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    Zephyr RTOS vulnerability risks nonce reuse in encrypted storage●CVE-2026-15890 Zephyr: unsynchronized static nonce counter in the ITS AEAD transform. Concurrent writes can reuse an AESMmastodonTechnologyCybersecurity020 h ago

    A new vulnerability, CVE-2026-15890, has been disclosed in the Zephyr operating system's ITS AEAD transform. The static nonce counter is not synchronized, so concurrent writes can reuse an AES-GCM or ChaCha20-Poly1305 nonce, potentially compromising data integrity. The flaw carries a CVSS score of 5.3, and a patch is reportedly under review.