CVE-2021-24042 Memory corruption in WhatsApp Business for Android

What is CVE-2021-24042?

CVE-2021-24042 is a critical memory corruption vulnerability in Facebook WhatsApp Business for Android, published on 4 Jan 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The calling logic for WhatsApp for Android prior to v2.21.23, WhatsApp Business for Android prior to v2.21.23, WhatsApp for iOS prior to v2.21.230, WhatsApp Business for iOS prior to v2.21.230, WhatsApp for KaiOS prior to v2.2143, WhatsApp Desktop prior to v2.2146 could have allowed an out-of-bounds write if a user makes a 1:1 call to a malicious actor.

Weakness: CWE-787, CWE-122

Which versions are affected by CVE-2021-24042?

It affects 1 product.

Products include Whatsapp Whatsapp.

How do I fix CVE-2021-24042?

No fix has been published for CVE-2021-24042 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-24042 being exploited?

There is no known exploitation of CVE-2021-24042 in the wild and no public exploit code.

Other vulnerabilities in Facebook WhatsApp Business for Android

• CVE-2019-3568 WhatsApp VOIP Stack Buffer Overflow Exploited Critical 9.8
• CVE-2019-18426 WhatsApp Cross-Site Scripting Exploited High 8.2
• CVE-2025-55177 Meta Platforms WhatsApp Incorrect Authorization Exploited Medium 5.4
• CVE-2022-36934 Integer overflow in WhatsApp Business for Android Critical 9.8
• CVE-2021-24041 Memory corruption in WhatsApp Business for Android Critical 9.8

Sources

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

Also known as GHSA-mp5j-h5hx-cfxc.