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Ubuntu 14.04 LTS: Linux Kernel Critical DoS Flaws USN-7720-1 CVE-2021-0920

ubuntu
Calendar Grey August 27, 2025
Dist Ubuntu Esm H88
Ubuntu 14.04 LTS has been updated with essential patches for the Linux kernel, addressing severe vulnerabilities. Prompt measures are recommended.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

Details:

It was discovered a race condition existed in the Unix domain socket

implementation in the Linux kernel, leading to a use-after-free

vulnerability. A local attacker could use this to cause a denial of service

(system crash) or possibly execute arbitrary code. (CVE-2021-0920)

Several security issues were discovered in the Linux kernel.

An attacker could possibly use these to compromise the system.

This update corrects flaws in the following subsystems:

- HID subsystem;

- Media drivers;

(CVE-2024-50302, CVE-2024-53104)

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu local attack Linux kernel

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.04 LTS
   linux-image-3.13.0-207-generic  3.13.0-207.258
                                   Available with Ubuntu Pro
   linux-image-3.13.0-207-lowlatency  3.13.0-207.258
                                   Available with Ubuntu Pro
   linux-image-generic             3.13.0.207.217
                                   Available with Ubuntu Pro
   linux-image-generic-lts-trusty  3.13.0.207.217
                                   Available with Ubuntu Pro
   linux-image-lowlatency          3.13.0.207.217
                                   Available with Ubuntu Pro
   linux-image-server              3.13.0.207.217
                                   Available with Ubuntu Pro
   linux-image-virtual             3.13.0.207.217
                                   Available with Ubuntu Pro

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

https://ubuntu.com/security/notices/USN-7720-1

CVE-2021-0920, CVE-2024-50302, CVE-2024-53104

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7720-1

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu local attack Linux kernel

Package Information

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