bounds read
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://gitlab.freedesktop.org/xorg/lib/libx11/-/… | patch |
Impacted products
Date Public
2026-09-28 08:31
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CVE-2026-88806 (GCVE-0-2026-88806)
Vulnerability from nvd – Published: 2026-09-21 13:42 – Updated: 2026-09-22 03:55
VLAI
EPSS
VEX
Title
libX11 XkbGetMap Reply Heap-based Buffer Overflow
Summary
A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-21 00:00 UTC
CWE
- CWE-122 - Heap-based buffer overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://gitlab.freedesktop.org/xorg/lib/libx11/-/… | patch |
Impacted products
Date Public
2026-09-18 13:33
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CVE-2023-43787 (GCVE-0-2023-43787)
Vulnerability from nvd – Published: 2023-10-10 12:26 – Updated: 2025-11-06 22:59
VLAI
EPSS
VEX
Title
Libx11: integer overflow in xcreateimage() leading to a heap overflow
Summary
A vulnerability was found in libX11 due to an integer overflow within the XCreateImage() function. This flaw allows a local user to trigger an integer overflow and execute arbitrary code with elevated privileges.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-01-29 18:42 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2024:2145 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2024:2973 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2023-43787 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2242254 | issue-trackingx_refsource_REDHAT |
| http://www.openwall.com/lists/oss-security/2024/01/24/9 | x_transferred |
| https://jfrog.com/blog/xorg-libx11-vulns-cve-2023… | x_transferred |
| https://security.netapp.com/advisory/ntap-2023110… | x_transferred |
| https://lists.debian.org/debian-lts-announce/2023… |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
0 , < 1.8.7
(semver)
|
|||
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:1.6.8-8.el8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8::appstream |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:1.7.0-9.el9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
Date Public
2023-10-04 00:00
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CVE-2023-43786 (GCVE-0-2023-43786)
Vulnerability from nvd – Published: 2023-10-10 12:26 – Updated: 2025-11-06 22:59
VLAI
EPSS
VEX
Title
Libx11: stack exhaustion from infinite recursion in putsubimage()
Summary
A vulnerability was found in libX11 due to an infinite loop within the PutSubImage() function. This flaw allows a local user to consume all available system resources and cause a denial of service condition.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-04-25 16:06 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2024:2145 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2024:2973 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2023-43786 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2242253 | issue-trackingx_refsource_REDHAT |
| http://www.openwall.com/lists/oss-security/2024/01/24/9 | x_transferred |
| https://lists.fedoraproject.org/archives/list/pac… | x_transferred |
| https://security.netapp.com/advisory/ntap-2023110… | x_transferred |
| https://lists.debian.org/debian-lts-announce/2023… |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
0 , < 3.5.17
(semver)
|
|||
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:1.6.8-8.el8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8::appstream |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:1.7.0-9.el9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
Date Public
2023-10-04 00:00
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CVE-2023-43785 (GCVE-0-2023-43785)
Vulnerability from nvd – Published: 2023-10-10 12:26 – Updated: 2025-11-06 22:59
VLAI
EPSS
VEX
Title
Libx11: out-of-bounds memory access in _xkbreadkeysyms()
Summary
A vulnerability was found in libX11 due to a boundary condition within the _XkbReadKeySyms() function. This flaw allows a local user to trigger an out-of-bounds read error and read the contents of memory on the system.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-04-25 15:44 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2024:2145 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2024:2973 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2023-43785 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2242252 | issue-trackingx_refsource_REDHAT |
| https://security.netapp.com/advisory/ntap-2023110… | x_transferred |
| https://lists.debian.org/debian-lts-announce/2023… |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
0 , < 1.8.7
(semver)
|
|||
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:1.6.8-8.el8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8::appstream |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:1.7.0-9.el9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
Date Public
2023-10-04 00:00
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CVE-2023-3138 (GCVE-0-2023-3138)
Vulnerability from nvd – Published: 2023-06-28 00:00 – Updated: 2024-08-02 06:48
VLAI
EPSS
VEX
Summary
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.
Severity
No CVSS data available.
CWE
Assigner
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CVE-2021-31535 (GCVE-0-2021-31535)
Vulnerability from nvd – Published: 2021-05-27 12:26 – Updated: 2024-08-03 23:03
VLAI
EPSS
VEX
Summary
LookupCol.c in X.Org X through X11R7.7 and libX11 before 1.7.1 might allow remote attackers to execute arbitrary code. The libX11 XLookupColor request (intended for server-side color lookup) contains a flaw allowing a client to send color-name requests with a name longer than the maximum size allowed by the protocol (and also longer than the maximum packet size for normal-sized packets). The user-controlled data exceeding the maximum size is then interpreted by the server as additional X protocol requests and executed, e.g., to disable X server authorization completely. For example, if the victim encounters malicious terminal control sequences for color codes, then the attacker may be able to take full control of the running graphical session.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
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CVE-2020-14363 (GCVE-0-2020-14363)
Vulnerability from nvd – Published: 2020-09-11 18:02 – Updated: 2024-08-04 12:46
VLAI
EPSS
VEX
Summary
An integer overflow vulnerability leading to a double-free was found in libX11. This flaw allows a local privileged attacker to cause an application compiled with libX11 to crash, or in some cases, result in arbitrary code execution. The highest threat from this flaw is to confidentiality, integrity as well as system availability.
Severity
7.8 (High)
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/Ruia-ruia/Exploits/blob/master… | x_refsource_MISC |
| https://github.com/Ruia-ruia/Exploits/blob/master… | x_refsource_MISC |
| https://lists.x.org/archives/xorg-announce/2020-A… | x_refsource_MISC |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… | x_refsource_CONFIRM |
| https://usn.ubuntu.com/4487-2/ | vendor-advisoryx_refsource_UBUNTU |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The X11 Project | libX11 |
Affected:
1.6.12
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CVE-2020-14344 (GCVE-0-2020-14344)
Vulnerability from nvd – Published: 2020-08-05 13:08 – Updated: 2024-08-04 12:39
VLAI
EPSS
VEX
Summary
An integer overflow leading to a heap-buffer overflow was found in The X Input Method (XIM) client was implemented in libX11 before version 1.6.10. As per upstream this is security relevant when setuid programs call XIM client functions while running with elevated privileges. No such programs are shipped with Red Hat Enterprise Linux.
Severity
6.7 (Medium)
CWE
Assigner
References
13 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The X11 Project | libX11 |
Affected:
1.6.10
|
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CVE-2018-14600 (GCVE-0-2018-14600)
Vulnerability from nvd – Published: 2018-08-24 19:00 – Updated: 2024-08-05 09:29
VLAI
EPSS
VEX
Summary
An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c interprets a variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading to DoS or remote code execution.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
11 references
| URL | Tags |
|---|---|
| https://usn.ubuntu.com/3758-2/ | vendor-advisoryx_refsource_UBUNTU |
| https://security.gentoo.org/glsa/201811-01 | vendor-advisoryx_refsource_GENTOO |
| http://www.securityfocus.com/bid/105177 | vdb-entryx_refsource_BID |
| https://bugzilla.suse.com/show_bug.cgi?id=1102068 | x_refsource_CONFIRM |
| http://www.openwall.com/lists/oss-security/2018/08/21/6 | mailing-listx_refsource_MLIST |
| http://www.securitytracker.com/id/1041543 | vdb-entryx_refsource_SECTRACK |
| https://cgit.freedesktop.org/xorg/lib/libX11/comm… | x_refsource_CONFIRM |
| https://lists.debian.org/debian-lts-announce/2018… | mailing-listx_refsource_MLIST |
| https://lists.x.org/archives/xorg-announce/2018-A… | mailing-listx_refsource_MLIST |
| https://usn.ubuntu.com/3758-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://access.redhat.com/errata/RHSA-2019:2079 | vendor-advisoryx_refsource_REDHAT |
Date Public
2018-08-21 00:00
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CVE-2018-14599 (GCVE-0-2018-14599)
Vulnerability from nvd – Published: 2018-08-24 19:00 – Updated: 2024-08-05 09:29
VLAI
EPSS
VEX
Summary
An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable to an off-by-one error caused by malicious server responses, leading to DoS or possibly unspecified other impact.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://usn.ubuntu.com/3758-2/ | vendor-advisoryx_refsource_UBUNTU |
| https://bugzilla.suse.com/show_bug.cgi?id=1102062 | x_refsource_CONFIRM |
| https://cgit.freedesktop.org/xorg/lib/libX11/comm… | x_refsource_CONFIRM |
| https://security.gentoo.org/glsa/201811-01 | vendor-advisoryx_refsource_GENTOO |
| http://www.securityfocus.com/bid/105177 | vdb-entryx_refsource_BID |
| http://www.openwall.com/lists/oss-security/2018/08/21/6 | mailing-listx_refsource_MLIST |
| http://www.securitytracker.com/id/1041543 | vdb-entryx_refsource_SECTRACK |
| https://lists.debian.org/debian-lts-announce/2018… | mailing-listx_refsource_MLIST |
| https://lists.x.org/archives/xorg-announce/2018-A… | mailing-listx_refsource_MLIST |
| https://usn.ubuntu.com/3758-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://access.redhat.com/errata/RHSA-2019:2079 | vendor-advisoryx_refsource_REDHAT |
Date Public
2018-08-21 00:00
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CVE-2018-14598 (GCVE-0-2018-14598)
Vulnerability from nvd – Published: 2018-08-24 19:00 – Updated: 2024-08-05 09:29
VLAI
EPSS
VEX
Summary
An issue was discovered in XListExtensions in ListExt.c in libX11 through 1.6.5. A malicious server can send a reply in which the first string overflows, causing a variable to be set to NULL that will be freed later on, leading to DoS (segmentation fault).
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://usn.ubuntu.com/3758-2/ | vendor-advisoryx_refsource_UBUNTU |
| https://bugzilla.suse.com/show_bug.cgi?id=1102073 | x_refsource_CONFIRM |
| https://security.gentoo.org/glsa/201811-01 | vendor-advisoryx_refsource_GENTOO |
| http://www.securityfocus.com/bid/105177 | vdb-entryx_refsource_BID |
| https://cgit.freedesktop.org/xorg/lib/libX11/comm… | x_refsource_CONFIRM |
| http://www.openwall.com/lists/oss-security/2018/08/21/6 | mailing-listx_refsource_MLIST |
| http://www.securitytracker.com/id/1041543 | vdb-entryx_refsource_SECTRACK |
| https://lists.debian.org/debian-lts-announce/2018… | mailing-listx_refsource_MLIST |
| https://lists.x.org/archives/xorg-announce/2018-A… | mailing-listx_refsource_MLIST |
| https://usn.ubuntu.com/3758-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://access.redhat.com/errata/RHSA-2019:2079 | vendor-advisoryx_refsource_REDHAT |
Date Public
2018-08-21 00:00
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CVE-2016-7943 (GCVE-0-2016-7943)
Vulnerability from nvd – Published: 2016-12-13 20:00 – Updated: 2024-08-06 02:13
VLAI
EPSS
VEX
Summary
The XListFonts function in X.org libX11 before 1.6.4 might allow remote X servers to gain privileges via vectors involving length fields, which trigger out-of-bounds write operations.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
10 references
| URL | Tags |
|---|---|
| http://www.securitytracker.com/id/1036945 | vdb-entryx_refsource_SECTRACK |
| https://usn.ubuntu.com/3758-2/ | vendor-advisoryx_refsource_UBUNTU |
| https://cgit.freedesktop.org/xorg/lib/libX11/comm… | x_refsource_CONFIRM |
| https://security.gentoo.org/glsa/201704-03 | vendor-advisoryx_refsource_GENTOO |
| https://lists.x.org/archives/xorg-announce/2016-O… | mailing-listx_refsource_MLIST |
| http://www.openwall.com/lists/oss-security/2016/10/04/4 | mailing-listx_refsource_MLIST |
| http://www.openwall.com/lists/oss-security/2016/10/04/2 | mailing-listx_refsource_MLIST |
| http://www.securityfocus.com/bid/93362 | vdb-entryx_refsource_BID |
| https://usn.ubuntu.com/3758-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
Date Public
2016-10-04 00:00
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CVE-2016-7942 (GCVE-0-2016-7942)
Vulnerability from nvd – Published: 2016-12-13 20:00 – Updated: 2024-08-06 02:13
VLAI
EPSS
VEX
Summary
The XGetImage function in X.org libX11 before 1.6.4 might allow remote X servers to gain privileges via vectors involving image type and geometry, which triggers out-of-bounds read operations.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
10 references
| URL | Tags |
|---|---|
| http://www.securitytracker.com/id/1036945 | vdb-entryx_refsource_SECTRACK |
| https://usn.ubuntu.com/3758-2/ | vendor-advisoryx_refsource_UBUNTU |
| https://security.gentoo.org/glsa/201704-03 | vendor-advisoryx_refsource_GENTOO |
| http://www.securityfocus.com/bid/93363 | vdb-entryx_refsource_BID |
| https://lists.x.org/archives/xorg-announce/2016-O… | mailing-listx_refsource_MLIST |
| http://www.openwall.com/lists/oss-security/2016/10/04/4 | mailing-listx_refsource_MLIST |
| http://www.openwall.com/lists/oss-security/2016/10/04/2 | mailing-listx_refsource_MLIST |
| https://usn.ubuntu.com/3758-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://cgit.freedesktop.org/xorg/lib/libX11/comm… | x_refsource_CONFIRM |
Date Public
2016-10-04 00:00
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CVE-2026-94285 (GCVE-0-2026-94285)
Vulnerability from cvelistv5 – Published: 2026-09-28 08:45 – Updated: 2026-09-28 08:45
VLAI
EPSS
VEX
Title
Out-of-bounds read in libX11's byte-oriented codeset parser
Summary
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.
Severity
5.1 (Medium)
CWE
- CWE-125 - Out-of-bounds read
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://gitlab.freedesktop.org/xorg/lib/libx11/-/… | patch |
Impacted products
Date Public
2026-09-28 08:43
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CVE-2026-94284 (GCVE-0-2026-94284)
Vulnerability from cvelistv5 – Published: 2026-09-28 08:42 – Updated: 2026-09-30 12:48
VLAI
EPSS
VEX
Title
Out-of-bounds read vulnerability in libX11's XIM trigger-keyregistration parser.registration parser
Summary
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.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 12:46 UTC
CWE
- CWE-125 - Out-of-bounds read
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://gitlab.freedesktop.org/xorg/lib/libx11/-/… | patch |
Impacted products
Date Public
2026-09-28 08:34
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CVE-2026-94283 (GCVE-0-2026-94283)
Vulnerability from cvelistv5 – Published: 2026-09-28 08:34 – Updated: 2026-09-30 12:44
VLAI
EPSS
VEX
Title
Out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser
Summary
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.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 12:43 UTC
CWE
- CWE-125 - Out-of-bounds read
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://gitlab.freedesktop.org/xorg/lib/libx11/-/… | patch |
Impacted products
Date Public
2026-09-28 08:31
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CVE-2026-88806 (GCVE-0-2026-88806)
Vulnerability from cvelistv5 – Published: 2026-09-21 13:42 – Updated: 2026-09-22 03:55
VLAI
EPSS
VEX
Title
libX11 XkbGetMap Reply Heap-based Buffer Overflow
Summary
A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-21 00:00 UTC
CWE
- CWE-122 - Heap-based buffer overflow
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://gitlab.freedesktop.org/xorg/lib/libx11/-/… | patch |
Impacted products
Date Public
2026-09-18 13:33
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CVE-2023-43787 (GCVE-0-2023-43787)
Vulnerability from cvelistv5 – Published: 2023-10-10 12:26 – Updated: 2025-11-06 22:59
VLAI
EPSS
VEX
Title
Libx11: integer overflow in xcreateimage() leading to a heap overflow
Summary
A vulnerability was found in libX11 due to an integer overflow within the XCreateImage() function. This flaw allows a local user to trigger an integer overflow and execute arbitrary code with elevated privileges.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-01-29 18:42 UTC
CWE
- CWE-122 - Heap-based Buffer Overflow
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2024:2145 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2024:2973 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2023-43787 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2242254 | issue-trackingx_refsource_REDHAT |
| http://www.openwall.com/lists/oss-security/2024/01/24/9 | x_transferred |
| https://jfrog.com/blog/xorg-libx11-vulns-cve-2023… | x_transferred |
| https://security.netapp.com/advisory/ntap-2023110… | x_transferred |
| https://lists.debian.org/debian-lts-announce/2023… |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
0 , < 1.8.7
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|
|||
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:1.6.8-8.el8 , < *
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cpe:/a:redhat:enterprise_linux:8::appstream |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:1.7.0-9.el9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
Date Public
2023-10-04 00:00
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CVE-2023-43786 (GCVE-0-2023-43786)
Vulnerability from cvelistv5 – Published: 2023-10-10 12:26 – Updated: 2025-11-06 22:59
VLAI
EPSS
VEX
Title
Libx11: stack exhaustion from infinite recursion in putsubimage()
Summary
A vulnerability was found in libX11 due to an infinite loop within the PutSubImage() function. This flaw allows a local user to consume all available system resources and cause a denial of service condition.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-04-25 16:06 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2024:2145 | vendor-advisoryx_refsource_REDHAT |
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| https://bugzilla.redhat.com/show_bug.cgi?id=2242253 | issue-trackingx_refsource_REDHAT |
| http://www.openwall.com/lists/oss-security/2024/01/24/9 | x_transferred |
| https://lists.fedoraproject.org/archives/list/pac… | x_transferred |
| https://security.netapp.com/advisory/ntap-2023110… | x_transferred |
| https://lists.debian.org/debian-lts-announce/2023… |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
0 , < 3.5.17
(semver)
|
|||
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
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|
| Red Hat | Red Hat Enterprise Linux 9 |
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0:1.7.0-9.el9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
Date Public
2023-10-04 00:00
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CVE-2023-43785 (GCVE-0-2023-43785)
Vulnerability from cvelistv5 – Published: 2023-10-10 12:26 – Updated: 2025-11-06 22:59
VLAI
EPSS
VEX
Title
Libx11: out-of-bounds memory access in _xkbreadkeysyms()
Summary
A vulnerability was found in libX11 due to a boundary condition within the _XkbReadKeySyms() function. This flaw allows a local user to trigger an out-of-bounds read error and read the contents of memory on the system.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-04-25 15:44 UTC
CWE
- CWE-787 - Out-of-bounds Write
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2024:2145 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2024:2973 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/security/cve/CVE-2023-43785 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2242252 | issue-trackingx_refsource_REDHAT |
| https://security.netapp.com/advisory/ntap-2023110… | x_transferred |
| https://lists.debian.org/debian-lts-announce/2023… |
Impacted products
5 products
| Vendor | Product | Version | |
|---|---|---|---|
|
Affected:
0 , < 1.8.7
(semver)
|
|||
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
0:1.6.8-8.el8 , < *
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cpe:/a:redhat:enterprise_linux:8::appstream |
|
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
0:1.7.0-9.el9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9::appstream |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
Date Public
2023-10-04 00:00
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CVE-2023-3138 (GCVE-0-2023-3138)
Vulnerability from cvelistv5 – Published: 2023-06-28 00:00 – Updated: 2024-08-02 06:48
VLAI
EPSS
VEX
Summary
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.
Severity
No CVSS data available.
CWE
Assigner
References
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CVE-2021-31535 (GCVE-0-2021-31535)
Vulnerability from cvelistv5 – Published: 2021-05-27 12:26 – Updated: 2024-08-03 23:03
VLAI
EPSS
VEX
Summary
LookupCol.c in X.Org X through X11R7.7 and libX11 before 1.7.1 might allow remote attackers to execute arbitrary code. The libX11 XLookupColor request (intended for server-side color lookup) contains a flaw allowing a client to send color-name requests with a name longer than the maximum size allowed by the protocol (and also longer than the maximum packet size for normal-sized packets). The user-controlled data exceeding the maximum size is then interpreted by the server as additional X protocol requests and executed, e.g., to disable X server authorization completely. For example, if the victim encounters malicious terminal control sequences for color codes, then the attacker may be able to take full control of the running graphical session.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
19 references
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CVE-2020-14363 (GCVE-0-2020-14363)
Vulnerability from cvelistv5 – Published: 2020-09-11 18:02 – Updated: 2024-08-04 12:46
VLAI
EPSS
VEX
Summary
An integer overflow vulnerability leading to a double-free was found in libX11. This flaw allows a local privileged attacker to cause an application compiled with libX11 to crash, or in some cases, result in arbitrary code execution. The highest threat from this flaw is to confidentiality, integrity as well as system availability.
Severity
7.8 (High)
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://github.com/Ruia-ruia/Exploits/blob/master… | x_refsource_MISC |
| https://github.com/Ruia-ruia/Exploits/blob/master… | x_refsource_MISC |
| https://lists.x.org/archives/xorg-announce/2020-A… | x_refsource_MISC |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… | x_refsource_CONFIRM |
| https://usn.ubuntu.com/4487-2/ | vendor-advisoryx_refsource_UBUNTU |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The X11 Project | libX11 |
Affected:
1.6.12
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CVE-2020-14344 (GCVE-0-2020-14344)
Vulnerability from cvelistv5 – Published: 2020-08-05 13:08 – Updated: 2024-08-04 12:39
VLAI
EPSS
VEX
Summary
An integer overflow leading to a heap-buffer overflow was found in The X Input Method (XIM) client was implemented in libX11 before version 1.6.10. As per upstream this is security relevant when setuid programs call XIM client functions while running with elevated privileges. No such programs are shipped with Red Hat Enterprise Linux.
Severity
6.7 (Medium)
CWE
Assigner
References
13 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The X11 Project | libX11 |
Affected:
1.6.10
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CVE-2018-14598 (GCVE-0-2018-14598)
Vulnerability from cvelistv5 – Published: 2018-08-24 19:00 – Updated: 2024-08-05 09:29
VLAI
EPSS
VEX
Summary
An issue was discovered in XListExtensions in ListExt.c in libX11 through 1.6.5. A malicious server can send a reply in which the first string overflows, causing a variable to be set to NULL that will be freed later on, leading to DoS (segmentation fault).
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://usn.ubuntu.com/3758-2/ | vendor-advisoryx_refsource_UBUNTU |
| https://bugzilla.suse.com/show_bug.cgi?id=1102073 | x_refsource_CONFIRM |
| https://security.gentoo.org/glsa/201811-01 | vendor-advisoryx_refsource_GENTOO |
| http://www.securityfocus.com/bid/105177 | vdb-entryx_refsource_BID |
| https://cgit.freedesktop.org/xorg/lib/libX11/comm… | x_refsource_CONFIRM |
| http://www.openwall.com/lists/oss-security/2018/08/21/6 | mailing-listx_refsource_MLIST |
| http://www.securitytracker.com/id/1041543 | vdb-entryx_refsource_SECTRACK |
| https://lists.debian.org/debian-lts-announce/2018… | mailing-listx_refsource_MLIST |
| https://lists.x.org/archives/xorg-announce/2018-A… | mailing-listx_refsource_MLIST |
| https://usn.ubuntu.com/3758-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://access.redhat.com/errata/RHSA-2019:2079 | vendor-advisoryx_refsource_REDHAT |
Date Public
2018-08-21 00:00
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CVE-2018-14599 (GCVE-0-2018-14599)
Vulnerability from cvelistv5 – Published: 2018-08-24 19:00 – Updated: 2024-08-05 09:29
VLAI
EPSS
VEX
Summary
An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable to an off-by-one error caused by malicious server responses, leading to DoS or possibly unspecified other impact.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
12 references
| URL | Tags |
|---|---|
| https://usn.ubuntu.com/3758-2/ | vendor-advisoryx_refsource_UBUNTU |
| https://bugzilla.suse.com/show_bug.cgi?id=1102062 | x_refsource_CONFIRM |
| https://cgit.freedesktop.org/xorg/lib/libX11/comm… | x_refsource_CONFIRM |
| https://security.gentoo.org/glsa/201811-01 | vendor-advisoryx_refsource_GENTOO |
| http://www.securityfocus.com/bid/105177 | vdb-entryx_refsource_BID |
| http://www.openwall.com/lists/oss-security/2018/08/21/6 | mailing-listx_refsource_MLIST |
| http://www.securitytracker.com/id/1041543 | vdb-entryx_refsource_SECTRACK |
| https://lists.debian.org/debian-lts-announce/2018… | mailing-listx_refsource_MLIST |
| https://lists.x.org/archives/xorg-announce/2018-A… | mailing-listx_refsource_MLIST |
| https://usn.ubuntu.com/3758-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://access.redhat.com/errata/RHSA-2019:2079 | vendor-advisoryx_refsource_REDHAT |
Date Public
2018-08-21 00:00
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CVE-2018-14600 (GCVE-0-2018-14600)
Vulnerability from cvelistv5 – Published: 2018-08-24 19:00 – Updated: 2024-08-05 09:29
VLAI
EPSS
VEX
Summary
An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c interprets a variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading to DoS or remote code execution.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
11 references
| URL | Tags |
|---|---|
| https://usn.ubuntu.com/3758-2/ | vendor-advisoryx_refsource_UBUNTU |
| https://security.gentoo.org/glsa/201811-01 | vendor-advisoryx_refsource_GENTOO |
| http://www.securityfocus.com/bid/105177 | vdb-entryx_refsource_BID |
| https://bugzilla.suse.com/show_bug.cgi?id=1102068 | x_refsource_CONFIRM |
| http://www.openwall.com/lists/oss-security/2018/08/21/6 | mailing-listx_refsource_MLIST |
| http://www.securitytracker.com/id/1041543 | vdb-entryx_refsource_SECTRACK |
| https://cgit.freedesktop.org/xorg/lib/libX11/comm… | x_refsource_CONFIRM |
| https://lists.debian.org/debian-lts-announce/2018… | mailing-listx_refsource_MLIST |
| https://lists.x.org/archives/xorg-announce/2018-A… | mailing-listx_refsource_MLIST |
| https://usn.ubuntu.com/3758-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://access.redhat.com/errata/RHSA-2019:2079 | vendor-advisoryx_refsource_REDHAT |
Date Public
2018-08-21 00:00
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