CVE-2018-6548

Publication date 2 February 2018

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

A use-after-free issue was discovered in libwebm through 2018-02-02. If a Vp9HeaderParser was initialized once before, its property frame_ would not be changed because of code in vp9parser::Vp9HeaderParser::SetFrame. Its frame_ could be freed while the corresponding pointer would not be updated, leading to a dangling pointer. This is related to the function OutputCluster in webm_info.cc.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
chromium-browser	18.10 cosmic	Ignored
	18.04 LTS bionic	Ignored
	17.10 artful	Ignored end of life
	16.04 LTS xenial	Ignored
	14.04 LTS trusty	Not in release
oxide-qt	18.10 cosmic	Not in release
	18.04 LTS bionic	Not in release
	17.10 artful	Ignored end of life
	16.04 LTS xenial	Ignored end of standard support
	14.04 LTS trusty	Not in release

Notes

mdeslaur

marking chromium-browser as ignored as we do full-version upgrades and we rely on upstream's bundled libwebm

Severity score breakdown

CVSS version: CVSS v3.0

Base score 9.8 · Critical

Base metrics

Parameter	Value
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	9.8 · Critical
Exploitability score	-
Impact score	-

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H