CVE-2026-12340

CVE-2026-12340 · Out-of-bounds heap read in SM2/SM3 certificate Subject Key Identifier computation

Cette page présente des faits issus de sources publiques. Consultez l’avis original avant toute mise à jour.

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).

CVSS 6.3 · Moyenne · EPSS 0,3%

Publication

2026-06-25T19:36:21.468Z

Mise à jour

2026-06-26T13:59:21.953Z

Pile logicielle: system

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