Filtered by vendor X.org
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Total
155 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| CVE-2026-50259 | 2 Redhat, X.org | 3 Enterprise Linux, X Server, Xwayland | 2026-06-08 | N/A | 7.8 HIGH |
| 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 a client-controlled offset, allowing a stack buffer overflow. This may be used to crash the server, or for privilege escalation if the X server runs as root. | |||||
| CVE-2026-50258 | 2 Redhat, X.org | 3 Enterprise Linux, X Server, Xwayland | 2026-06-08 | N/A | 7.8 HIGH |
| 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 XkbMaxShiftLevel. A client can change key types to excessive shift levels and trigger stack overflows. This is caused by an incomplete fix of CVE-2025-26597. This may be used to crash the server, or for privilege escalation if the X server runs as root. | |||||
| CVE-2026-50257 | 2 Redhat, X.org | 3 Enterprise Linux, X Server, Xwayland | 2026-06-08 | N/A | 7.8 HIGH |
| 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 set up a fence and await that fence, then a second X connection destroys the fence, causing the use-after-free. This may be used to crash the server, or for privilege escalation if the X server runs as root. | |||||
| CVE-2026-50256 | 2 Redhat, X.org | 3 Enterprise Linux, X Server, Xwayland | 2026-06-08 | N/A | 7.8 HIGH |
| 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 server allocates a 256 byte stack buffer but libXfont2's alias target name length is 1024 bytes. A font alias name between 257 and 1023 bytes causes the X server to copy that name into the undersized stack buffer without further checks. This may be used to crash the server, or for privilege escalation if the X server runs as root. | |||||
| CVE-2026-34002 | 2 Redhat, X.org | 2 Enterprise Linux, X Server | 2026-06-08 | N/A | 6.1 MEDIUM |
| A flaw was found in the X.Org X server. This vulnerability, an out-of-bounds read, affects the XKB (X Keyboard Extension) modifier map handling. An attacker with access to the X11 server can exploit this by sending a malformed request, which causes the server to read beyond its intended memory boundaries. This can lead to the exposure of sensitive information or cause the server to crash, resulting in a denial of service. | |||||
| CVE-2026-34000 | 2 Redhat, X.org | 2 Enterprise Linux, X Server | 2026-06-08 | N/A | 6.1 MEDIUM |
| A flaw was found in the X.Org X server. This out-of-bounds read vulnerability in the XKB geometry processing, specifically within the `CheckSetGeom()` and `XkbAddGeomKeyAlias` functions, allows an attacker to read uninitialized or out-of-bounds memory. An attacker with a connection to the X11 server, either locally or remotely, can exploit this without user interaction. This could lead to the disclosure of memory contents or cause a denial of service by crashing the server. | |||||
| CVE-2025-26597 | 3 Redhat, Tigervnc, X.org | 4 Enterprise Linux, Tigervnc, X Server and 1 more | 2026-06-02 | N/A | 7.8 HIGH |
| A buffer overflow flaw was found in X.Org and Xwayland. If XkbChangeTypesOfKey() is called with a 0 group, it will resize the key symbols table to 0 but leave the key actions unchanged. If the same function is later called with a non-zero value of groups, this will cause a buffer overflow because the key actions are of the wrong size. | |||||
| CVE-2017-13720 | 1 X.org | 1 Libxfont | 2026-05-13 | 3.6 LOW | 7.1 HIGH |
| In the PatternMatch function in fontfile/fontdir.c in libXfont through 1.5.2 and 2.x before 2.0.2, an attacker with access to an X connection can cause a buffer over-read during pattern matching of fonts, leading to information disclosure or a crash (denial of service). This occurs because '\0' characters are incorrectly skipped in situations involving ? characters. | |||||
| CVE-2017-13723 | 2 Debian, X.org | 2 Debian Linux, X Server | 2026-05-13 | 4.6 MEDIUM | 7.8 HIGH |
| In X.Org Server (aka xserver and xorg-server) before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large or malformed XKB related atoms and accessing them via xkbcomp. | |||||
| CVE-2017-13721 | 2 Debian, X.org | 2 Debian Linux, X Server | 2026-05-13 | 1.9 LOW | 4.7 MEDIUM |
| In X.Org Server (aka xserver and xorg-server) before 1.19.4, an attacker authenticated to an X server with the X shared memory extension enabled can cause aborts of the X server or replace shared memory segments of other X clients in the same session. | |||||
| CVE-2017-13722 | 1 X.org | 1 Libxfont | 2026-05-13 | 3.6 LOW | 7.1 HIGH |
| In the pcfGetProperties function in bitmap/pcfread.c in libXfont through 1.5.2 and 2.x before 2.0.2, a missing boundary check (for PCF files) could be used by local attackers authenticated to an Xserver for a buffer over-read, for information disclosure or a crash of the X server. | |||||
| CVE-2017-10972 | 1 X.org | 1 X Server | 2026-05-13 | 4.0 MEDIUM | 6.5 MEDIUM |
| Uninitialized data in endianness conversion in the XEvent handling of the X.Org X Server before 2017-06-19 allowed authenticated malicious users to access potentially privileged data from the X server. | |||||
| CVE-2017-10971 | 1 X.org | 1 X Server | 2026-05-13 | 6.5 MEDIUM | 8.8 HIGH |
| In the X.Org X server before 2017-06-19, a user authenticated to an X Session could crash or execute code in the context of the X Server by exploiting a stack overflow in the endianness conversion of X Events. | |||||
| CVE-2014-8091 | 1 X.org | 2 X11, X Server | 2026-05-06 | 4.3 MEDIUM | N/A |
| X.Org X Window System (aka X11 and X) X11R5 and X.Org Server (aka xserver and xorg-server) before 1.16.3, when using SUN-DES-1 (Secure RPC) authentication credentials, does not check the return value of a malloc call, which allows remote attackers to cause a denial of service (NULL pointer dereference and server crash) via a crafted connection request. | |||||
| CVE-2014-8094 | 3 Debian, Oracle, X.org | 3 Debian Linux, Solaris, X Server | 2026-05-06 | 6.5 MEDIUM | N/A |
| Integer overflow in the ProcDRI2GetBuffers function in the DRI2 extension in X.Org Server (aka xserver and xorg-server) 1.7.0 through 1.16.x before 1.16.3 allows remote authenticated users to cause a denial of service (crash) or possibly execute arbitrary code via a crafted request, which triggers an out-of-bounds read or write. | |||||
| CVE-2016-7948 | 2 Fedoraproject, X.org | 2 Fedora, Libxrandr | 2026-05-06 | 7.5 HIGH | 9.8 CRITICAL |
| X.org libXrandr before 1.5.1 allows remote X servers to trigger out-of-bounds write operations by leveraging mishandling of reply data. | |||||
| CVE-2014-8095 | 2 Debian, X.org | 3 Debian Linux, X11, X Server | 2026-05-06 | 6.5 MEDIUM | N/A |
| The XInput extension in X.Org X Window System (aka X11 or X) X11R4 and X.Org Server (aka xserver and xorg-server) before 1.16.3 allows remote authenticated users to cause a denial of service (out-of-bounds read or write) or possibly execute arbitrary code via a crafted length or index value to the (1) SProcXChangeDeviceControl, (2) ProcXChangeDeviceControl, (3) ProcXChangeFeedbackControl, (4) ProcXSendExtensionEvent, (5) SProcXIAllowEvents, (6) SProcXIChangeCursor, (7) ProcXIChangeHierarchy, (8) SProcXIGetClientPointer, (9) SProcXIGrabDevice, (10) SProcXIUngrabDevice, (11) ProcXIUngrabDevice, (12) SProcXIPassiveGrabDevice, (13) ProcXIPassiveGrabDevice, (14) SProcXIPassiveUngrabDevice, (15) ProcXIPassiveUngrabDevice, (16) SProcXListDeviceProperties, (17) SProcXDeleteDeviceProperty, (18) SProcXIListProperties, (19) SProcXIDeleteProperty, (20) SProcXIGetProperty, (21) SProcXIQueryDevice, (22) SProcXIQueryPointer, (23) SProcXISelectEvents, (24) SProcXISetClientPointer, (25) SProcXISetFocus, (26) SProcXIGetFocus, or (27) SProcXIWarpPointer function. | |||||
| CVE-2013-7439 | 3 Canonical, Debian, X.org | 4 Ubuntu Linux, Debian Linux, Libx11 and 1 more | 2026-05-06 | 7.5 HIGH | N/A |
| Multiple off-by-one errors in the (1) MakeBigReq and (2) SetReqLen macros in include/X11/Xlibint.h in X11R6.x and libX11 before 1.6.0 allow remote attackers to have unspecified impact via a crafted request, which triggers a buffer overflow. | |||||
| CVE-2016-7953 | 2 Fedoraproject, X.org | 2 Fedora, Libxvmc | 2026-05-06 | 7.5 HIGH | 9.8 CRITICAL |
| Buffer underflow in X.org libXvMC before 1.0.10 allows remote X servers to have unspecified impact via an empty string. | |||||
| CVE-2016-7952 | 2 Fedoraproject, X.org | 2 Fedora, Libxtst | 2026-05-06 | 5.0 MEDIUM | 7.5 HIGH |
| X.org libXtst before 1.2.3 allows remote X servers to cause a denial of service (infinite loop) via a reply in the (1) XRecordStartOfData, (2) XRecordEndOfData, or (3) XRecordClientDied category without a client sequence and with attached data. | |||||