| CVE ID | CVE-2026-33999 |
| CVSS SCORE | 7.8, AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| AFFECTED VENDORS |
X.Org |
| AFFECTED PRODUCTS |
Server |
| VULNERABILITY DETAILS |
This vulnerability allows local attackers to escalate privileges on affected installations of X.Org Server. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of XkbSetCompatMap requests. The issue results from the lack of proper validation of user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of root. |
| ADDITIONAL DETAILS |
X.Org has issued an update to correct this vulnerability. More details can be found at:
https://gitlab.freedesktop.org/xorg/xserver/-/commit/b024ae17 |
| DISCLOSURE TIMELINE |
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| CREDIT | Jan-Niklas Sohn |
