CVE-2024-3861

Publication date 16 April 2024

Last updated 26 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

If an AlignedBuffer were assigned to itself, the subsequent self-move could result in an incorrect reference count and later use-after-free. This vulnerability affects Firefox < 125, Firefox ESR < 115.10, and Thunderbird < 115.10.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
firefox	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Fixed 125.0.2+build1-0ubuntu0.20.04.2
thunderbird	24.04 LTS noble	Not affected
	23.10 mantic	Fixed 1:115.10.1+build1-0ubuntu0.23.10.1
	22.04 LTS jammy	Fixed 1:115.10.1+build1-0ubuntu0.22.04.1
	20.04 LTS focal	Fixed 1:115.10.1+build1-0ubuntu0.20.04.1
mozjs38	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Ignored
mozjs52	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Ignored
	18.04 LTS bionic	Ignored
mozjs68	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	22.04 LTS jammy	Not in release
	20.04 LTS focal	Ignored
mozjs78	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	22.04 LTS jammy	Ignored
	20.04 LTS focal	Not in release
mozjs91	24.04 LTS noble	Not in release
	23.10 mantic	Not in release
	22.04 LTS jammy	Ignored
	20.04 LTS focal	Not in release
mozjs102	24.04 LTS noble	Ignored
	23.10 mantic	Ignored end of life, was needs-triage
	22.04 LTS jammy	Ignored
	20.04 LTS focal	Not in release

Notes

tyhicks

mozjs contains a copy of the SpiderMonkey JavaScript engine

mdeslaur

starting with Ubuntu 22.04, the firefox package is just a script that installs the Firefox snap

Severity score breakdown

Parameter	Value
Base score	4.0 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N