CVE-2026-22700
RustCrypto Has Insufficient Length Validation in decrypt() in SM2-PKE
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
- RustCrypto · elliptic-curves
- CVSS v3.1 GITHUB
- 7.5 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.31% chance of exploitation in the next 30 days, 23rd percentile
- Published
- 2026-01-10
- Updated
- 2026-01-12
Proof-of-concept exploits (1)
Security advisories
- RustCrypto/elliptic-curves/security/advisories/GHSA-j9xq-69pf-pcm8
- RustCrypto/elliptic-curves/pull/1603