CVE-2026-5778 — Integer underflow leads to out-of-bounds access in sniffer ChaCha decrypt path.

CVE-2026-5778

Integer underflow leads to out-of-bounds access in sniffer ChaCha decrypt path. PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
wolfSSL / wolfSSL	affected 0 through 5.9.0

CWE

CWE-191

References

https://github.com/wolfSSL/wolfssl/pull/10125

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.