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CVE-2020-29040

An issue was discovered in Xen through 4.14.x allowing x86 HVM guest OS users to cause a denial...

8.8 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.38%Down 0.7 points since Apr 14, 2021
90%50%10%1%

What each source reports

NVD Score used 8.8

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.

Record
CVE-2020-29040
CVSS 3.1
8.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS 2.0
4.6 MediumAV:L/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-193, CWE-787
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2020-29040
Updated
2026-11-02
EUVDEUVD-2020-21422 No score

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.

Record
EUVD-2020-21422
Updated
2026-11-03
GitHub AdvisoriesGHSA-w3xr-26m4-xc8m 8.8

An issue was discovered in Xen through 4.14.x allowing x86 HVM guest OS users to cause a denial...

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.

Record
GHSA-w3xr-26m4-xc8m
CVSS 3.1
8.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness
CWE-193, CWE-787
Updated
2026-11-02
OSVALPINE-CVE-2020-29040 8.8

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.

Record
ALPINE-CVE-2020-29040
CVSS 3.1
8.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSV 8.8

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.

Record
CVE-2020-29040
CVSS 3.1
8.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2020-29040 8.8

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.

Record
DEBIAN-CVE-2020-29040
CVSS 3.1
8.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2020-29040 8.8

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.

Record
UBUNTU-CVE-2020-29040
CVSS 3.1
8.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2024:11520-1 No score

xen-4.15.1_01-1.2 on GA media

These are all security issues fixed in the xen-4.15.1_01-1.2 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:11520-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
xen
Alpine:v3.10
 before 4.12.4-r0
4.12.4-r0
xen
Alpine:v3.11
 before 4.13.2-r2
4.13.2-r2
xen
Alpine:v3.12
 before 4.13.2-r2
4.13.2-r2
xen
Alpine:v3.13
 before 4.14.0-r3
4.14.0-r3
xen
Alpine:v3.14
 before 4.14.0-r3
4.14.0-r3
xen
Alpine:v3.15
 before 4.14.0-r3
4.14.0-r3
xen
Alpine:v3.16
 before 4.14.0-r3
4.14.0-r3
xen
Alpine:v3.17
 before 4.14.0-r3
4.14.0-r3
xen
Alpine:v3.18
 before 4.14.0-r3
4.14.0-r3
xen
Alpine:v3.19
 before 4.14.0-r3
4.14.0-r3
Show 12 moreShow less
Affected packages
PackageAffectedFixed
xen
Alpine:v3.20
 before 4.14.0-r3
4.14.0-r3
xen
Alpine:v3.21
 before 4.14.0-r3
4.14.0-r3
xen
Alpine:v3.22
 before 4.14.0-r3
4.14.0-r3
xen
Alpine:v3.23
 before 4.14.0-r3
4.14.0-r3
xen
Alpine:v3.24
 before 4.14.0-r3
4.14.0-r3
xen
Debian:12
 before 4.14.0+88-g1d1d1f5391-1
4.14.0+88-g1d1d1f5391-1
xen
Debian:13
 before 4.14.0+88-g1d1d1f5391-1
4.14.0+88-g1d1d1f5391-1
xen
Debian:14
 before 4.14.0+88-g1d1d1f5391-1
4.14.0+88-g1d1d1f5391-1
xen
Ubuntu:16.04:LTS
 All versions, plus listed versions
4.5.1-0ubuntu14.5.1-0ubuntu24.6.0-1ubuntu14.6.0-1ubuntu24.6.0-1ubuntu4
Show 7 moreShow less
4.6.0-1ubuntu4.14.6.0-1ubuntu4.24.6.0-1ubuntu4.34.6.5-0ubuntu14.6.5-0ubuntu1.14.6.5-0ubuntu1.24.6.5-0ubuntu1.4
 None known
xen
Ubuntu:18.04:LTS
 All versions, plus listed versions
4.9.0-0ubuntu34.9.0-0ubuntu44.9.2-0ubuntu1
 None known
xen
Ubuntu:20.04:LTS
 All versions, plus listed versions
4.9.2-0ubuntu24.9.2-0ubuntu64.9.2-0ubuntu74.11.3+24-g14b62ab3e5-1ubuntu14.11.3+24-g14b62ab3e5-1ubuntu24.11.3+24-g14b62ab3e5-1ubuntu2.24.11.3+24-g14b62ab3e5-1ubuntu2.3
 None known
xen
openSUSE:Tumbleweed
From an advisory covering 93 CVEs
 before 4.15.1_01-1.2
4.15.1_01-1.2

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-29040 is a high vulnerability (CVSS 8.8) in Xen, published November 24, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.38%, the 32nd percentile. Fixed in xen 4.12.4-r0.

References

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