A Firefox security update has been released for Ubuntu Linux 20.04 LTS.

[USN-6218-1] Firefox vulnerability

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Ubuntu Security Notice USN-6218-1
July 12, 2023

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

- Ubuntu 20.04 LTS

Summary:

Firefox could be made to crash or run programs as your login.

Software Description:
- firefox: Mozilla Open Source web browser

Details:

A use-after-free was discovered in Firefox when handling workers. An
attacker could potentially exploit this to cause a denial of service, or
execute arbitrary code.

Update instructions:

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

Ubuntu 20.04 LTS:
firefox 115.0.2+build1-0ubuntu0.20.04.1

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

References:
https://ubuntu.com/security/notices/USN-6218-1
CVE-2023-3600

Package Information:
https://launchpad.net/ubuntu/+source/firefox/115.0.2+build1-0ubuntu0.20.04.1