Xen Hypervisor: flaws allow malicious VM to read and write other VMs' memory

Xen

Two flaws in Xen Hypervisor allow a malicious guest VM to read and write the memory of other VMs

Do this now

Check the Xen project's security advisory for a fixed release and restrict guest VM access to hosts meanwhile.

First seen: 4 Nov 2026
Last update: 4 Nov 2026, 12:17 UTC
Source: news
On the menu as: Linux server software

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Xen Hypervisor: flaws allow malicious VM to read and write other VMs' memory
Severity: unknown. Patch status: fix status unknown.
Affected: Xen

Two flaws in Xen Hypervisor allow a malicious guest VM to read and write the memory of other VMs

## Steps
1. Search the repo, its CI and infra config for Xen. If present, report the version in use and whether it's affected.
2. No source names a fix yet; check the vendor advisory. Until one ships: restrict network access to it.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://thehackernews.com/2026/11/xen-hypervisor-flaws-let-one-malicious.html
https://pwned.coffee/i/xen-hypervisor-flaws-allow-malicious-vm-to-read-and-write-other-vms-memo

Receipt

Exploitation: No known exploitation
Score: No CVSS published yet: severity unknown.
Last checked: 4 Nov 2026, 13:17 UTC

Sources: KEV – CVE record – Vendor –

Sources

feeds.feedburner.com: Xen Hypervisor Flaws Let One Malicious VM Read and Write Any Other VM's Memory

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