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.
References
History
No history.
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
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
Redhat Information
No data.
CWE