CVE-2026-22699— RustCrypto SM2-PKE has Unchecked AffinePoint Decoding (unwrap) in decrypt()
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I. Basic Information for CVE-2026-22699
Vulnerability Information
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Vulnerability Title
RustCrypto SM2-PKE has Unchecked AffinePoint Decoding (unwrap) in decrypt()
Source: NVD (National Vulnerability Database)
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 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
RustCrypto: Elliptic Curves 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
RustCrypto: Elliptic Curves是Rust Crypto开源的一个Rust加密库。 RustCrypto: Elliptic Curves 0.14.0-pre.0版本和0.14.0-rc.0版本存在输入验证错误漏洞，该漏洞源于SM2 PKE解密路径中未检查无效椭圆曲线点，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| RustCrypto | elliptic-curves | = 0.14.0-pre.0 | - |
II. Public POCs for CVE-2026-22699
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · RustCrypto · 2026-01-10 · 4 CVEs total
| CVE-2026-22700 | 7.5 HIGH | RustCrypto Has Insufficient Length Validation in decrypt() in SM2-PKE |
| CVE-2026-22705 | 6.4 MEDIUM | RustCrypto: Signatures has timing side-channel in ML-DSA decomposition |
| CVE-2026-22698 | RustCrypto SM2-PKE has 32-bit Biased Nonce Vulnerability |
IV. Related Vulnerabilities
Same vendor: RustCrypto
- CVE-2026-24850
ML-DSA Signature Verification Accepts Signatures with Repeat - CVE-2026-23519
RustCrypto cmov: thumbv6m-none-eabi compiler emits non-const - CVE-2026-22705
RustCrypto: Signatures has timing side-channel in ML-DSA dec - CVE-2026-22700
RustCrypto Has Insufficient Length Validation in decrypt() i - CVE-2026-22698
RustCrypto SM2-PKE has 32-bit Biased Nonce Vulnerability
Same weakness: CWE-20
V. Comments for CVE-2026-22699
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