CVE-2026-22698

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 critical vulnerability exists in the SM2 Public Key Encryption (PKE) implementation where the ephemeral nonce k is generated with severely reduced entropy. A unit mismatch error causes the nonce generation function to request only 32 bits of randomness instead of the expected 256 bits. This reduces the security of the encryption from a 128-bit level to a trivial 16-bit level, allowing a practical attack to recover the nonce k and decrypt any ciphertext given only the public key and ciphertext. This issue has been patched via commit e4f7778.

Affected packages

Related vulnerabilities

• GHSA-w3g8-fp6j-wvqw SM2-PKE has 32-bit Biased Nonce Vulnerability Same vulnerability
• GHSA-j9xq-69pf-pcm8 RustCrypto Has Insufficient Length Validation in decrypt() in SM2-PKE Also affects sm2
• CVE-2026-22700 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
• CVE-2026-22699 SM2-PKE has Unchecked AffinePoint Decoding (unwrap) in decrypt() Also affects sm2
• CVE-2026-80171 Dell SCG 5.0 Appliance versions prior to 5.36.00.16 and Dell SCG 5.0 Application versions… CWE-331
• CVE-2026-62646 A vulnerability has been identified in Reyrolle 7SR5 (All versions < V2.70). CWE-331
• CVE-2026-4936 IBM PowerVM Hypervisor Platform KeyStore (PKS) and virtual TPM FW1110.00 through… CWE-331