CVE-2022-27666: Buffer Overflow

Published Mar 8, 2022
·
Updated

A heap buffer overflow flaw was found in IPsec ESP transformation code in net/ipv4/esp4.c and net/ipv6/esp6.c. This flaw allows a local attacker with a normal user privilege to overwrite kernel heap objects and may cause a local privilege escalation threat.

Affected Software

65 affected componentsFixes available
redhat/kernel-rt<0:4.18.0-372.13.1.rt7.170.el8_6
0:4.18.0-372.13.1.rt7.170.el8_6
redhat/kernel<0:4.18.0-372.13.1.el8_6
0:4.18.0-372.13.1.el8_6
redhat/kernel<0:4.18.0-147.67.1.el8_1
0:4.18.0-147.67.1.el8_1
redhat/kernel-rt<0:4.18.0-193.87.1.rt13.137.el8_2
0:4.18.0-193.87.1.rt13.137.el8_2
redhat/kernel<0:4.18.0-193.87.1.el8_2
0:4.18.0-193.87.1.el8_2
redhat/kernel-rt<0:4.18.0-305.49.1.rt7.121.el8_4
0:4.18.0-305.49.1.rt7.121.el8_4
redhat/kernel<0:4.18.0-305.49.1.el8_4
0:4.18.0-305.49.1.el8_4
redhat/kernel<0:5.14.0-70.17.1.el9_0
0:5.14.0-70.17.1.el9_0
redhat/kernel-rt<0:5.14.0-70.17.1.rt21.89.el9_0
0:5.14.0-70.17.1.rt21.89.el9_0
Linux Linux kernel<5.17
Linux Linux kernel=5.17
Linux Linux kernel=5.17-rc1
Linux Linux kernel=5.17-rc2
Linux Linux kernel=5.17-rc3
Linux Linux kernel=5.17-rc4
Linux Linux kernel=5.17-rc5
Linux Linux kernel=5.17-rc6
Linux Linux kernel=5.17-rc7
Fedoraproject Fedora=34
Fedoraproject Fedora=35
redhat Virtualization=4.0
redhat Enterprise Linux=8.0
All of the following
NetApp H300s Firmware
NetApp H300s
All of the following
NetApp H500s Firmware
NetApp H500s
All of the following
NetApp H700s Firmware
NetApp H700s
All of the following
NetApp H300e Firmware
NetApp H300e
All of the following
NetApp H500e Firmware
NetApp H500e
All of the following
NetApp H700e Firmware
NetApp H700e
All of the following
NetApp H410s Firmware
NetApp H410s
All of the following
NetApp H410c Firmware
NetApp H410c
Debian Debian Linux=9.0
Debian Debian Linux=10.0
Debian Debian Linux=11.0
NetApp H300s Firmware
NetApp H300s
NetApp H500s Firmware
NetApp H500s
NetApp H700s Firmware
NetApp H700s
NetApp H300e Firmware
NetApp H300e
NetApp H500e Firmware
NetApp H500e
NetApp H700e Firmware
NetApp H700e
NetApp H410s Firmware
NetApp H410s
NetApp H410c Firmware
NetApp H410c
debian/linux
5.10.223-15.10.234-16.1.129-16.1.135-16.12.25-1
redhat/kernel<5.17
5.17
Linux Linux kernel>=4.11<4.14.274
Linux Linux kernel>=4.15<4.19.237
Linux Linux kernel>=4.20<5.4.188
Linux Linux kernel>=5.5<5.10.108
Linux Linux kernel>=5.11<5.15.29
Linux Linux kernel>=5.16<5.16.15

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 0:4.18.0-372.13.1.rt7.170.el8_6
  2. Upgrade

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

    Fixed in 0:4.18.0-372.13.1.el8_6
  3. Upgrade

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

    Fixed in 0:4.18.0-147.67.1.el8_1
  4. Upgrade

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

    Fixed in 0:4.18.0-193.87.1.rt13.137.el8_2
  5. Upgrade

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

    Fixed in 0:4.18.0-193.87.1.el8_2
  6. Upgrade

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

    Fixed in 0:4.18.0-305.49.1.rt7.121.el8_4
  7. Upgrade

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

    Fixed in 0:4.18.0-305.49.1.el8_4
  8. Upgrade

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

    Fixed in 0:5.14.0-70.17.1.el9_0
  9. Upgrade

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

    Fixed in 0:5.14.0-70.17.1.rt21.89.el9_0
  10. 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 6.12.25-1
  11. Upgrade

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

    Fixed in 5.17
  12. Configuration

    On non-containerized deployments of Red Hat Enterprise Linux 8, disable unprivileged user namespaces by setting user.max_user_namespaces to 0 (e.g., write user.max_user_namespaces=0 to /etc/sysctl.d/userns.conf and apply with sysctl -p /etc/sysctl.d/userns.conf). Do not use this mitigation on containerized deployments (e.g., Red Hat OpenShift Container Platform) where the functionality is needed.

    Linux kernel user namespaces (sysctl) user.max_user_namespaces = 0

Event History

Mar 8, 2022
Data Sourced
via Red Hat·05:31 AM
DescriptionSeverityAffected Software
Mar 11, 2022
CVE Published
06:30 AM
Mar 23, 2022
CVE Published
via MITRE·05:07 AM
Data Sourced
via MITRE·05:07 AM
Description
Data Sourced
via NVD·06:15 AM
RemedyDescriptionSeverityWeaknessAffected Software
Jan 12, 2024
Data Sourced
via Launchpad·12:07 AM
Description
Apr 28, 2025
Data Sourced
via Ubuntu·04:37 AM
RemedyDescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

What is the severity of CVE-2022-27666?

CVE-2022-27666 is classified as a critical vulnerability due to its potential for local privilege escalation.

2

How do I fix CVE-2022-27666?

To remediate CVE-2022-27666, upgrade to kernel version 0:4.18.0-372.13.1.rt7.170.el8_6 or later for affected Red Hat distributions.

3

Which software is affected by CVE-2022-27666?

CVE-2022-27666 affects specific kernels including versions of Red Hat kernel and kernel-rt prior to their patched releases.

4

What type of vulnerability is CVE-2022-27666?

CVE-2022-27666 is a heap buffer overflow vulnerability found in IPsec ESP transformation code.

5

Can CVE-2022-27666 be exploited remotely?

CVE-2022-27666 is a local privilege escalation vulnerability, meaning it requires local user access to exploit.

Company

Resources

Contact

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