Sm2 Elliptic Curve
CVE-2026-22699
HIGH
GHSA-78p6-6878-8mj6
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
4DescriptionGitHub Advisory
RustCrypto: Elliptic Curves is general purpose Elliptic Curve Cryptography (ECC) support, including types and traits for representing various elliptic curve forms, scalars, points, and public/secret keys composed thereof. In versions 0.14.0-pre.0 and 0.14.0-rc.0, a denial-of-service vulnerability exists in the SM2 PKE decryption path where an invalid elliptic-curve point (C1) is decoded and the resulting value is unwrapped without checking. Specifically, AffinePoint::from_encoded_point(&encoded_c1) may return a None/CtOption::None when the supplied coordinates are syntactically valid but do not lie on the SM2 curve. The calling code previously used .unwrap(), causing a panic when presented with such input. This issue has been patched via commit 085b7be.
AnalysisAI
RustCrypto Elliptic Curves versions 0.14.0-pre.0 and 0.14.0-rc.0 are vulnerable to denial-of-service when decrypting SM2 public key encryption, as invalid curve points with syntactically valid coordinates cause an unhandled panic during point validation. Public exploit code exists for this vulnerability, affecting applications that use the SM2 implementation. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | RustCrypto Elliptic Curves library versions 0.14.0-pre.0 or 0.14.0-rc.0 with SM2 PKE decryption enabled; attacker must send syntactically valid but cryptographically invalid point coordinates to the decryption path. Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | CVSS 7.5 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker could exploit this vulnerability to compromise the affected system. |
| Remediation | A vendor patch is available — apply it immediately. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Within 7 days: Identify all affected systems and apply vendor patches promptly. …
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