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).
Metrics
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References
History
Thu, 25 Jun 2026 20:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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). | |
| Title | Out-of-bounds heap read in SM2/SM3 certificate Subject Key Identifier computation | |
| Weaknesses | CWE-125 | |
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cvssV4_0
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MITRE
Status: PUBLISHED
Assigner: wolfSSL
Published:
Updated: 2026-06-25T19:36:21.468Z
Reserved: 2026-06-15T16:30:26.001Z
Link: CVE-2026-12340
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
Updated: 2026-06-25T21:30:11Z