CVE-2026-5778
Integer underflow leads to out-of-bounds access in sniffer ChaCha decrypt path.
- State
- Published
- Severity
- 2.1 Low
- Published
- Apr 9, 2026
- Updated
- Apr 10, 2026
- Reserved
- Apr 8, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 2.1 Low | CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N | wolfSSL |
Weaknesses
- CWE-191 Integer underflow (wrap or wraparound)
Affected Products
| Product | Versions |
|---|---|
wolfSSLwolfSSL |
|
References
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