X.org has 32 CVEs on record between 2023 and 2026. Disclosure cadence is accelerating: 18 in the last 90 days against 9 in the 90 before. The busiest recent month was September 2026 with 14. The median CVSS is 7.3 (high). None have a confirmed exploitation report. The dominant weakness classes are CWE-125 (13) and CWE-416 (6). Most affected products: x_server (14), libXi (9), libX11 (4).
CVEs per month
Last 12 months, by publish date
- Exploited share
- 0% vs 1% corpus
- Median CVSS
- 7.3
- Publish → KEV
- —
- Last 90 days
- 18 prev 9
Weakness classes
Products
- x_server 14
- libXi 9
- libX11 4
- libXtst 2
- libXpm 1
- libXrender 1
Worst active — by depth score
CVE-2026-88807High· 8.9A heap overflow in libXrender before 0.9.13 in RenderQueryPictFormats could be used by malicious X servers to inject code into attached X clients.49CVE-2026-88812High· 7.8X.Org Server XKB SetGeometry TextDoodad Double Free43CVE-2026-50264High· 7.8An out-of-bounds write flaw was found in the X.Org X server and Xwayland in DRIGetBuffers/DRIGetBuffersWithFormat43CVE-2026-50261High· 7.8A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter()43CVE-2026-50260High· 7.8A use-after-free flaw was found in the X.Org X server and Xwayland in FreeCounter()43
X.org vulnerabilities
CVEs affecting X.org, newest first. Open any entry for full detail, references, and exploit status.
32 CVEsRSS
CVE-2026-88812High· 7.8X.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.
CVE-2026-109088Medium· 6.5libXtst 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.
CVE-2026-109090High· 7.5libXi 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.
CVE-2026-109089High· 7.5libXi 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.
CVE-2026-94287Medium· 5.5A 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.
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.
CVE-2026-94282Medium· 5.6An 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.
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.
CVE-2026-94284Medium· 5.5An 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.
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-2026-94283Medium· 6.5An 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.
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-2026-94285Medium· 5.1An 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.
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-2026-94286High· 7.1An 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.
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-2026-93542Medium· 6.5An 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.
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.
CVE-2026-93543High· 7.4An 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.
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.
CVE-2026-93544Medium· 6.5An 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.
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.
CVE-2026-93545Medium· 6.5An 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.
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.
CVE-2026-94281Medium· 6.5An 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.
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.
CVE-2026-93541Medium· 6.5An out-of-bounds read in libXi's XQueryDeviceState() in libXi before 1.8.4 could be used by a
An out-of-bounds read in libXi's XQueryDeviceState() in libXi before 1.8.4 could be used by a
CVE-2026-88807High· 8.9A heap overflow in libXrender before 0.9.13 in RenderQueryPictFormats could be used by malicious X servers to inject code into attached X clients.
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.
CVE-2026-88806High· 7.5A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map.
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-2026-50264High· 7.8An out-of-bounds write flaw was found in the X.Org X server and Xwayland in DRIGetBuffers/DRIGetBuffersWithFormat
An out-of-bounds write flaw was found in the X.Org X server and Xwayland in DRIGetBuffers/DRIGetBuffersWithFormat. A client that requests multiple DRI2BufferBackLeft attachments and one DRI2BufferFrontLeft can trigger an out-of-bounds he…
CVE-2026-50263Medium· 5.5A use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow()
A use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow(). A client can trigger a use-after-free read after changing window attributes and forcing the screen saver, leading to information disclosure.
CVE-2026-50262Medium· 5.5An out-of-bounds read flaw was found in the X.Org X server and Xwayland in __glXDisp_ChangeDrawableAttributes()
An out-of-bounds read flaw was found in the X.Org X server and Xwayland in __glXDisp_ChangeDrawableAttributes(). A wrong size validation check can read a client-controlled number of bytes, exceeding the request buffer, leading to informa…
CVE-2026-50261High· 7.8A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter()
A use-after-free flaw was found in the X.Org X server and Xwayland in SyncChangeCounter(). A client that sets up multiple SyncCounters can trigger a use-after-free when destroying those counters via a second client connection while chang…
CVE-2026-50260High· 7.8A use-after-free flaw was found in the X.Org X server and Xwayland in FreeCounter()
A use-after-free flaw was found in the X.Org X server and Xwayland in FreeCounter(). A client that sets up multiple SyncCounters and awaits on those triggers can trigger a use-after-free when destroying those counters via a second client…
CVE-2026-50259High· 7.8A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland
A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. _XkbSetMapChecks() declares a fixed-size stack buffer mapWidths[256] indexed by key type index. The helper function CheckKeyTypes() writes to this buffer at…
CVE-2026-50258High· 7.8A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland
A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. The X server has multiple stack buffers sized XkbMaxShiftLevel * XkbNumKbdGroups but CheckKeyTypes() does not verify or clamp non-canonical key types to Xkb…
CVE-2026-50257High· 7.8A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence()
A use-after-free flaw was found in the X.Org X server and Xwayland in miSyncDestroyFence(). A client that sets up multiple fence triggers can trigger a use-after-free function pointer call. An attacker would connect to the X server to se…
CVE-2026-50256High· 7.8A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland
A stack-based buffer overflow flaw was found in the X.Org X server and Xwayland. A mismatch between the X server and the libXfont2 library's maximum font name length can cause a stack buffer overflow during font alias resolution. The ser…
CVE-2023-6478High· 7.6A flaw was found in xorg-server
A flaw was found in xorg-server. A specially crafted request to RRChangeProviderProperty or RRChangeOutputProperty can trigger an integer overflow which may lead to a disclosure of sensitive information.
CVE-2023-6377High· 7.8A flaw was found in xorg-server
A flaw was found in xorg-server. Querying or changing XKB button actions such as moving from a touchpad to a mouse can result in out-of-bounds memory reads and writes. This may allow local privilege escalation or possible remote code exe…
CVE-2023-5574High· 7.0A use-after-free flaw was found in xorg-x11-server-Xvfb
A use-after-free flaw was found in xorg-x11-server-Xvfb. This issue occurs in Xvfb with a very specific and legacy configuration (a multi-screen setup with multiple protocol screens, also known as Zaphod mode). If the pointer is warped f…