CVE-2026-93521 vulnerability in Xorg Products
Published on October 28, 2026
X.Org Server RandR ChangeProviderProperty Heap Buffer Overflow
A buffer overflow in RandR
ChangeProviderProperty requests in X.Org X Server before 2.1.25 and XWayland before 24.4.14 could be used by authenticated X clients to crash or execute code within the X server context.
Vulnerability Analysis
CVE-2026-93521 can be exploited with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
Heap-based Buffer Overflow
A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
Products Associated with CVE-2026-93521
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Affected Versions
x.org xorg-x11-server:- Before 21.1.25 is affected.
- Before 24.1.14 is affected.