CVE-2020-29566 · cross-distro fix matrix

CVE-2020-29566: An issue was discovered in Xen through 4.14.x. When they require assistance from the device model, x86 HVM guests must be temporarily de-scheduled. The device model will signal Xen when it has completed its operation, via an event channel, so that the relevant vCPU is rescheduled. If the device mode

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

Fix per ecosystem

Each block below is a distro release where CVE-2020-29566 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

xen→ fixed in4.14.0+88-g1d1d1f5391-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y xen
```

Debian bookworm

Source: Debian Security Tracker

xen→ fixed in4.14.0+88-g1d1d1f5391-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y xen
```

Debian trixie

Source: Debian Security Tracker

xen→ fixed in4.14.0+88-g1d1d1f5391-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y xen
```

Are YOU affected by CVE-2020-29566?

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.

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