CVE-2026-1005CWE-191

Integer underflow leads to out-of-bounds access in sniffer AES-GCM/CCM/ARIA-GCM decrypt path

Low · published March 19, 2026

CVSS v4.0
2.1
EPSS
0%
Percentile
16.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
2.1 · LOW
Vector
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
EPSS
0.00255 · 16.2th percentile
Weakness
CWE-191 · Integer Underflow (Wrap or Wraparound)
Published
2026-03-19T17:00Z
EPSS history
Timeline
  • 19 MAR 17:00Z
    Integer underflow leads to out-of-bounds access in sniffer AES-GCM/CCM/ARIA-GCM decrypt path
    cvelistv5