CVE-2019-2126 Use after free in Android

What is CVE-2019-2126?

CVE-2019-2126 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 20 Aug 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

In ParseContentEncodingEntry of mkvparser.cc, there is a possible double free due to a missing reset of a freed pointer. This could lead to remote code execution with no additional execution privileges needed. User interaction is needed for exploitation. Product: Android. Versions: Android-7.0 Android-7.1.1 Android-7.1.2 Android-8.0 Android-8.1 Android-9. Android ID: A-127702368.

Weakness: CWE-415

Which versions are affected by CVE-2019-2126?

It affects 4 products.

Products include Canonical Ubuntu Linux, Fedoraproject Fedora, Google Android, Opensuse Leap.

How do I fix CVE-2019-2126?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2019-2126 being exploited?

There is no known exploitation of CVE-2019-2126 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-jxxw-46w4-3vhv, UBUNTU-CVE-2019-2126.