Vulnerability Description
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 public-key encryption (PKE) implementation: the decrypt() path performs unchecked slice::split_at operations on input buffers derived from untrusted ciphertext. An attacker can submit short/undersized ciphertext or carefully-crafted DER-encoded structures to trigger bounds-check panics (Rust unwinding) which crash the calling thread or process. This issue has been patched via commit e60e991.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Rustcrypto | Sm2 Elliptic Curve | 0.14.0 |
Related Weaknesses (CWE)
References
- https://github.com/RustCrypto/elliptic-curves/commit/e60e99167a9a2b187ebe80c994cPatch
- https://github.com/RustCrypto/elliptic-curves/pull/1603Patch
- https://github.com/RustCrypto/elliptic-curves/security/advisories/GHSA-j9xq-69pfExploitVendor Advisory
- https://github.com/RustCrypto/elliptic-curves/security/advisories/GHSA-j9xq-69pfExploitVendor Advisory
FAQ
What is CVE-2026-22700?
CVE-2026-22700 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 k...
How severe is CVE-2026-22700?
CVE-2026-22700 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-22700?
Check the references section above for vendor advisories and patch information. Affected products include: Rustcrypto Sm2 Elliptic Curve.