An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. Malicious or buggy guest kernels can mount a Denial of Service (DoS) attack affecting the entire system.
Advisories
Source ID Title
Debian DSA Debian DSA DSA-4812-1 xen security update
EUVD EUVD EUVD-2020-21932 An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and that of pointers into the control block is reversed. The consumer assumes, seeing the former initialized, that the latter are also ready for use. Malicious or buggy guest kernels can mount a Denial of Service (DoS) attack affecting the entire system.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2024-08-04T16:55:10.399Z

Reserved: 2020-12-04T00:00:00

Link: CVE-2020-29570

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2020-12-15T17:15:14.753

Modified: 2024-11-21T05:24:13.620

Link: CVE-2020-29570

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.