Description
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.
Details
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| xorg-server | — | — |
| xorg-server-hwe-16.04 | — | — |
| xorg-server-hwe-18.04 | — | — |
| xwayland | — | — |
References
Similar Threats
- Unknown BELL-CVE-2025-26594
- Unknown BELL-CVE-2025-26595
- Unknown BELL-CVE-2025-26596
- Unknown BELL-CVE-2025-26597
- Unknown BELL-CVE-2024-9632
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