CVE-2022-4269: Medium severity Linux Linux kernel vulnerability

Published Sep 23, 2022
·
Updated

A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking configuration (redirecting egress packets to ingress using TC action "mirred") a local unprivileged user could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use (TCP or SCTP) does a retransmission, resulting in a denial of service condition.

Other sources

Using a specific networking configuration (that redirect egress packets to ingress using TC "mirred"), unprivileged users can trigger a soft-lockup (ABBA deadlock) in the Linux kernel, when the transport protocol in use (TCP or SCTP) does a retransmission.

Upstream discussion: https://lore.kernel.org/netdev/33dc43f587ec1388ba456b4915c75f02a8aae226.1663945716.git.dcaratti@redhat.com/

— Red Hat

Affected Software

15 affected componentsFixes available
redhat/kernel-rt<0:4.18.0-425.19.2.rt7.230.el8_7
0:4.18.0-425.19.2.rt7.230.el8_7
redhat/kernel<0:4.18.0-425.19.2.el8_7
0:4.18.0-425.19.2.el8_7
redhat/kernel-rt<0:4.18.0-305.82.1.rt7.154.el8_4
0:4.18.0-305.82.1.rt7.154.el8_4
redhat/kernel<0:4.18.0-305.82.1.el8_4
0:4.18.0-305.82.1.el8_4
redhat/kernel<0:4.18.0-372.46.1.el8_6
0:4.18.0-372.46.1.el8_6
redhat/kernel<0:5.14.0-162.22.2.el9_1
0:5.14.0-162.22.2.el9_1
redhat/kernel-rt<0:5.14.0-162.22.2.rt21.186.el9_1
0:5.14.0-162.22.2.rt21.186.el9_1
redhat/kernel<0:5.14.0-70.49.1.el9_0
0:5.14.0-70.49.1.el9_0
redhat/kernel-rt<0:5.14.0-70.49.1.rt21.120.el9_0
0:5.14.0-70.49.1.rt21.120.el9_0
Linux Linux kernel=4.1-rc1
redhat/kernel<6.3
6.3
debian/linux<6.1.20-2
6.1.20-2
debian/linux<6.1.20-2
6.1.20-2
debian/linux<6.1.20-2
6.1.20-2
debian/linux
6.1.176-16.1.190-16.12.107-16.12.115-27.2.12-17.2.15-1

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 0:4.18.0-425.19.2.rt7.230.el8_7
  2. Upgrade

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

    Fixed in 0:4.18.0-425.19.2.el8_7
  3. Upgrade

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

    Fixed in 0:4.18.0-305.82.1.rt7.154.el8_4
  4. Upgrade

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

    Fixed in 0:4.18.0-305.82.1.el8_4
  5. Upgrade

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

    Fixed in 0:4.18.0-372.46.1.el8_6
  6. Upgrade

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

    Fixed in 0:5.14.0-162.22.2.el9_1
  7. Upgrade

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

    Fixed in 0:5.14.0-162.22.2.rt21.186.el9_1
  8. Upgrade

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

    Fixed in 0:5.14.0-70.49.1.el9_0
  9. Upgrade

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

    Fixed in 0:5.14.0-70.49.1.rt21.120.el9_0
  10. Upgrade

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

    Fixed in 6.3
  11. Upgrade

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

    Fixed in 6.1.20-2
  12. Upgrade

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

    Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.115-2Fixed in 7.2.12-1Fixed in 7.2.15-1

Event History

Sep 23, 2022
CVE Published
12:00 AM
Dec 2, 2022
Data Sourced
via Red Hat·10:49 AM
DescriptionSeverityAffected Software
Dec 5, 2022
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
DescriptionWeakness
Data Sourced
via NVD·04:15 PM
DescriptionSeverityWeaknessAffected Software
Data Sourced
via OSV·04:15 PM
DescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2022-4269?

CVE-2022-4269 is classified as a high-severity vulnerability due to its potential to cause a CPU soft lockup.

2

How do I fix CVE-2022-4269?

To fix CVE-2022-4269, users should upgrade to the appropriate patched version of the kernel as specified in the vulnerability details.

3

Which versions of the Linux kernel are affected by CVE-2022-4269?

CVE-2022-4269 affects multiple versions of the Linux kernel including certain kernel-rt and kernel packages up to version 5.14.0-162.22.2.

4

Is CVE-2022-4269 exploitable remotely?

CVE-2022-4269 is not considered exploitable remotely, as it requires local access to trigger the vulnerability.

5

What types of systems are impacted by CVE-2022-4269?

CVE-2022-4269 impacts systems running specific versions of the Linux kernel, particularly those configured to use the Traffic Control subsystem.

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