CVEvulnerability

CVE-2026-81019

7.4 HIGH Published 2026-08-28 Modified 2026-09-29 Official page ↗
Status
Analyzed
Published
2026-08-28
Last modified
2026-09-29
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.4 HIGH — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Weaknesses
CWE-323

Description

wolfProvider before 1.2.2 generates the 8-byte explicit AES-GCM nonce once when the TLS write key is set and never increments it per record. As a result every TLS 1.2 and DTLS 1.2 AES-GCM record within a connection is encrypted under an identical key and nonce pair. Reusing a GCM key and nonce discloses the keystream (the XOR of two ciphertexts equals the XOR of their plaintexts, so one known record recovers the others) and leaks the GHASH authentication key, enabling authentication tag forgery. AES-CCM, TLS 1.3, and non-TLS use of the cipher are not affected.

Affected configurations

• wolfssl wolfprovider (< 1.2.2)

Related

Weakness · CWE (1)

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

References