An issue was discovered in Xen through 4.13.x, allowing guest OS users to cause a denial of service because of a bad error path in GNTTABOP_map_grant. Grant table operations are expected to return 0 for success, and a negative number for errors. Some misplaced brackets cause one error path to return 1 instead of a negative value. The grant table code in Linux treats this condition as success, and proceeds with incorrectly initialised state. A buggy or malicious guest can construct its grant table in such a way that, when a backend domain tries to map a grant, it hits the incorrect error path. This will crash a Linux based dom0 or backend domain.
History

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cve-icon MITRE Information

Status: PUBLISHED

Assigner: mitre

Published: 2020-04-14T12:20:24

Updated: 2020-07-13T15:06:08

Reserved: 2020-04-14T00:00:00


Link: CVE-2020-11743

JSON object: View

cve-icon NVD Information

Status : Modified

Published: 2020-04-14T13:15:12.970

Modified: 2023-11-07T03:15:05.153


Link: CVE-2020-11743

JSON object: View

cve-icon Redhat Information

No data.

CWE