CVE-2026-109093: Stack Overflow

Description

A stack buffer overflow in ProcXTestFakeInput DeviceValuator handling in X.Org xwayland before 24.1.15 and X server before 21.1.26 could be used by authenticated clients to crash or execute code in the X server.

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Weakness Type (CWE)

CWE-121 CWE-121

References

Other References

https://gitlab.freedesktop.org/xorg/xserver/-/commit/99ce069ae814b39048543062e073320f14723ee0

Frequently Asked Questions

What is CVE-2026-109093? +

A stack buffer overflow in ProcXTestFakeInput DeviceValuator handling in X.Org xwayland before 24.1.15 and X server before 21.1.26 could be used by authenticated clients to crash or execute code in the X server.

How do I check if I'm vulnerable to CVE-2026-109093? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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