CVE-2020-11668: Null Pointer Dereference

Published Jan 3, 2020
·
Updated

A NULL pointer dereference flaw was found in the Xirlink camera USB driver 'xirlink-cit' in the Linux kernel. The driver mishandles invalid descriptors leading to a denial-of-service (DoS). This could allow a local attacker with user privilege to crash the system or leak kernel internal information.

Other sources

In the Linux kernel before 5.6.1, drivers/media/usb/gspca/xirlinkcit.c (aka the Xirlink camera USB driver) mishandles invalid descriptors, aka CID-a246b4d54770.

— Ubuntu

Affected Software

6 affected componentsFixes available
redhat/kernel-rt<0:3.10.0-1160.36.2.rt56.1179.el7
0:3.10.0-1160.36.2.rt56.1179.el7
redhat/kernel<0:3.10.0-1160.36.2.el7
0:3.10.0-1160.36.2.el7
redhat/kernel-rt<0:4.18.0-240.rt7.54.el8
0:4.18.0-240.rt7.54.el8
redhat/kernel<0:4.18.0-240.el8
0:4.18.0-240.el8
Linux Linux kernel<5.6.1
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 0:3.10.0-1160.36.2.rt56.1179.el7
  2. Upgrade

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

    Fixed in 0:3.10.0-1160.36.2.el7
  3. Upgrade

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

    Fixed in 0:4.18.0-240.rt7.54.el8
  4. Upgrade

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

    Fixed in 0:4.18.0-240.el8
  5. 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
  6. Upgrade

    Upgrade Linux kernel to a version that resolves this vulnerability.

    Fixed in 5.6.1
  7. Configuration

    Blacklist the affected module xirlink-cit so it does not load automatically at boot until a fix is available.

    xirlink-cit kernel module blacklist = xirlink-cit

Event History

Jan 3, 2020
CVE Published
12:00 AM
Apr 9, 2020
Data Sourced
via Ubuntu·12:00 AM
RemedyDescriptionSeverityAffected Software
CVE Published
via MITRE·08:13 PM
Data Sourced
via MITRE·08:13 PM
Description
Data Sourced
via NVD·09:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Apr 16, 2020
Data Sourced
via Red Hat·01:01 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-2020-11668?

CVE-2020-11668 is classified as a denial-of-service vulnerability that can lead to system crashes.

2

How do I mitigate CVE-2020-11668?

To mitigate CVE-2020-11668, update to the recommended kernel versions provided by Red Hat or Debian.

3

What systems are affected by CVE-2020-11668?

CVE-2020-11668 affects specific versions of the Linux kernel and the Xirlink camera USB driver.

4

What type of attack can exploit CVE-2020-11668?

CVE-2020-11668 can be exploited by a local attacker with user privileges to cause a denial-of-service.

5

Is there a patch available for CVE-2020-11668?

Yes, patches for CVE-2020-11668 are available in the latest kernel updates for affected distributions.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203