CVE-2020-29569

See a problem?
Please try reporting it to the source first.
Source
https://nvd.nist.gov/vuln/detail/CVE-2020-29569
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-29569.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2020-29569
Related
Published
2020-12-15T17:15:14Z
Modified
2024-09-18T03:11:44.266613Z
Severity
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

An issue was discovered in the Linux kernel through 5.10.1, as used with Xen through 4.14.x. The Linux kernel PV block backend expects the kernel thread handler to reset ring->xenblkd to NULL when stopped. However, the handler may not have time to run if the frontend quickly toggles between the states connect and disconnect. As a consequence, the block backend may re-use a pointer after it was freed. A misbehaving guest can trigger a dom0 crash by continuously connecting / disconnecting a block frontend. Privilege escalation and information leaks cannot be ruled out. This only affects systems with a Linux blkback.

References

Affected packages

Alpine:v3.13 / linux-lts

Package

Name
linux-lts
Purl
pkg:apk/alpine/linux-lts?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.4-r0

Affected versions

5.*

5.4.0-r1
5.4.0-r2
5.4.0-r3
5.4.1-r0
5.4.2-r0
5.4.3-r0
5.4.4-r0
5.4.4-r1
5.4.5-r0
5.4.6-r0
5.4.7-r0
5.4.8-r0
5.4.10-r0
5.4.11-r0
5.4.12-r0
5.4.12-r1
5.4.13-r1
5.4.14-r0
5.4.16-r0
5.4.17-r0
5.4.18-r0
5.4.20-r0
5.4.20-r1
5.4.21-r0
5.4.22-r0
5.4.23-r0
5.4.23-r1
5.4.24-r1
5.4.25-r0
5.4.26-r0
5.4.27-r0
5.4.28-r0
5.4.29-r0
5.4.30-r0
5.4.31-r0
5.4.32-r0
5.4.33-r0
5.4.34-r0
5.4.35-r0
5.4.36-r0
5.4.38-r0
5.4.39-r0
5.4.40-r0
5.4.41-r0
5.4.42-r0
5.4.42-r1
5.4.43-r0
5.4.43-r1
5.4.44-r0
5.4.45-r0
5.4.46-r0
5.4.46-r1
5.4.47-r0
5.4.47-r1
5.4.48-r0
5.4.49-r0
5.4.50-r0
5.4.51-r0
5.4.52-r0
5.4.53-r0
5.4.54-r0
5.4.54-r1
5.4.54-r2
5.4.55-r0
5.4.57-r0
5.4.57-r1
5.4.58-r0
5.4.59-r0
5.4.60-r0
5.4.61-r0
5.4.61-r1
5.4.62-r0
5.4.63-r0
5.4.64-r0
5.4.65-r0
5.4.66-r0
5.4.67-r0
5.4.68-r0
5.4.69-r0
5.4.70-r0
5.4.71-r0
5.4.72-r0
5.4.73-r0
5.4.74-r0
5.4.75-r0
5.4.77-r0
5.4.78-r0
5.4.79-r0
5.4.80-r0
5.4.81-r0
5.4.82-r0
5.10.0-r0
5.10.1-r0
5.10.1-r1
5.10.2-r0
5.10.3-r0

Alpine:v3.13 / xen

Package

Name
xen
Purl
pkg:apk/alpine/xen?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0

Alpine:v3.14 / linux-lts

Package

Name
linux-lts
Purl
pkg:apk/alpine/linux-lts?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.4-r0

Affected versions

5.*

5.4.0-r1
5.4.0-r2
5.4.0-r3
5.4.1-r0
5.4.2-r0
5.4.3-r0
5.4.4-r0
5.4.4-r1
5.4.5-r0
5.4.6-r0
5.4.7-r0
5.4.8-r0
5.4.10-r0
5.4.11-r0
5.4.12-r0
5.4.12-r1
5.4.13-r1
5.4.14-r0
5.4.16-r0
5.4.17-r0
5.4.18-r0
5.4.20-r0
5.4.20-r1
5.4.21-r0
5.4.22-r0
5.4.23-r0
5.4.23-r1
5.4.24-r1
5.4.25-r0
5.4.26-r0
5.4.27-r0
5.4.28-r0
5.4.29-r0
5.4.30-r0
5.4.31-r0
5.4.32-r0
5.4.33-r0
5.4.34-r0
5.4.35-r0
5.4.36-r0
5.4.38-r0
5.4.39-r0
5.4.40-r0
5.4.41-r0
5.4.42-r0
5.4.42-r1
5.4.43-r0
5.4.43-r1
5.4.44-r0
5.4.45-r0
5.4.46-r0
5.4.46-r1
5.4.47-r0
5.4.47-r1
5.4.48-r0
5.4.49-r0
5.4.50-r0
5.4.51-r0
5.4.52-r0
5.4.53-r0
5.4.54-r0
5.4.54-r1
5.4.54-r2
5.4.55-r0
5.4.57-r0
5.4.57-r1
5.4.58-r0
5.4.59-r0
5.4.60-r0
5.4.61-r0
5.4.61-r1
5.4.62-r0
5.4.63-r0
5.4.64-r0
5.4.65-r0
5.4.66-r0
5.4.67-r0
5.4.68-r0
5.4.69-r0
5.4.70-r0
5.4.71-r0
5.4.72-r0
5.4.73-r0
5.4.74-r0
5.4.75-r0
5.4.77-r0
5.4.78-r0
5.4.79-r0
5.4.80-r0
5.4.81-r0
5.4.82-r0
5.10.0-r0
5.10.1-r0
5.10.1-r1
5.10.2-r0
5.10.3-r0

Alpine:v3.14 / xen

Package

Name
xen
Purl
pkg:apk/alpine/xen?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0

Alpine:v3.15 / linux-lts

Package

Name
linux-lts
Purl
pkg:apk/alpine/linux-lts?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.4-r0

Affected versions

5.*

5.4.0-r1
5.4.0-r2
5.4.0-r3
5.4.1-r0
5.4.2-r0
5.4.3-r0
5.4.4-r0
5.4.4-r1
5.4.5-r0
5.4.6-r0
5.4.7-r0
5.4.8-r0
5.4.10-r0
5.4.11-r0
5.4.12-r0
5.4.12-r1
5.4.13-r1
5.4.14-r0
5.4.16-r0
5.4.17-r0
5.4.18-r0
5.4.20-r0
5.4.20-r1
5.4.21-r0
5.4.22-r0
5.4.23-r0
5.4.23-r1
5.4.24-r1
5.4.25-r0
5.4.26-r0
5.4.27-r0
5.4.28-r0
5.4.29-r0
5.4.30-r0
5.4.31-r0
5.4.32-r0
5.4.33-r0
5.4.34-r0
5.4.35-r0
5.4.36-r0
5.4.38-r0
5.4.39-r0
5.4.40-r0
5.4.41-r0
5.4.42-r0
5.4.42-r1
5.4.43-r0
5.4.43-r1
5.4.44-r0
5.4.45-r0
5.4.46-r0
5.4.46-r1
5.4.47-r0
5.4.47-r1
5.4.48-r0
5.4.49-r0
5.4.50-r0
5.4.51-r0
5.4.52-r0
5.4.53-r0
5.4.54-r0
5.4.54-r1
5.4.54-r2
5.4.55-r0
5.4.57-r0
5.4.57-r1
5.4.58-r0
5.4.59-r0
5.4.60-r0
5.4.61-r0
5.4.61-r1
5.4.62-r0
5.4.63-r0
5.4.64-r0
5.4.65-r0
5.4.66-r0
5.4.67-r0
5.4.68-r0
5.4.69-r0
5.4.70-r0
5.4.71-r0
5.4.72-r0
5.4.73-r0
5.4.74-r0
5.4.75-r0
5.4.77-r0
5.4.78-r0
5.4.79-r0
5.4.80-r0
5.4.81-r0
5.4.82-r0
5.10.0-r0
5.10.1-r0
5.10.1-r1
5.10.2-r0
5.10.3-r0

Alpine:v3.15 / xen

Package

Name
xen
Purl
pkg:apk/alpine/xen?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0

Alpine:v3.16 / linux-lts

Package

Name
linux-lts
Purl
pkg:apk/alpine/linux-lts?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.4-r0

Affected versions

5.*

5.4.0-r1
5.4.0-r2
5.4.0-r3
5.4.1-r0
5.4.2-r0
5.4.3-r0
5.4.4-r0
5.4.4-r1
5.4.5-r0
5.4.6-r0
5.4.7-r0
5.4.8-r0
5.4.10-r0
5.4.11-r0
5.4.12-r0
5.4.12-r1
5.4.13-r1
5.4.14-r0
5.4.16-r0
5.4.17-r0
5.4.18-r0
5.4.20-r0
5.4.20-r1
5.4.21-r0
5.4.22-r0
5.4.23-r0
5.4.23-r1
5.4.24-r1
5.4.25-r0
5.4.26-r0
5.4.27-r0
5.4.28-r0
5.4.29-r0
5.4.30-r0
5.4.31-r0
5.4.32-r0
5.4.33-r0
5.4.34-r0
5.4.35-r0
5.4.36-r0
5.4.38-r0
5.4.39-r0
5.4.40-r0
5.4.41-r0
5.4.42-r0
5.4.42-r1
5.4.43-r0
5.4.43-r1
5.4.44-r0
5.4.45-r0
5.4.46-r0
5.4.46-r1
5.4.47-r0
5.4.47-r1
5.4.48-r0
5.4.49-r0
5.4.50-r0
5.4.51-r0
5.4.52-r0
5.4.53-r0
5.4.54-r0
5.4.54-r1
5.4.54-r2
5.4.55-r0
5.4.57-r0
5.4.57-r1
5.4.58-r0
5.4.59-r0
5.4.60-r0
5.4.61-r0
5.4.61-r1
5.4.62-r0
5.4.63-r0
5.4.64-r0
5.4.65-r0
5.4.66-r0
5.4.67-r0
5.4.68-r0
5.4.69-r0
5.4.70-r0
5.4.71-r0
5.4.72-r0
5.4.73-r0
5.4.74-r0
5.4.75-r0
5.4.77-r0
5.4.78-r0
5.4.79-r0
5.4.80-r0
5.4.81-r0
5.4.82-r0
5.10.0-r0
5.10.1-r0
5.10.1-r1
5.10.2-r0
5.10.3-r0

Alpine:v3.16 / xen

Package

Name
xen
Purl
pkg:apk/alpine/xen?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0

Alpine:v3.17 / linux-lts

Package

Name
linux-lts
Purl
pkg:apk/alpine/linux-lts?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.4-r0

Affected versions

5.*

5.4.0-r1
5.4.0-r2
5.4.0-r3
5.4.1-r0
5.4.2-r0
5.4.3-r0
5.4.4-r0
5.4.4-r1
5.4.5-r0
5.4.6-r0
5.4.7-r0
5.4.8-r0
5.4.10-r0
5.4.11-r0
5.4.12-r0
5.4.12-r1
5.4.13-r1
5.4.14-r0
5.4.16-r0
5.4.17-r0
5.4.18-r0
5.4.20-r0
5.4.20-r1
5.4.21-r0
5.4.22-r0
5.4.23-r0
5.4.23-r1
5.4.24-r1
5.4.25-r0
5.4.26-r0
5.4.27-r0
5.4.28-r0
5.4.29-r0
5.4.30-r0
5.4.31-r0
5.4.32-r0
5.4.33-r0
5.4.34-r0
5.4.35-r0
5.4.36-r0
5.4.38-r0
5.4.39-r0
5.4.40-r0
5.4.41-r0
5.4.42-r0
5.4.42-r1
5.4.43-r0
5.4.43-r1
5.4.44-r0
5.4.45-r0
5.4.46-r0
5.4.46-r1
5.4.47-r0
5.4.47-r1
5.4.48-r0
5.4.49-r0
5.4.50-r0
5.4.51-r0
5.4.52-r0
5.4.53-r0
5.4.54-r0
5.4.54-r1
5.4.54-r2
5.4.55-r0
5.4.57-r0
5.4.57-r1
5.4.58-r0
5.4.59-r0
5.4.60-r0
5.4.61-r0
5.4.61-r1
5.4.62-r0
5.4.63-r0
5.4.64-r0
5.4.65-r0
5.4.66-r0
5.4.67-r0
5.4.68-r0
5.4.69-r0
5.4.70-r0
5.4.71-r0
5.4.72-r0
5.4.73-r0
5.4.74-r0
5.4.75-r0
5.4.77-r0
5.4.78-r0
5.4.79-r0
5.4.80-r0
5.4.81-r0
5.4.82-r0
5.10.0-r0
5.10.1-r0
5.10.1-r1
5.10.2-r0
5.10.3-r0

Alpine:v3.17 / xen

Package

Name
xen
Purl
pkg:apk/alpine/xen?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0

Alpine:v3.18 / linux-lts

Package

Name
linux-lts
Purl
pkg:apk/alpine/linux-lts?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.4-r0

Affected versions

5.*

5.4.0-r1
5.4.0-r2
5.4.0-r3
5.4.1-r0
5.4.2-r0
5.4.3-r0
5.4.4-r0
5.4.4-r1
5.4.5-r0
5.4.6-r0
5.4.7-r0
5.4.8-r0
5.4.10-r0
5.4.11-r0
5.4.12-r0
5.4.12-r1
5.4.13-r1
5.4.14-r0
5.4.16-r0
5.4.17-r0
5.4.18-r0
5.4.20-r0
5.4.20-r1
5.4.21-r0
5.4.22-r0
5.4.23-r0
5.4.23-r1
5.4.24-r1
5.4.25-r0
5.4.26-r0
5.4.27-r0
5.4.28-r0
5.4.29-r0
5.4.30-r0
5.4.31-r0
5.4.32-r0
5.4.33-r0
5.4.34-r0
5.4.35-r0
5.4.36-r0
5.4.38-r0
5.4.39-r0
5.4.40-r0
5.4.41-r0
5.4.42-r0
5.4.42-r1
5.4.43-r0
5.4.43-r1
5.4.44-r0
5.4.45-r0
5.4.46-r0
5.4.46-r1
5.4.47-r0
5.4.47-r1
5.4.48-r0
5.4.49-r0
5.4.50-r0
5.4.51-r0
5.4.52-r0
5.4.53-r0
5.4.54-r0
5.4.54-r1
5.4.54-r2
5.4.55-r0
5.4.57-r0
5.4.57-r1
5.4.58-r0
5.4.59-r0
5.4.60-r0
5.4.61-r0
5.4.61-r1
5.4.62-r0
5.4.63-r0
5.4.64-r0
5.4.65-r0
5.4.66-r0
5.4.67-r0
5.4.68-r0
5.4.69-r0
5.4.70-r0
5.4.71-r0
5.4.72-r0
5.4.73-r0
5.4.74-r0
5.4.75-r0
5.4.77-r0
5.4.78-r0
5.4.79-r0
5.4.80-r0
5.4.81-r0
5.4.82-r0
5.10.0-r0
5.10.1-r0
5.10.1-r1
5.10.2-r0
5.10.3-r0

Alpine:v3.18 / xen

Package

Name
xen
Purl
pkg:apk/alpine/xen?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0

Alpine:v3.19 / linux-lts

Package

Name
linux-lts
Purl
pkg:apk/alpine/linux-lts?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.4-r0

Affected versions

5.*

5.4.0-r1
5.4.0-r2
5.4.0-r3
5.4.1-r0
5.4.2-r0
5.4.3-r0
5.4.4-r0
5.4.4-r1
5.4.5-r0
5.4.6-r0
5.4.7-r0
5.4.8-r0
5.4.10-r0
5.4.11-r0
5.4.12-r0
5.4.12-r1
5.4.13-r1
5.4.14-r0
5.4.16-r0
5.4.17-r0
5.4.18-r0
5.4.20-r0
5.4.20-r1
5.4.21-r0
5.4.22-r0
5.4.23-r0
5.4.23-r1
5.4.24-r1
5.4.25-r0
5.4.26-r0
5.4.27-r0
5.4.28-r0
5.4.29-r0
5.4.30-r0
5.4.31-r0
5.4.32-r0
5.4.33-r0
5.4.34-r0
5.4.35-r0
5.4.36-r0
5.4.38-r0
5.4.39-r0
5.4.40-r0
5.4.41-r0
5.4.42-r0
5.4.42-r1
5.4.43-r0
5.4.43-r1
5.4.44-r0
5.4.45-r0
5.4.46-r0
5.4.46-r1
5.4.47-r0
5.4.47-r1
5.4.48-r0
5.4.49-r0
5.4.50-r0
5.4.51-r0
5.4.52-r0
5.4.53-r0
5.4.54-r0
5.4.54-r1
5.4.54-r2
5.4.55-r0
5.4.57-r0
5.4.57-r1
5.4.58-r0
5.4.59-r0
5.4.60-r0
5.4.61-r0
5.4.61-r1
5.4.62-r0
5.4.63-r0
5.4.64-r0
5.4.65-r0
5.4.66-r0
5.4.67-r0
5.4.68-r0
5.4.69-r0
5.4.70-r0
5.4.71-r0
5.4.72-r0
5.4.73-r0
5.4.74-r0
5.4.75-r0
5.4.77-r0
5.4.78-r0
5.4.79-r0
5.4.80-r0
5.4.81-r0
5.4.82-r0
5.10.0-r0
5.10.1-r0
5.10.1-r1
5.10.2-r0
5.10.3-r0

Alpine:v3.19 / xen

Package

Name
xen
Purl
pkg:apk/alpine/xen?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0

Alpine:v3.20 / linux-lts

Package

Name
linux-lts
Purl
pkg:apk/alpine/linux-lts?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.10.4-r0

Affected versions

5.*

5.4.0-r1
5.4.0-r2
5.4.0-r3
5.4.1-r0
5.4.2-r0
5.4.3-r0
5.4.4-r0
5.4.4-r1
5.4.5-r0
5.4.6-r0
5.4.7-r0
5.4.8-r0
5.4.10-r0
5.4.11-r0
5.4.12-r0
5.4.12-r1
5.4.13-r1
5.4.14-r0
5.4.16-r0
5.4.17-r0
5.4.18-r0
5.4.20-r0
5.4.20-r1
5.4.21-r0
5.4.22-r0
5.4.23-r0
5.4.23-r1
5.4.24-r1
5.4.25-r0
5.4.26-r0
5.4.27-r0
5.4.28-r0
5.4.29-r0
5.4.30-r0
5.4.31-r0
5.4.32-r0
5.4.33-r0
5.4.34-r0
5.4.35-r0
5.4.36-r0
5.4.38-r0
5.4.39-r0
5.4.40-r0
5.4.41-r0
5.4.42-r0
5.4.42-r1
5.4.43-r0
5.4.43-r1
5.4.44-r0
5.4.45-r0
5.4.46-r0
5.4.46-r1
5.4.47-r0
5.4.47-r1
5.4.48-r0
5.4.49-r0
5.4.50-r0
5.4.51-r0
5.4.52-r0
5.4.53-r0
5.4.54-r0
5.4.54-r1
5.4.54-r2
5.4.55-r0
5.4.57-r0
5.4.57-r1
5.4.58-r0
5.4.59-r0
5.4.60-r0
5.4.61-r0
5.4.61-r1
5.4.62-r0
5.4.63-r0
5.4.64-r0
5.4.65-r0
5.4.66-r0
5.4.67-r0
5.4.68-r0
5.4.69-r0
5.4.70-r0
5.4.71-r0
5.4.72-r0
5.4.73-r0
5.4.74-r0
5.4.75-r0
5.4.77-r0
5.4.78-r0
5.4.79-r0
5.4.80-r0
5.4.81-r0
5.4.82-r0
5.10.0-r0
5.10.1-r0
5.10.1-r1
5.10.2-r0
5.10.3-r0

Alpine:v3.20 / xen

Package

Name
xen
Purl
pkg:apk/alpine/xen?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0

Debian:11 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.9.15-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.9.15-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.9.15-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}