Home/CVE/An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and tha
CVE

CVE-2020-29570

An issue was discovered in Xen through 4.14.x. Recording of the per-vCPU control block mapping maintained by Xen and tha

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.

MEDIUM · CVSS 6.2 EPSS 0.0006
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-770Allocation of Resources Without Limits or Throttling
▤

Affected Products & Versions

3
xen>= 4.4.0 and <= 4.14.0
debian linuxall versions
fedoraproject fedoraall versions
▣

Scoring & Timeline

6.2
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Dec 2020 · 05:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

11
suse-csafopenSUSE-SU-2024:11520-1
suse-csafSUSE-SU-2020:3945-1
suse-csafopenSUSE-SU-2020:2331-1
suse-csafopenSUSE-SU-2020:2313-1
suse-csafSUSE-SU-2020:3913-1
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.openwall.com/lists/oss-security/2020/12/16/4Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/2C6M6S3CIMEBACH6O7V4H2VDANMO6TVA/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OBLV6L6Q24PPQ2CRFXDX4Q76KU776GKI/
https://security.gentoo.org/glsa/202107-30Third Party Advisory
https://www.debian.org/security/2020/dsa-4812Third Party Advisory
https://xenbits.xenproject.org/xsa/advisory-358.htmlPatchVendor Advisory
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