CVE-2026-22700

The record

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 packages

Related vulnerabilities

• GHSA-j9xq-69pf-pcm8 RustCrypto Has Insufficient Length Validation in decrypt() in SM2-PKE Same vulnerability
• CVE-2026-22698 RustCrypto: Elliptic Curves is general purpose Elliptic Curve Cryptography (ECC) support… Also affects sm2
• GHSA-78p6-6878-8mj6 SM2-PKE has Unchecked AffinePoint Decoding (unwrap) in decrypt() Also affects sm2
• GHSA-w3g8-fp6j-wvqw SM2-PKE has 32-bit Biased Nonce Vulnerability Also affects sm2
• CVE-2026-22699 SM2-PKE has Unchecked AffinePoint Decoding (unwrap) in decrypt() Also affects sm2