CVE-2026-5446 PUBLISHED

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

Assigner: wolfSSL
Reserved: 02.04.2026 Published: 09.04.2026 Updated: 09.04.2026

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.

Metrics

CVSS 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
CVSS Score: 6

Product Status

Vendor wolfSSL
Product wolfSSL
Versions Default: unaffected
  • affected from 5.2.1 to 5.9.1 (excl.)

Credits

  • Calif.io in collaboration with Claude and Anthropic Research finder

References

Problem Types

  • CWE-323 Reusing a Nonce, Key Pair in Encryption CWE