CVE-2026-5446CWE-323

wolfSSL ARIA-GCM TLS 1.2/DTLS 1.2 GCM nonce reuse

Medium · published April 9, 2026

CVSS v4.0
6.0
EPSS
0%
Percentile
21.8
In the wild
Unconfirmed
What it is

In wolfSSL, ARIA-GCM cipher suites used in TLS 1.2 and DTLS 1.2 reuse an identical 12-byte GCM nonce for every application-data record. Because wc_AriaEncrypt is stateless and passes the caller-supplied IV verbatim to the MagicCrypto SDK with no internal counter, and because the explicit IV is zero-initialized at session setup and never incremented in non-FIPS builds. This vulnerability affects wolfSSL builds configured with --enable-aria and the proprietary MagicCrypto SDK (a non-default, opt-in configuration required for Korean regulatory deployments). AES-GCM is not affected because wc_AesGcmEncrypt_ex maintains an internal invocation counter independently of the call-site guard.

The record
Technical detail
CVSS v4.0
6.0 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00303 · 21.8th percentile
Weakness
CWE-323 · Reusing a Nonce, Key Pair in Encryption
Published
2026-04-09T21:02Z
EPSS history
Timeline
  • 09 APR 21:02Z
    wolfSSL ARIA-GCM TLS 1.2/DTLS 1.2 GCM nonce reuse
    cvelistv5