CVE-2026-5778 — Integer underflow leads to out-of-bounds access in sniffer ChaCha decrypt path.
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 …
Published: 2026-04-09 · CVSS: 2.1 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7