CVE-2018-6344

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.9% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2018-12-31 · updated 2026-06-17
Weakness: CWE-122

Description

A heap corruption in WhatsApp can be caused by a malformed RTP packet being sent after a call is established. The vulnerability can be used to cause denial of service. It affects WhatsApp for Android prior to v2.18.293, WhatsApp for iOS prior to v2.18.93, and WhatsApp for Windows Phone prior to v2.18.172.

Affected products

Facebook WhatsApp for Android: before 2.18.93; before 2.18.172; before 2.18.293 — fixed in 2.18.172, 2.18.293, 2.18.93

How to fix

Upgrade to a fixed version: Facebook WhatsApp for Android 2.18.172, 2.18.293, 2.18.93. Check the vendor advisory for mitigations.

References

http://www.securityfocus.com/bid/106365
https://googleprojectzero.blogspot.com/2018/12/adventures-in-video-conferencing-part-3.html
http://www.securityfocus.com/bid/106365
https://googleprojectzero.blogspot.com/2018/12/adventures-in-video-conferencing-part-3.html

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