CVE-2022-0492: Linux Kernel Improper Authentication Vulnerability

Published Feb 7, 2022
·
Updated

A vulnerability was found in cgroupreleaseagentwrite in kernel/cgroup/cgroup-v1.c in the Linux kernel. In this flaw, under certain circumstances, the cgroups v1 releaseagent feature can be used to escalate privilege and bypass namespace isolation unexpectedly.

Upstream Commit:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=24f6008564183aa120d07c03d9289519c2fe02af

Other sources

A vulnerability was found in the Linux kernel’s cgroupreleaseagentwrite in the kernel/cgroup/cgroup-v1.c function. This flaw, under certain circumstances, allows the use of the cgroups v1 releaseagent feature to escalate privileges and bypass the namespace isolation unexpectedly.

Linux Kernel contains an improper authentication vulnerability which could allow for privilege escalation via the cgroups v1 releaseagent feature.

— CISA

Affected Software

79 affected componentsFixes available
redhat/kernel<0:2.6.32-754.47.1.el6
0:2.6.32-754.47.1.el6
redhat/kernel-rt<0:3.10.0-1160.66.1.rt56.1207.el7
0:3.10.0-1160.66.1.rt56.1207.el7
redhat/kernel<0:3.10.0-1160.66.1.el7
0:3.10.0-1160.66.1.el7
redhat/kernel<0:3.10.0-514.101.1.el7
0:3.10.0-514.101.1.el7
redhat/kernel<0:3.10.0-693.103.1.el7
0:3.10.0-693.103.1.el7
redhat/kernel<0:3.10.0-957.94.1.el7
0:3.10.0-957.94.1.el7
redhat/kernel<0:3.10.0-1062.67.1.el7
0:3.10.0-1062.67.1.el7
redhat/kernel-rt<0:4.18.0-348.20.1.rt7.150.el8_5
0:4.18.0-348.20.1.rt7.150.el8_5
redhat/kernel<0:4.18.0-348.20.1.el8_5
0:4.18.0-348.20.1.el8_5
redhat/kernel<0:4.18.0-147.64.1.el8_1
0:4.18.0-147.64.1.el8_1
redhat/kernel-rt<0:4.18.0-193.79.1.rt13.129.el8_2
0:4.18.0-193.79.1.rt13.129.el8_2
redhat/kernel<0:4.18.0-193.79.1.el8_2
0:4.18.0-193.79.1.el8_2
redhat/kernel-rt<0:4.18.0-305.45.1.rt7.117.el8_4
0:4.18.0-305.45.1.rt7.117.el8_4
redhat/kernel<0:4.18.0-305.45.1.el8_4
0:4.18.0-305.45.1.el8_4
Linux Linux kernel>=2.6.24<4.9.301
Linux Linux kernel>=4.10<4.14.266
Linux Linux kernel>=4.15<4.19.229
Linux Linux kernel>=4.20<5.4.177
Linux Linux kernel>=5.5<5.10.97
Linux Linux kernel>=5.11<5.15.20
Linux Linux kernel>=5.16<5.16.6
Linux Linux kernel=5.17-rc1
Linux Linux kernel=5.17-rc2
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Debian Debian Linux=11.0
redhat Codeready Linux Builder=8.0
redhat Codeready Linux Builder=8.2
redhat Codeready Linux Builder For Power Little Endian=8.0
redhat Codeready Linux Builder For Power Little Endian=8.2
redhat Virtualization Host=4.0
redhat Enterprise Linux=8.0
redhat Enterprise Linux Eus=8.2
redhat Enterprise Linux For Ibm Z Systems=8.0
redhat Enterprise Linux For Ibm Z Systems Eus=8.0
redhat Enterprise Linux For Power Little Endian=8.0
redhat Enterprise Linux For Power Little Endian Eus=8.0
redhat Enterprise Linux For Real Time For Nfv Tus=8.0
redhat Enterprise Linux For Real Time For Nfv Tus=8.2
redhat Enterprise Linux For Real Time Tus=8.0
redhat Enterprise Linux For Real Time Tus=8.2
redhat Enterprise Linux Server Aus=8.2
redhat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions=8.1
redhat Enterprise Linux Server For Power Little Endian Update Services For Sap Solutions=8.2
redhat Enterprise Linux Server Tus=8.2
redhat Enterprise Linux Server Update Services For Sap Solutions=8.1
redhat Enterprise Linux Server Update Services For Sap Solutions=8.2
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=16.04
Canonical Ubuntu Linux=18.04
Canonical Ubuntu Linux=20.04
Canonical Ubuntu Linux=22.04
Fedoraproject Fedora=35
NetApp Solidfire\, Enterprise Sds \& Hci Storage Node
NetApp Solidfire \& Hci Management Node
NetApp Baseboard Management Controller H300e
NetApp Baseboard Management Controller H300s
NetApp Baseboard Management Controller H410c
NetApp Baseboard Management Controller H410s
NetApp Baseboard Management Controller H500e
NetApp Baseboard Management Controller H500s
NetApp Baseboard Management Controller H700e
NetApp Baseboard Management Controller H700s
NetApp Hci Compute Node
debian/linux
5.10.223-15.10.234-16.1.129-16.1.135-16.12.25-16.12.27-1
redhat/kernel<5.17
5.17
Linux Kernel
All of the following
NetApp H300s Firmware
NetApp H300s
All of the following
NetApp H410c Firmware
NetApp H410c
All of the following
NetApp H410s Firmware
NetApp H410s
All of the following
NetApp H500s Firmware
NetApp H500s
All of the following
NetApp H700s Firmware
NetApp H700s
All of the following
NetApp Bootstrap Os
NetApp Hci Compute Node

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:2.6.32-754.47.1.el6
  2. Upgrade

    Upgrade redhat/kernel-rt to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-1160.66.1.rt56.1207.el7
  3. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-1160.66.1.el7
  4. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-514.101.1.el7
  5. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-693.103.1.el7
  6. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-957.94.1.el7
  7. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:3.10.0-1062.67.1.el7
  8. Upgrade

    Upgrade redhat/kernel-rt to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-348.20.1.rt7.150.el8_5
  9. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-348.20.1.el8_5
  10. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-147.64.1.el8_1
  11. Upgrade

    Upgrade redhat/kernel-rt to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-193.79.1.rt13.129.el8_2
  12. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-193.79.1.el8_2
  13. Upgrade

    Upgrade redhat/kernel-rt to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-305.45.1.rt7.117.el8_4
  14. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 0:4.18.0-305.45.1.el8_4
  15. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 5.10.223-1Fixed in 5.10.234-1Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.25-1Fixed in 6.12.27-1
  16. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 5.17
  17. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 5.10.223-1
  18. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 5.10.234-1
  19. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.1.129-1
  20. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.1.135-1
  21. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.12.25-1
  22. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.12.27-1
  23. Remove

    Remove debian/linux from your environment.

    Discontinue use of this product if vendor mitigations are unavailable or cannot be applied.

  24. Remove

    Remove redhat/kernel from your environment.

    Discontinue use of this product if vendor mitigations are unavailable or cannot be applied.

  25. Remove

    Remove redhat/kernel-rt from your environment.

    Discontinue use of this product if vendor mitigations are unavailable or cannot be applied.

  26. Compensating control

    Apply vendor-provided mitigations per vendor instructions and follow applicable BOD 22-01 guidance for cloud services; restrict or isolate vulnerable systems until fixes are applied.

Event History

Feb 7, 2022
CVE Published
12:00 AM
Data Sourced
via Red Hat·11:36 AM
DescriptionSeverityAffected Software
Mar 3, 2022
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
DescriptionWeakness
Data Sourced
via NVD·07:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Jan 12, 2024
Data Sourced
via Launchpad·12:03 AM
Description
May 10, 2025
Data Sourced
via Ubuntu·04:36 AM
RemedyDescriptionSeverityAffected Software
Jun 2, 2026
Known Exploited
via CISA·12:00 AM
Data Sourced
via CISA·12:00 AM
RemedyDescriptionAffected Software
Jun 3, 2026
News Published
via BleepingComputer·03:36 PM
News Published
via BleepingComputer·03:38 PM

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2022-0492?

CVE-2022-0492 has a high severity rating due to its potential to escalate privileges and bypass namespace isolation.

2

How do I fix CVE-2022-0492?

To fix CVE-2022-0492, update to the latest version of the Linux kernel as specified in Red Hat's errata.

3

Which versions of the Linux kernel are affected by CVE-2022-0492?

CVE-2022-0492 affects various versions of the Linux kernel, including 2.6.32 and all versions up to 5.17.

4

Is CVE-2022-0492 a remote exploit?

CVE-2022-0492 is not classified as a remote exploit; it requires local access to exploit the vulnerability.

5

What types of systems are vulnerable to CVE-2022-0492?

CVE-2022-0492 affects systems running affected versions of the Linux kernel, including various distributions like Red Hat and Debian.

Company

Resources

Contact

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