Vendor
X.Org
47 known vulnerabilities.
X.Org at a glance
- Last 12 months
- 34
- Critical · all time
- 1
- Exploited · all time
- 0
- Public exploit · all time
- 0
Show as table
| Month | Vulnerabilities | Critical |
|---|---|---|
| Nov 2026 | 0 | 0 |
| Oct 2026 | 15 | 0 |
| Sep 2026 | 14 | 0 |
| Aug 2026 | 0 | 0 |
| Jul 2026 | 5 | 1 |
| Jun 2026 | 0 | 0 |
| May 2026 | 0 | 0 |
| Apr 2026 | 0 | 0 |
| Mar 2026 | 0 | 0 |
| Feb 2026 | 0 | 0 |
| Jan 2026 | 0 | 0 |
| Dec 2025 | 0 | 0 |
| Nov 2025 | 0 | 0 |
| Oct 2025 | 3 | 0 |
| Sep 2025 | 0 | 0 |
| Aug 2025 | 0 | 0 |
| Jul 2025 | 0 | 0 |
| Jun 2025 | 6 | 0 |
| May 2025 | 0 | 0 |
| Apr 2025 | 0 | 0 |
| Mar 2025 | 1 | 0 |
| Feb 2025 | 0 | 0 |
| Jan 2025 | 0 | 0 |
| Dec 2024 | 0 | 0 |
Most common weaknesses
Products
47 results · Feed
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Medium 5.3
X.Org Server GestureBuildSprite Use-After-Free
A use after free caused by missing lifecycle management of gesture sprites in GestureBuildSprite() in X.Org X Server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to crash the X server or potentially execute code.
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Medium 6.9
X.Org Server XKB SetMap Key Width/Action Count Desync Out-Of-Bounds Read
A buffer overread in CheckKeySyms() in X.Org X Server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to leak small amounts of information from X server memory or potentially crash the X server.
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High 7.8
X.Org Server XInput2 PassiveUngrabDevice Out-of-Bounds Write
A heap buffer overflow caused by a XIPassiveUngrabDevice request with an out-of-range modifier value in X.Org X Server before 21.1.15 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in X server context.
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High 7.8
X.Org Server Glamor CopyArea Heap Buffer Overflow
A heap buffer overflow caused by mismatched size usage in CopyArea CPU-to-FBO path in X.Org X Server before 21.1.15 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in the X server context.
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High 7.8
X.Org Server RandR ChangeProviderProperty Heap Buffer Overflow
A buffer overflow in RandR ChangeProviderProperty requests in X.Org X Server before 2.1.25 and XWayland before 24.4.14 could be used by authenticated X clients to crash or execute code within the X server context.
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High 7.8
X.Org Server XKB ChangeKeycodeRange Heap Out-of-Bounds Write
A heap buffer overflow caused by mismatching size calculations between XkbAllocNames and ChangeKeycodeRange in X.org X server before 2.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in X server c…
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High 7.8
X.Org Server XFixes Pointer Barrier Event List Buffer Overflow
A buffer overflow when handling pointer barriers in the XFIXES extension in X.Org X server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to crash or potentially execute code in X server context.
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High 7.8
X.Org Server XKB ResizeKeyType Numeric Truncation
An integer truncation issue in XkbResizeKeyType() that could lead to a heap buffer overflow by authenticated X clients in X.org X server before 21.1.25 and XWayland before 24.1.14 could be exploited for crashes or potential code execution in the X server.
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High 8.5
X.Org Server GLX RenderLarge Heap Buffer Overflow
A heap buffer overflow in handling GLX RenderLarge request where dataBytes exceeds cmdlen in X.org X server before 21.1.25 and XWayland before 24.1.14 that could be be triggered by an authenticated X client could cause crashes or code execution in X server co…
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Medium 5.5
.Org Server XInput Passive Grab Use-After-Free
A use-after-free caused by lack of lifecycle management when adding / removing XInput master devices in X.org X Server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X Clients to crash the X server or potentially execute code in X s…
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Medium 6.8
.Org Server Present Extension Use-After-Free
A use-after-free in present_clear_window_notifies() in the X.org X Server before 21.1.25 and X Wayland before 24.1.14 could be used by malicious X clients to crash or potentially execute code in the X server context.
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High 7.8
X.Org Server XKB SetGeometry TextDoodad Double Free
A double free in XKB SetGeometryin X.Org X Server before 21.1.25 and X Wayland before 24.1.14 could be used by attached clients to cause a crash or potentially code in the x server context.
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High 7.5
libXi XGetDeviceControl DEVICE_ENABLE Heap Buffer Overflow
A malicious X server could cause a heap overflow by injecting a large DEVICE_ENABLE reply when processed by libXi before 1.8.4.
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Medium 6.5
libXtst RECORD EnableContext Reply Endless Loop
A malicious X server could send malformed RECORD EnableContext reolies that can cause a X client using the parse_reply_call_callback function in libXtst before 1.2.6 to enter a endless loop.
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High 7.5
libXi XGetDeviceControl Control Type Mismatch Heap Buffer Overflow
A buffer overflow when handling DEVICE_RESOLUTION in libXi before 1.8.4 could overflow a heap, triggered by a malicious X server.
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Medium 5.5
Denial of service via unsigned underflow in libXpm's write path
A denial of service via unsigned underflow in libXpm's write path in libXpm before 3.5.19 could be used by local attackers to cause unbounded CPU usage and memory exhaustion.
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High 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.
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Medium 5.1
Out-of-bounds read in libX11's byte-oriented codeset parser
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.
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Medium 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.
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Medium 6.5
Out-of-bounds read vulnerability in libX11's XIM (X Input Method) attribute parser
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.
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Medium 5.6
Out-of-bounds read in libXi's XI2 enter/leave/focus cookie conversion
An out-of-bounds read in libXi's XI2 enter/leave/focus cookie conversion in libXi before 1.8.4 could be used by malicious X server to crash an attached X client.
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Medium 6.5
Out-of-bounds read in libXi's XListInputDevices() class parsing
An out-of-bounds read in libXi's XListInputDevices() class parsing in libXi before 1.8.4 could be used by malicious X servers to crash an attached X client.
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Medium 6.5
Out-of-bounds read in libXi's XListInputDevices()
An out-of-bounds read in libXi's XListInputDevices() in libXi before 1.8.4 could be used by malicious X servers to crash an attached X client.
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Medium 6.5
Out-of-bounds read in libXi's XI2 XIQueryDevice reply parsing
An out-of-bounds read in libXi's XI2 XIQueryDevice reply parsing in libXi before 1.8.4 can be used by a malicious X server to crash an attached X client.
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High 7.4
Out-of-bounds read in libXi's XI2 class parser
An out-of-bounds read in libXi's XI2 class parser in libXi before 1.8.4 could be used by malicious X servers to crash an attached X client.
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Medium 6.5
Out-of-bounds read in libXi's XI2 class parsing via size_classes() and copy_classes()
An out-of-bounds read in libXi's XI2 class parsing via size_classes() and copy_classes() in libXi before 1.8.4 could be used by malicous servers to crash the X client.
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Medium 6.5
Out-of-bounds read in libXi's XQueryDeviceState()
An out-of-bounds read in libXi's XQueryDeviceState() in libXi before 1.8.4 could be used by a
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High 8.9
libXrender RenderQueryPictFormats Reply Heap-based Buffer Overflow
A heap overflow in libXrender before 0.9.13 in RenderQueryPictFormats could be used by malicious X servers to inject code into attached X clients.
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High 7.5
libX11 XkbGetMap Reply Heap-based Buffer Overflow
A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map.
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High 8.5
libXfont2 computeProps Property Buffer Heap Buffer Overflow
A heap buffer overflow due to missing size checking in the property buffer when parsing PCF files in libXfont2 ComputeScaledProperties() before libXfont2 before 2.0.8 could be used by attackers using authenticated X clients to execute code within the X server.
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High 8.5
libXfont2 PCF Font Parsing Heap Buffer Overflow
A heap bufferflow in pcfReadFont() due to missing glyph bounds checking in libXfont2 before 2.0.8 allows attackers authenticated as X client to execute code within the X server.
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High 8.5
libXfont2 BitmapScaleBitmaps Integer Overflow Heap Buffer Overflow
A heap buffer overflow in BitmapScaleBitmaps in libXfont2 before 2.0.8 due to an overflowing 32bit size could be used by attackers able to access the X Server to execute code within the X server cont
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High 8.5
xorg-server / xwayland glamor font atlas Heap Buffer Overflow
Local attackers with a X connection able to provide PCX fonts to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a heap buffer overflow via SetFont due to missing glyph boundary checks.
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Critical 9.0
xorg-x11-server / xwayland GLX contextTags Use-After-Free in CommonMakeCurrent()
Local attackers with a X connection able to provide GLX commit to the X server xorg-server before 21.2.24 and xwayland before 24.1.13 could cause a Heap Use After Free, due to CommonMakeCurrent() pointing into potentially reallocated memory.
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High 7.3
Xorg: xmayland: use-after-free in xpresentnotify structure creation
A flaw was found in the X.Org X server and Xwayland when processing X11 Present extension notifications. Improper error handling during notification creation can leave dangling pointers that lead to a use-after-free condition. This can cause memory corruption…
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High 7.3
Xorg: xwayland: use-after-free in xkb client resource removal
A flaw was discovered in the X.Org X server’s X Keyboard (Xkb) extension when handling client resource cleanup. The software frees certain data structures without properly detaching related resources, leading to a use-after-free condition. This can cause memo…
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High 7.3
Xorg: xmayland: value overflow in xkbsetcompatmap()
A flaw was identified in the X.Org X server’s X Keyboard (Xkb) extension where improper bounds checking in the XkbSetCompatMap() function can cause an unsigned short overflow. If an attacker sends specially crafted input data, the value calculation may overfl…
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High 7.8
Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: integer overflow in x resize, rotate and reflect (randr) extension
A flaw was found in the RandR extension, where the RRChangeProviderProperty function does not properly validate input. This issue leads to an integer overflow when computing the total size to allocate.
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High 7.3
Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: integer overflow in x record extension
A flaw was found in the X Record extension. The RecordSanityCheckRegisterClients function does not check for an integer overflow when computing request length, which allows a client to bypass length checks.
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Medium 5.5
Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: unprocessed client request due to bytes to ignore
A flaw was found in the X server's request handling. Non-zero 'bytes to ignore' in a client's request can cause the server to skip processing another client's request, potentially leading to a denial of service.