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.
Published 2020-12-15 17:15:15
Updated 2021-12-10 02:04:06
Source MITRE
View at NVD,   CVE.org
Vulnerability category: Denial of service

Exploit prediction scoring system (EPSS) score for CVE-2020-29570

Probability of exploitation activity in the next 30 days: 0.14%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 49 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2020-29570

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
4.9
MEDIUM AV:L/AC:L/Au:N/C:N/I:N/A:C
3.9
6.9
NIST
6.2
MEDIUM CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
2.5
3.6
NIST

CWE ids for CVE-2020-29570

  • The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.
    Assigned by: nvd@nist.gov (Primary)

References for CVE-2020-29570

Products affected by CVE-2020-29570

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