CVE-2020-29040

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-11-24 · updated 2026-06-17
Weakness: CWE-193

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.

Affected products

xen: through 4.14.0

References

http://www.openwall.com/lists/oss-security/2021/01/19/4
http://xenbits.xen.org/xsa/advisory-355.html
https://xenbits.xen.org/xsa/advisory-355.html
http://www.openwall.com/lists/oss-security/2021/01/19/4
http://xenbits.xen.org/xsa/advisory-355.html
https://xenbits.xen.org/xsa/advisory-355.html

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