CVE-2025-26595

Summary

CVE-2025-26595 is a buffer overflow vulnerability affecting X.Org and Xwayland. The issue lies in the XkbVModMaskText() function, which allocates a fixed-sized buffer on the stack for virtual modifier names without proper bounds checking. Consequently, the function copies the data into the buffer regardless of its size, potentially leading to a buffer overflow and allowing an attacker to execute arbitrary code. This vulnerability poses a significant risk to systems using these display servers and requires immediate patching.

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