CVE-2024-0743 Null dereference in Firefox

What is CVE-2024-0743?

CVE-2024-0743 is a high-severity vulnerability in Mozilla Firefox, published on 23 Jan 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An unchecked return value in TLS handshake code could have caused a potentially exploitable crash. This vulnerability affects Firefox < 122, Firefox ESR < 115.9, and Thunderbird < 115.9.

Weakness: CWE-252

Which versions are affected by CVE-2024-0743?

It affects 1 product.

Products include Mozilla Firefox.

How do I fix CVE-2024-0743?

Upgrade to a fixed version.

Is CVE-2024-0743 being exploited?

There is no known exploitation of CVE-2024-0743 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 CLSA-2026-1785841535, CLSA-2026-1786093558, CLSA-2026-1786358092, CLSA-2026-1786358095, CLSA-2026-1786532297, CLSA-2026-1786539653 and 4 more.