CVE-2025-14333

Publication date 9 December 2025

Last updated 14 May 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

8.1 · High

Score breakdown

Description

Memory safety bugs present in Firefox ESR 140.5, Thunderbird ESR 140.5, Firefox 145 and Thunderbird 145. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.

Read the notes from the security team

Status

Package Ubuntu Release Status
firefox 26.04 LTS resolute
Not affected
25.10 questing
Not affected
25.04 plucky
Not affected
24.04 LTS noble
Not affected
22.04 LTS jammy
Not affected
mozjs102 26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Ignored
22.04 LTS jammy Ignored
mozjs115 26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Ignored
24.04 LTS noble Ignored
22.04 LTS jammy Not in release
mozjs38 26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
18.04 LTS bionic
Needs evaluation
mozjs52 26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Ignored
18.04 LTS bionic Ignored
mozjs68 26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Not in release
20.04 LTS focal Ignored
mozjs78 26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Ignored
mozjs91 26.04 LTS resolute Not in release
25.10 questing Not in release
25.04 plucky Not in release
24.04 LTS noble Not in release
22.04 LTS jammy Ignored
thunderbird 26.04 LTS resolute
Not affected
25.10 questing
Not affected
25.04 plucky
Not affected
24.04 LTS noble
Not affected
22.04 LTS jammy
Fixed 1:140.7.1+build1-0ubuntu0.22.04.1

Notes

mdeslaur

mozjs* contain a copy of the SpiderMonkey JavaScript engine. It is not feasible to backport security fixes to the mozjs* packages, as such, marking them as ignored. starting with Ubuntu 22.04, the firefox package is just a script that installs the Firefox snap starting with Ubuntu 24.04, the thunderbird package is just a script that installs the Thunderbird snap

Severity score breakdown

CVSS version: CVSS v3.0

Base score 8.1 · High

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Other references

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