Vulnerability · Published Jan 10, 2026 · Assigned by GitHub_M
CVE-2026-22700RustCrypto Has Insufficient Length Validation in decrypt() in SM2-PKE
High 7.5
In plain English
A high-severity improper input validation in elliptic-curves from RustCrypto. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 24% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| RustCrypto | elliptic-curves | = 0.14.0-pre.0= 0.14.0-rc.0 |
Weakness: CWE-20 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H