CVE-2026-1005

Integer underflow in wolfSSL packet sniffer <= 5.8.4 allows an attacker to cause a buffer overflow in the AEAD decryption path by injecting a TLS record shorter than the explicit IV plus authentication tag into traffic inspected by ssl_DecodePacket. The underflow wraps a 16-bit length to a large value that is passed to AEAD decryption routines, causing heap buffer overflow and a crash. An unauthenticated attacker can trigger this remotely via malformed TLS Application Data records.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://github.com/wolfSSL/wolfssl/pull/9571	Issue Tracking Patch

Configurations

Configuration 1 (hide)

cpe:2.3:a:wolfssl:wolfssl:*:*:*:*:*:*:*:*

History

29 Apr 2026, 18:48

Type	Values Removed	Values Added
CPE		cpe:2.3:a:wolfssl:wolfssl::::::::
References	~~() https://github.com/wolfSSL/wolfssl/pull/9571 -~~	() https://github.com/wolfSSL/wolfssl/pull/9571 - Issue Tracking, Patch
First Time		Wolfssl Wolfssl wolfssl
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.3
Summary		(es) Un desbordamiento negativo de enteros en el sniffer de paquetes wolfSSL <= 5.8.4 permite a un atacante causar un desbordamiento de búfer en la ruta de descifrado AEAD inyectando un registro TLS más corto que el IV explícito más la etiqueta de autenticación en el tráfico inspeccionado por ssl_DecodePacket. El desbordamiento negativo convierte una longitud de 16 bits en un valor grande que se pasa a las rutinas de descifrado AEAD, causando un desbordamiento de búfer en el heap y un fallo. Un atacante no autenticado puede activar esto de forma remota a través de registros de datos de aplicación TLS malformados.

19 Mar 2026, 17:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-03-19 17:16

Updated : 2026-04-29 18:48

NVD link : CVE-2026-1005

Mitre link : CVE-2026-1005

CVE.ORG link : CVE-2026-1005

JSON object : View

Products Affected

wolfssl

wolfssl

CWE

CWE-191

Integer Underflow (Wrap or Wraparound)

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