CVE-2025-26599 · cross-distro fix matrix

CVE-2025-26599: An access to an uninitialized pointer flaw was found in X.Org and Xwayland. The function compCheckRedirect() may fail if it cannot allocate the backing pixmap. In that case, compRedirectWindow() will return a BadAlloc error without validating the window tree marked just before, which leaves the vali

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

Fix per ecosystem

Each block below is a distro release where CVE-2025-26599 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-2025-26599?

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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