CVE-2026-12340

Description

Out-of-bounds heap read during SM2/SM3 certificate signature verification. When parsing a certificate with an SM3wSM2 signature, the Subject Key Identifier computation reads the trailing 65 bytes of the public key without checking that the key is at least that long. A public key shorter than 65 bytes results in an out-of-bounds heap read, leading to a potential crash (denial of service); there is no out-of-bounds write. Note this only affects builds with SM2 support (--enable-sm2 or --enable-all).

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Produits concernés

• wolfSSL
• Wolfssl wolfssl

Scores CVSS

Faiblesses (CWE)

• CWE-125

Références

• https://github.com/wolfSSL/wolfssl/pull/10641 Issue TrackingPatch
• https://www.wolfssl.com/docs/security-vulnerabilities/ Vendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories