CVE-2025-26595 · cross-distro fix matrix

CVE-2025-26595: 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.

Affects 5 Linux releases across 8 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2025-26595 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

xorg-server→ fixed in2:1.20.11-1+deb11u15urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y xorg-server
```

Debian bookworm

Source: Debian Security Tracker

xorg-server→ fixed in2:21.1.7-3+deb12u9urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y xorg-server
```

Debian trixie

Source: Debian Security Tracker

xorg-server→ fixed in2:21.1.16-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y xorg-server
```
xwayland→ fixed in2:24.1.6-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y xwayland
```

Alpine v3.21

Source: Alpine secdb

xorg-server→ fixed in21.1.16-r0

apk update && apk add --upgrade xorg-server

xwayland→ fixed in24.1.6-r0

apk update && apk add --upgrade xwayland

Alpine edge

Source: Alpine secdb

xorg-server→ fixed in21.1.16-r0

apk update && apk add --upgrade xorg-server

xwayland→ fixed in24.1.6-r0

apk update && apk add --upgrade xwayland

Are YOU affected by CVE-2025-26595?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

curl https://mindsparkstack.com/scan.sh | bash

Form-based quickscan View on NVD

Continuous monitoring beats manual checking

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