CVE-2025-26595
7.8
HIGH
CVSS 3.1
EPSS 0.03%
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.
How to fix CVE-2025-26595
To remediate CVE-2025-26595, upgrade the affected package to a fixed version below.
- Debian/xorg-server—upgrade to 2:1.20.11-1+deb11u15 or later
- —no fix listed
Is CVE-2025-26595 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0, < 2:1.20.11-1+deb11u15
- from 0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |