CVE-2026-93517 in Xorgg and Xorg Products
Published on October 28, 2026
X.Org Server GLX RenderLarge Heap Buffer Overflow
A heap buffer overflow in handling GLX
RenderLarge request where dataBytes exceeds cmdlen in X.org X server before 21.1.25 and XWayland before 24.1.14 that could be be triggered by an authenticated X client could cause crashes or code execution in X server context.
Vulnerability Analysis
CVE-2026-93517 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 have no impact on confidentiality and integrity and availability.
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-2026-93517
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Affected Versions
x.orgg xorg-x11-server:- Before 21.1.25 is affected.
- Before 24.1.14 is affected.