CVE-2015-8550 · cross-distro fix matrix

CVE-2015-8550: Xen, when used on a system providing PV backends, allows local guest OS administrators to cause a denial of service (host OS crash) or gain privileges by writing to memory shared between the frontend and backend, aka a double fetch vulnerability.

Affects 3 Linux releases across 9 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2015-8550 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

linux→ fixed in4.3.3-3urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y linux
```
qemu→ fixed in1:2.5+dfsg-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y qemu
```
xen→ fixed in4.8.0~rc3-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y xen
```

Debian bookworm

Source: Debian Security Tracker

linux→ fixed in4.3.3-3urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y linux
```
qemu→ fixed in1:2.5+dfsg-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y qemu
```
xen→ fixed in4.8.0~rc3-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y xen
```

Debian trixie

Source: Debian Security Tracker

linux→ fixed in4.3.3-3urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y linux
```
qemu→ fixed in1:2.5+dfsg-2urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y qemu
```
xen→ fixed in4.8.0~rc3-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y xen
```

Are YOU affected by CVE-2015-8550?

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

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