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CVE-2026-5778

MEDIUM CVSS: 6.5 Published: 2026-04-09 Modified: 2026-06-17

Description

Integer underflow in wolfSSL packet sniffer <= 5.9.0 allows an attacker to cause a program crash 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 a large out-of-bounds read and crash. An unauthenticated attacker can trigger this remotely via malformed TLS Application Data records.

Affected Platforms

Wolfssl Wolfssl

Weakness Type

CWE-191

References