ALT-PU-2025-3655-4 — xorg-xwayland

BDU:2025-03976

HIGH7.8

Уязвимость реализации протокола Wayland для X.Org XWayland, реализации сервера X Window System X.Org Server, связанная с записью за границами буфера, позволяющая нарушителю получить доступ к конфиденциальным данным, нарушить их целостность, а также вызвать отказ в обслуживании

Published: 2025-04-09Modified: 2026-03-04

CVSS 3.xHIGH 7.8

CVSS:3.x/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0MEDIUM 6.8

CVSS:2.0/AV:L/AC:L/Au:S/C:C/I:C/A:C

References

CVE-2025-26598

BDU:2025-04127

HIGH7.8

Уязвимость реализации протокола Wayland для X.Org XWayland, реализации сервера X Window System X.Org Server, связанная с переполнением буфера на стеке, позволяющая нарушителю получить доступ к конфиденциальным данным, нарушить их целостность, а также вызвать отказ в обслуживании

Published: 2025-04-10Modified: 2026-03-04

CVSS 3.xHIGH 7.8

CVSS:3.x/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0MEDIUM 6.8

CVSS:2.0/AV:L/AC:L/Au:S/C:C/I:C/A:C

References

CVE-2025-26595

BDU:2025-04530

HIGH7.8

Уязвимость функции compRedirectWindow() реализации протокола Wayland для X.Org XWayland, реализации сервера X Window System X.Org Server, позволяющая нарушителю выполнить произвольный код

Published: 2025-04-14Modified: 2026-03-04

CVSS 3.xHIGH 7.8

CVSS:3.x/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0MEDIUM 6.8

CVSS:2.0/AV:L/AC:L/Au:S/C:C/I:C/A:C

References

CVE-2025-26599

BDU:2025-04531

HIGH7.8

Уязвимость функции PlayReleasedEvents() реализации протокола Wayland для X.Org XWayland, реализации сервера X Window System X.Org Server, позволяющая нарушителю выполнить произвольный код

Published: 2025-04-14Modified: 2026-03-04

CVSS 3.xHIGH 7.8

CVSS:3.x/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0MEDIUM 6.8

CVSS:2.0/AV:L/AC:L/Au:S/C:C/I:C/A:C

References

CVE-2025-26600

BDU:2025-04569

HIGH7.8

Уязвимость функции SyncInitTrigger() реализации протокола Wayland для X.Org XWayland, реализации сервера X Window System X.Org Server, связанная с использованием памяти после её освобождения, позволяющая нарушителю выполнить произвольный код

Published: 2025-04-15Modified: 2026-03-04

CVSS 3.xHIGH 7.8

CVSS:3.x/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0MEDIUM 6.8

CVSS:2.0/AV:L/AC:L/Au:S/C:C/I:C/A:C

References

CVE-2025-26601

BDU:2025-06970

HIGH7.8

Уязвимость функции XkbSizeKeySyms() реализации протокола Wayland для X.Org XWayland, реализации сервера X Window System X.Org Server, позволяющая нарушителю вызвать отказ в обслуживании или выполнить произвольный код

Published: 2025-06-19Modified: 2026-03-04

CVSS 3.xHIGH 7.8

CVSS:3.x/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0MEDIUM 6.8

CVSS:2.0/AV:L/AC:L/Au:S/C:C/I:C/A:C

References

CVE-2025-26596

BDU:2025-06974

HIGH7.8

Уязвимость функции XkbChangeTypesOfKey() реализации протокола Wayland для X.Org XWayland, реализации сервера X Window System X.Org Server, позволяющая нарушителю вызвать отказ в обслуживании или выполнить произвольный код

Published: 2025-06-19Modified: 2026-03-04

CVSS 3.xHIGH 7.8

CVSS:3.x/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0MEDIUM 6.8

CVSS:2.0/AV:L/AC:L/Au:S/C:C/I:C/A:C

References

CVE-2025-26597

CVE-2025-26595

HIGH7.8

A buffer overflow flaw was found in X.Org and Xwayland. The code in XkbVModMaskText() allocates a fixed-sized buffer on the stack and copies the names of the virtual modifiers to that buffer. The code fails to check the bounds of the buffer and would copy the data regardless of the size.

Published: 2025-02-25Modified: 2026-04-06

CVSS 3.xHIGH 7.8

CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

CVE-2025-26596

HIGH7.8

A heap overflow flaw was found in X.Org and Xwayland. The computation of the length in XkbSizeKeySyms() differs from what is written in XkbWriteKeySyms(), which may lead to a heap-based buffer overflow.

Published: 2025-02-25Modified: 2026-04-06

CVSS 3.xHIGH 7.8

CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

CVE-2025-26597

HIGH7.8

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.

Published: 2025-02-25Modified: 2026-04-06

CVSS 3.xHIGH 7.8

CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

CVE-2025-26598

HIGH7.8

An out-of-bounds write flaw was found in X.Org and Xwayland. The function GetBarrierDevice() searches for the pointer device based on its device ID and returns the matching value, or supposedly NULL, if no match was found. However, the code will return the last element of the list if no matching device ID is found, which can lead to out-of-bounds memory access.

Published: 2025-02-25Modified: 2026-04-06

CVSS 3.xHIGH 7.8

CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

CVE-2025-26599

HIGH7.8

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.

Published: 2025-02-25Modified: 2026-04-06

CVSS 3.xHIGH 7.8

CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

CVE-2025-26600

HIGH7.8

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.

Published: 2025-02-25Modified: 2026-04-06

CVSS 3.xHIGH 7.8

CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

CVE-2025-26601

HIGH7.8

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.

Published: 2025-02-25Modified: 2026-04-06

CVSS 3.xHIGH 7.8

CVSS:3.x/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Package update xorg-xwayland in branch c10f2

Closed issues (14)

Уязвимость функции compRedirectWindow() реализации протокола Wayland для X.Org XWayland, реализации сервера X Window System X.Org Server, позволяющая нарушителю выполнить произвольный код

Уязвимость функции PlayReleasedEvents() реализации протокола Wayland для X.Org XWayland, реализации сервера X Window System X.Org Server, позволяющая нарушителю выполнить произвольный код

A buffer overflow flaw was found in X.Org and Xwayland. The code in XkbVModMaskText() allocates a fixed-sized buffer on the stack and copies the names of the virtual modifiers to that buffer. The code fails to check the bounds of the buffer and would copy the data regardless of the size.

A heap overflow flaw was found in X.Org and Xwayland. The computation of the length in XkbSizeKeySyms() differs from what is written in XkbWriteKeySyms(), which may lead to a heap-based buffer overflow.

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.