CVE-2016-5261 Integer overflow in n/a

What is CVE-2016-5261?

CVE-2016-5261 is a high-severity vulnerability in Mozilla Firefox, published on 5 Aug 2016. 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

Integer overflow in the WebSocketChannel class in the WebSockets subsystem in Mozilla Firefox before 48.0 and Firefox ESR < 45.4 allows remote attackers to execute arbitrary code or cause a denial of service (memory corruption) via crafted packets that trigger incorrect buffer-resize operations during buffering.

Weakness: CWE-190

Which versions are affected by CVE-2016-5261?

It affects 1 product.

Products include Mozilla Firefox.

How do I fix CVE-2016-5261?

Upgrade to a fixed version.

Is CVE-2016-5261 being exploited?

There is no known exploitation of CVE-2016-5261 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 DEBIAN-CVE-2016-5261, GHSA-jrqh-qj76-c265, UBUNTU-CVE-2016-5261.