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Sicherheitslücken in xorg-server · Seite 2

In den letzten 30 Tagen veröffentlichte Sicherheitslücken für xorg-server: 11. Davon im KEV-Katalog: 0.

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Sicherheitslücken: 151

  1. CVE-2026-50256

    Hoch · CVSS 7.8EPSS 0,16%Korrektur verfügbar

    Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: stack buffer overflow in font alias resolution due to libxfont2 name length mismatch

    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.

    • Auf 2:21.1.23-1 aktualisieren
    Veröffentlicht Aktualisiert
  2. CVE-2026-50257

    Hoch · CVSS 7.8EPSS 0,14%Korrektur verfügbar

    Xorg-x11-server: xorg-x11-server-xwayland: xorg-x11-server: use-after-free 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 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.

    • Auf 2:21.1.23-1 aktualisieren
    Veröffentlicht Aktualisiert
  3. CVE-2026-34002

    Mittel · CVSS 6.1EPSS 0,49%Korrektur verfügbar

    Xorg: xwayland: x.org x server: information disclosure or denial of service via out-of-bounds read in xkb modifier map handling

    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.

    • Auf 2:21.1.22-1 aktualisieren
    Veröffentlicht Aktualisiert
  4. CVE-2026-34000

    Mittel · CVSS 6.1EPSS 0,49%Korrektur verfügbar

    Xwayland: xorg: x.org x server: information disclosure and denial of service via out-of-bounds read in xkb geometry processing.

    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.

    • Auf 2:21.1.22-1 aktualisieren
    Veröffentlicht Aktualisiert
  5. CVE-2026-34003

    Hoch · CVSS 7.8EPSS 0,25%Korrektur verfügbar

    Xorg: xwayland: x.org x server: information exposure and denial of service via out-of-bounds memory access

    A flaw was found in the X.Org X server's XKB key types request validation. A local attacker could send a specially crafted request to the X server, leading to an out-of-bounds memory access vulnerability. This could result in the disclosure of sensitive information or cause the server to crash, leading to a Denial of Service (DoS). In certain configurations, higher impact outcomes may be possible.

    • Auf 2:21.1.22-1 aktualisieren
    Veröffentlicht Aktualisiert
  6. CVE-2026-34001

    Hoch · CVSS 7.8EPSS 0,26%Korrektur verfügbar

    Xorg: xwayland: x.org x server: use-after-free vulnerability leads to server crash and potential memory corruption

    A flaw was found in the X.Org X server. This use-after-free vulnerability occurs in the XSYNC fence triggering logic, specifically within the miSyncTriggerFence() function. An attacker with access to the X11 server can exploit this without user interaction, leading to a server crash and potentially enabling memory corruption. This could result in a denial of service or further compromise of the system.

    • Auf 2:21.1.22-1 aktualisieren
    Veröffentlicht Aktualisiert
  7. CVE-2026-33999

    Hoch · CVSS 7.8EPSS 0,38%Korrektur verfügbar

    Xorg: xwayland: x.org x server: denial of service via integer underflow in xkb compatibility map handling

    A flaw was found in the X.Org X server. This integer underflow vulnerability, specifically in the XKB compatibility map handling, allows an attacker with local or remote X11 server access to trigger a buffer read overrun. This can lead to memory-safety violations and potentially a denial of service (DoS) or other severe impacts.

    • Auf 2:21.1.22-1 aktualisieren
    Veröffentlicht Aktualisiert
  8. CVE-2025-62229

    Hoch · CVSS 7.3EPSS 0,51%Korrektur verfügbar

    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 or a crash, potentially allowing an attacker to execute arbitrary code or cause a denial of service.

    • Auf 2:21.1.20-1 aktualisieren
    Veröffentlicht Aktualisiert
  9. CVE-2025-62230

    Hoch · CVSS 7.3EPSS 0,28%Korrektur verfügbar

    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 memory corruption or a crash when affected clients disconnect.

    • Auf 2:21.1.20-1 aktualisieren
    Veröffentlicht Aktualisiert
  10. CVE-2025-62231

    Hoch · CVSS 7.3EPSS 0,3%Korrektur verfügbar

    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 overflow, leading to memory corruption or a crash.

    • Auf 2:21.1.20-1 aktualisieren
    Veröffentlicht Aktualisiert
  11. CVE-2025-49180

    Hoch · CVSS 7.8EPSS 0,33%Korrektur verfügbar

    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.

    • Auf 2:21.1.16-1.2 aktualisieren
    Veröffentlicht Aktualisiert
  12. CVE-2025-49179

    Hoch · CVSS 7.3EPSS 0,34%Korrektur verfügbar

    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.

    • Auf 2:21.1.16-1.2 aktualisieren
    Veröffentlicht Aktualisiert
  13. CVE-2025-49178

    Mittel · CVSS 5.5EPSS 0,25%Korrektur verfügbar

    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.

    • Auf 2:21.1.16-1.2 aktualisieren
    Veröffentlicht Aktualisiert
  14. CVE-2025-49177

    Mittel · CVSS 6.1EPSS 0,44%Korrektur verfügbar

    Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: data leak in xfixes extension's xfixessetclientdisconnectmode

    A flaw was found in the XFIXES extension. The XFixesSetClientDisconnectMode handler does not validate the request length, allowing a client to read unintended memory from previous requests.

    • Auf 2:21.1.16-1.2 aktualisieren
    Veröffentlicht Aktualisiert
  15. CVE-2025-49176

    Hoch · CVSS 7.3EPSS 0,37%Korrektur verfügbar

    Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: integer overflow in big requests extension

    A flaw was found in the Big Requests extension. The request length is multiplied by 4 before checking against the maximum allowed size, potentially causing an integer overflow and bypassing the size check.

    • Auf 2:21.1.16-1.3 aktualisieren
    Veröffentlicht Aktualisiert
  16. CVE-2025-49175

    Mittel · CVSS 6.1EPSS 0,34%Korrektur verfügbar

    Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: out-of-bounds read in x rendering extension animated cursors

    A flaw was found in the X Rendering extension's handling of animated cursors. If a client provides no cursors, the server assumes at least one is present, leading to an out-of-bounds read and potential crash.

    • Auf 2:21.1.16-1.2 aktualisieren
    Veröffentlicht Aktualisiert
  17. CVE-2022-49737

    Hoch · CVSS 7.7EPSS 0,34%Korrektur verfügbar

    CVE-2022-49737

    In X.Org X server 20.11 through 21.1.16, when a client application uses easystroke for mouse gestures, the main thread modifies various data structures used by the input thread without acquiring a lock, aka a race condition. In particular, AttachDevice in dix/devices.c does not acquire an input lock.

    • Auf 2:21.1.16-1.1 aktualisieren
    Veröffentlicht Aktualisiert
  18. CVE-2025-26601

    Hoch · CVSS 7.8EPSS 0,39%Korrektur verfügbar

    Xorg: xwayland: use-after-free in syncinittrigger()

    A use-after-free flaw was found in X.Org and Xwayland. When changing an alarm, the values of the change mask are evaluated one after the other, changing the trigger values as requested, and eventually, SyncInitTrigger() is called. If one of the changes triggers an error, the function will return early, not adding the new sync object, possibly causing a use-after-free when the alarm eventually triggers.

    • Auf 2:21.1.16-1 aktualisieren
    Veröffentlicht Aktualisiert
  19. CVE-2025-26600

    Hoch · CVSS 7.8EPSS 0,39%Korrektur verfügbar

    Xorg: xwayland: use-after-free in playreleasedevents()

    A use-after-free flaw was found in X.Org and Xwayland. When a device is removed while still frozen, the events queued for that device remain while the device is freed. Replaying the events will cause a use-after-free.

    • Auf 2:21.1.16-1 aktualisieren
    Veröffentlicht Aktualisiert
  20. CVE-2025-26599

    Hoch · CVSS 7.8EPSS 0,4%Korrektur verfügbar

    Xorg: xwayland: use of uninitialized pointer in compredirectwindow()

    An access to an uninitialized pointer flaw was found in X.Org and Xwayland. The function compCheckRedirect() may fail if it cannot allocate the backing pixmap. In that case, compRedirectWindow() will return a BadAlloc error without validating the window tree marked just before, which leaves the validated data partly initialized and the use of an uninitialized pointer later.

    • Auf 2:21.1.16-1 aktualisieren
    Veröffentlicht Aktualisiert

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