DEBIAN-CVE-2020-15564
- Source
- https://security-tracker.debian.org/tracker/CVE-2020-15564
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2020-15564.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2020-15564
- Upstream
- Published
- 2020-07-07T13:15:10Z
- Modified
- 2025-09-19T06:06:20Z
- Summary
- [none]
- Details
-
An issue was discovered in Xen through 4.13.x, allowing Arm guest OS users to cause a hypervisor crash because of a missing alignment check in VCPUOPregistervcpuinfo. The hypercall VCPUOPregistervcpuinfo is used by a guest to register a shared region with the hypervisor. The region will be mapped into Xen address space so it can be directly accessed. On Arm, the region is accessed with instructions that require a specific alignment. Unfortunately, there is no check that the address provided by the guest will be correctly aligned. As a result, a malicious guest could cause a hypervisor crash by passing a misaligned address. A malicious guest administrator may cause a hypervisor crash, resulting in a Denial of Service (DoS). All Xen versions are vulnerable. Only Arm systems are vulnerable. x86 systems are not affected.
- References
Affected packages
Debian:11 / xen
Package
- Name
- xen
- Purl
- pkg:deb/debian/xen?arch=source
Debian:12 / xen
Package
- Name
- xen
- Purl
- pkg:deb/debian/xen?arch=source
Debian:13 / xen
Package
- Name
- xen
- Purl
- pkg:deb/debian/xen?arch=source
Debian:14 / xen
Package
- Name
- xen
- Purl
- pkg:deb/debian/xen?arch=source