CVE-2020-29040

HIGH

Xen < 4.14.0 - Off-by-one Error in x86 HVM Guest Handling

Title source: llm
STIX 2.1

Description

An issue was discovered in Xen through 4.14.x allowing x86 HVM guest OS users to cause a denial of service (stack corruption), cause a data leak, or possibly gain privileges because of an off-by-one error. NOTE: this issue is caused by an incorrect fix for CVE-2020-27671.

References (3)

Core 3
Core References
Vendor Advisory x_refsource_confirm
http://xenbits.xen.org/xsa/advisory-355.html
Vendor Advisory x_refsource_misc
https://xenbits.xen.org/xsa/advisory-355.html
Mailing List, Third Party Advisory mailing-list x_refsource_mlist
http://www.openwall.com/lists/oss-security/2021/01/19/4

Scores

CVSS v3 8.8
EPSS 0.0037
EPSS Percentile 28.8%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Details

CWE
CWE-193 CWE-787
Status published
Products (1)
xen/xen < 4.14.0
Published Nov 24, 2020
Tracked Since Feb 18, 2026