CVE-2025-9179

Description

An attacker was able to perform memory corruption in the GMP process which processes encrypted media. This process is also heavily sandboxed, but represents slightly different privileges from the content process. This vulnerability was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.

Read the notes from the security team

Status

Show unmaintained releases

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
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
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
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

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

Parameter	Value
Base score	9.8 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-7991-1
Thunderbird vulnerabilities
2 February 2026

Cvss 3 Severity Score