A Firefox security update has been released for Ubuntu Linux 18.04 LTS, 20.04 LTS, and 21.10.

USN-5314-1: Firefox vulnerabilities

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Ubuntu Security Notice USN-5314-1
March 06, 2022

firefox vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Firefox could be made to crash or run programs as your login if it
opened a malicious website.

Software Description:
- firefox: Mozilla Open Source web browser

Details:

A use-after-free was discovered when removing an XSLT parameter in some
circumstances. If a user were tricked into opening a specially crafted
website, an attacker could exploit this to cause a denial of service, or
execute arbitrary code. (CVE-2022-26485)

A use-after-free was discovered in the WebGPU IPC framework. If a user
were tricked into opening a specially crafted website, an attacker could
exploit this to cause a denial of service, or execute arbitrary code.
(CVE-2022-26486)

Update instructions:

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

Ubuntu 21.10:
firefox 97.0.2+build1-0ubuntu0.21.10.1

Ubuntu 20.04 LTS:
firefox 97.0.2+build1-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
firefox 97.0.2+build1-0ubuntu0.18.04.1

After a standard system update you need to restart Firefox to make
all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-5314-1
CVE-2022-26485, CVE-2022-26486

Package Information:

https://launchpad.net/ubuntu/+source/firefox/97.0.2+build1-0ubuntu0.21.10.1

https://launchpad.net/ubuntu/+source/firefox/97.0.2+build1-0ubuntu0.20.04.1

https://launchpad.net/ubuntu/+source/firefox/97.0.2+build1-0ubuntu0.18.04.1