CVE-2020-29570
MEDIUMXen 4.4.0-4.13.x - Denial of Service via Per-vCPU Control Block Mapping
Title source: llmDescription
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.
References (6)
Core 6
Core References
Patch, Vendor Advisory x_refsource_misc
https://xenbits.xenproject.org/xsa/advisory-358.html
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2020/dsa-4812
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
http://www.openwall.com/lists/oss-security/2020/12/16/4
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OBLV6L6Q24PPQ2CRFXDX4Q76KU776GKI/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2C6M6S3CIMEBACH6O7V4H2VDANMO6TVA/
Third Party Advisory vendor-advisory
x_refsource_gentoo
https://security.gentoo.org/glsa/202107-30
Scores
CVSS v3
6.2
EPSS
0.0006
EPSS Percentile
18.6%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-770
Status
published
Products (4)
debian/debian_linux
10.0
fedoraproject/fedora
32
fedoraproject/fedora
33
xen/xen
4.4.0 - 4.14.0
Published
Dec 15, 2020
Tracked Since
Feb 18, 2026