A heap corruption in WhatsApp can be caused by a malformed RTP packet being sent after a call is established.

Published 7 y ago 2018-12-31 · modified 4 mo ago 2026-06-17 · JSON

CVSS

7.5

v3.1 · CNA

CISA KEV

not known exploited

EPSS

1.9%

percentile 80%

Public exploits

none known

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.

CISA SSVC assessment

Exploitation: none
Automatable: yes
Technical impact: partial
Assessed: 18 mo ago 2025-05-06

Exploit prediction (EPSS)

1.95% probability of exploitation in the next 30 days, higher than 80% of all scored CVEs.

CVSS scores

Assigned by	Version	Score	Vector
CISA ADP	3.1	7.5	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`
NVD	3.1	7.5	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`
CNA	3.1	7.5	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`
NVD	2.0	5.0	`AV:N/AC:L/Au:N/C:N/I:N/A:P`

Affected products

Facebook WhatsApp for Android
Facebook WhatsApp for iOS
Facebook WhatsApp for Windows Phone

Classification

Weakness

CWE-122 Heap-based Buffer Overflow
CWE-787 Out-of-bounds Write

References

googleprojectzero.blogspot.com /2018/12/adventures-in-video-conferencing-part-3.html · x_refsource_MISC, x_transferred
securityfocus.com /bid/106365 · vdb-entry, x_refsource_BID, x_transferred

Sources

CVE List: CVE-2018-6344
NVD: CVE-2018-6344

vulnwire keeps one entry per vulnerability: the CVE id wins, then GHSA; records that alias each other are merged. Machine-readable: JSON.

Summary