CVE-2026-2447

Publication date 16 February 2026

Last updated 19 February 2026

Ubuntu priority

Cvss 3 Severity Score

Description

Heap buffer overflow in libvpx. This vulnerability affects Firefox < 147.0.4, Firefox ESR < 140.7.1, Firefox ESR < 115.32.1, Thunderbird < 140.7.2, and Thunderbird < 147.0.2.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
firefox	25.10 questing	Not affected
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Not affected
thunderbird	25.10 questing	Not affected
	24.04 LTS noble	Not affected
	22.04 LTS jammy	Vulnerable
libvpx	25.10 questing	Fixed 1.15.0-2.1ubuntu0.1
	24.04 LTS noble	Fixed 1.14.0-1ubuntu2.3
	22.04 LTS jammy	Fixed 1.11.0-2ubuntu2.5
	20.04 LTS focal	Needs evaluation
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Needs evaluation
	14.04 LTS trusty	Needs evaluation

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

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
libvpx	Upstream: ef5b202 Upstream: https://chromium.googlesource.com/webm/libvpx/+/d5f35ac8d93cba7f7a3f7ddb8f9dc8bd28f785e1%5E%21/#F0 Upstream: d5f35ac

Severity score breakdown

Parameter	Value
Base score	8.8 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-8053-1
libvpx vulnerability
19 February 2026