CVE-2020-15681 Race condition in Firefox

What is CVE-2020-15681?

CVE-2020-15681 is a high-severity vulnerability in Mozilla Firefox, published on 22 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

When multiple WASM threads had a reference to a module, and were looking up exported functions, one WASM thread could have overwritten another's entry in a shared stub table, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 82.

Which versions are affected by CVE-2020-15681?

It affects 1 product.

Products include Mozilla Firefox.

How do I fix CVE-2020-15681?

Upgrade to a fixed version.

Is CVE-2020-15681 being exploited?

There is no known exploitation of CVE-2020-15681 in the wild and no public exploit code.

Other vulnerabilities in Mozilla Firefox

• CVE-2019-11708 Mozilla Firefox and Thunderbird Sandbox Escape Exploited Critical 10.0
• CVE-2010-3765 Mozilla Multiple Products Remote Code Execution Exploited Critical 9.8
• CVE-2022-26486 Mozilla Firefox Use-After-Free Exploited Critical 9.6
• CVE-2022-26485 Mozilla Firefox Use-After-Free Exploited High 8.8
• CVE-2019-11707 Mozilla Firefox and Thunderbird Type Confusion Exploited High 8.8

All Mozilla Firefox vulnerabilities

Sources

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

Also known as GHSA-5fqm-5hwj-59mf, UBUNTU-CVE-2020-15681.