CVE-2018-20655
Description
When receiving calls using WhatsApp for iOS, a missing size check when parsing a sender-provided packet allowed for a stack-based overflow. This issue affects WhatsApp for iOS prior to v2.18.90.24 and WhatsApp Business for iOS prior to v2.18.90.24.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Stack-based overflow in WhatsApp for iOS due to missing size check when parsing a sender-provided packet; fixed in v2.18.90.24.
Vulnerability
A missing size check when parsing a sender-provided packet during WhatsApp calls allows a stack-based buffer overflow. This affects WhatsApp for iOS prior to v2.18.90.24 and WhatsApp Business for iOS prior to v2.18.90.24 [1].
Exploitation
An attacker can send a crafted packet to a victim during a WhatsApp call. No authentication is required beyond initiating a call; the vulnerability is triggered when the receiver parses the malicious packet.
Impact
Successful exploitation could allow an attacker to achieve arbitrary code execution on the victim's device, potentially leading to full compromise of the WhatsApp application and device data.
Mitigation
Update to WhatsApp for iOS v2.18.90.24 or later, or WhatsApp Business for iOS v2.18.90.24 or later [1]. No workaround is available.
AI Insight generated on May 26, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.
Affected products
4- Range: <2.18.90.24
- Range: 2.18.90.24
- Range: 2.18.90.24
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
2- www.securityfocus.com/bid/108805mitrevdb-entryx_refsource_BID
- www.facebook.com/security/advisories/cve-2018-20655/mitrex_refsource_MISC
News mentions
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