CVE-2026-109904

CVSS 6.9 (medium) · published 2026-11-13

A buffer overread caused by an integer-overflow in Proc/SProcXResQueryClientIds in X.Org xwayland before 24.1.15 and X Server before 21.1.26 could be used by attackers on authenticated X clients to crash the server or leak out information.

Weakness: CWE-126

Source: NVD CVE-2026-109904

References

• https://gitlab.freedesktop.org/xorg/xserver/-/commit/a3899d75e180d73f2971af2a402e6fdf19c0339c
• https://gitlab.freedesktop.org/xorg/xserver/-/commit/ff754b812597177412f2e2fa2b1dd1eecbeb75cf

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