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Vulnerability record · CVE-2018-6339 · published 14 June 2019

CVE-2018-6339: Whatsapp stack-based buffer overflow vulnerability

Whatsapp · Whatsapp

When receiving calls using WhatsApp on Android, a stack allocation failed to properly account for the amount of data being passed in. An off-by-one error meant that data was written beyond the allocated space on the stack. This issue affects WhatsApp for Android starting in version 2.18.180 and was fixed in version 2.18.295. It also affects WhatsApp Business for Android starting in version v2.18.103 and was fixed in version v2.18.150.

9.8 CVSS 3.0 Critical EPSS 1.5% · top 25.5% CWE-121 · Stack-based buffer overflowCWE-119 · Memory buffer overflow
9.8CVSS 3.0 base score, v2 7.5
1.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

When receiving calls using WhatsApp on Android, a stack allocation failed to properly account for the amount of data being passed in. An off-by-one error meant that data was written beyond the allocated space on the stack. This issue affects WhatsApp for Android starting in version 2.18.180 and was fixed in version 2.18.295. It also affects WhatsApp Business for Android starting in version v2.18.103 and was fixed in version v2.18.150.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.facebook.com/security/advisories/cve-2018-6339/ Third Party Advisory
https://www.facebook.com/security/advisories/cve-2018-6339/ Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-6339), CISA KEV, FIRST EPSS (scores of 2026-10-18). This page is refreshed as NVD updates the record.