high
7.1
CWE
476 20
Advisory Published
CVE Published
Updated

CVE-2020-11668: Null Pointer Dereference

First published: Fri Jan 03 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.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
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 Kernel<5.6.1
debian/linux
5.10.223-1
5.10.226-1
6.1.123-1
6.1.128-1
6.12.12-1
6.12.13-1

Remedy

Mitigation for this issue is to skip loading the affected module 'xirlink-cit' onto the system till we have a fix available, this can be done by a blacklist mechanism, this will ensure the driver is not loaded at the boot time. ~~~ How do I blacklist a kernel module to prevent it from loading automatically? https://access.redhat.com/solutions/41278 ~~~

Remedy

https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a246b4d547708f33ff4d4b9a7a5dbac741dc89d8

Remedy

https://github.com/torvalds/linux/commit/a246b4d547708f33ff4d4b9a7a5dbac741dc89d8

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • 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.

  • How do I mitigate CVE-2020-11668?

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

  • What systems are affected by CVE-2020-11668?

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

  • 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.

  • 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.

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