Vulnerability Report

CVE-2026-22699

Title: DoS via Panics in RustCrypto: Elliptic Curves SM2 PKE Decrypt

Input Validation Error

Proof Of Concept

No public PoC currently indexed for CVE-2026-22699.

CWE Category CWE-20

Published Date Jan 10, 2026

Modified Date Jan 22, 2026

Exploit Status Not Found

Score 7.5 CVSS v3.1

Exploit Probability (EPSS)

0.37%

Vulnerability Summary

CVE-2026-22699: 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.

Impacted Vendors

rustcrypto 1

Reference Links

https://github.com/RustCrypto/elliptic-curves/commit/085b7bee647029bd189e1375203418205006bcab https://github.com/RustCrypto/elliptic-curves/pull/1602 https://github.com/RustCrypto/elliptic-curves/security/advisories/GHSA-78p6-6878-8mj6

CVSS v3.1

Source Entity [email protected]

Severity HIGH

7.5

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Associated Attack Patterns (CAPEC)

Total: Patterns