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CVE-2020-29570

nvd nist
Published: Dec 15, 2020Modified: Jun 17, 2026

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6.2
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploitability: 2.5 / Impact: 3.6
Source: NVD

Description

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.

Affected (4)

Xen
1 product
Xen
Debian
1 product
Debian Linux
Fedoraproject
1 product
Fedora
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Xen
From 4.4.0 to 4.14.0
Configuration B
1 vulnerable
Vulnerable SoftwareAffected Versions
Debian Linux
Version 10.0
Configuration C
2 vulnerable
Vulnerable SoftwareAffected Versions
Fedoraproject
Fedora
Version 32
Fedora
Version 33

Related CWEs

CWE-770
Allocation of Resources Without Limits or Throttling
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.

References (12)

Source: cve@mitre.org
Mailing ListThird Party Advisory
Source: cve@mitre.org
Source: cve@mitre.org
Source: cve@mitre.org
Third Party Advisory
Source: cve@mitre.org
Third Party Advisory
Source: cve@mitre.org
PatchVendor Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Source: af854a3a-2127-422b-91ae-364da2661108
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
PatchVendor Advisory

Timeline

No history available yet.