CVE-2025-26595: Xorg: xwayland: buffer overflow in xkbvmodmasktext()
Description
A buffer overflow flaw was found in X.Org and Xwayland. The code in XkbVModMaskText() allocates a fixed-sized buffer on the stack and copies the names of the virtual modifiers to that buffer. The code fails to check the bounds of the buffer and would copy the data regardless of the size.
Classification
CVE ID: CVE-2025-26595
Problem Types
Stack-based Buffer OverflowAffected Products
Vendor: Red Hat, Red Hat, Red Hat, Red Hat, Red Hat, Red Hat, Red Hat, Red Hat, Red Hat, Red Hat
Product: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9
Exploit Prediction Scoring System (EPSS)
EPSS Score: 0.02% (probability of being exploited)
EPSS Percentile: 3.54% (scored less or equal to compared to others)
EPSS Date: 2025-03-26 (when was this score calculated)
References
https://nvd.nist.gov/vuln/detail/CVE-2025-26595https://access.redhat.com/security/cve/CVE-2025-26595
https://bugzilla.redhat.com/show_bug.cgi?id=2345257