CVE-2026-93475
CVE-2026-93475 · Out-of-bounds Write via an Unbounded RSA Modulus in NetX Secure X.509
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The X.509 parser in NetX Secure accepts an RSA public key of any size, but every signature-verification path decrypts into fixed-size buffers dimensioned for the `NX_CRYPTO_MAX_RSA_MODULUS_SIZE` default of 4096 bits. A certificate carrying a larger modulus drives an out-of-bounds write past a file-scope static during ordinary certificate-chain verification. It is reachable pre-authentication. The issuer used for the crypto operation is looked up in the remote, peer-supplied store before the trusted store, so the attacker supplies the oversized key themselves as an intermediate in the chain they present. It triggers on a TLS or DTLS client verifying a malicious server's chain, and on a server performing client-certificate authentication.
CVSS 9.3 · Critique · EPSS 0,2% · Correctif disponible
- Publication
- Mise à jour
Produits et versions concernés
eclipse threadx - netx duo
- Versions du logiciel
- ≥ 0, ≤ 6.5.1.202602: Concernée (semver)
- 6.5.2.202603: Non concernée
Mettez à jour vers 6.5.2.202603