CVE-2026-22698
- Source
- https://cve.org/CVERecord?id=CVE-2026-22698
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-22698.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-22698
- Aliases
- Published
- 2026-01-10T05:17:19Z
- Modified
- 2026-10-21T02:52:30Z
- Severity
-
- 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
- Summary
- RustCrypto SM2-PKE has 32-bit Biased Nonce Vulnerability
- Details
-
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.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-331" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22698.json" }- References
-
- https://crates.io/crates/sm2/0.14.0-pre.0
- https://crates.io/crates/sm2/0.14.0-rc.0
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22698.json
- https://github.com/RustCrypto/elliptic-curves/security/advisories/GHSA-w3g8-fp6j-wvqw
- https://nvd.nist.gov/vuln/detail/CVE-2026-22698
- https://github.com/RustCrypto/elliptic-curves/commit/4781762f23ff22ab34763410f648128055c93731
- https://github.com/RustCrypto/elliptic-curves/commit/e4f77788130d065d760e57fb109370827110a525
- https://github.com/RustCrypto/elliptic-curves/pull/1600
Affected packages
Git / github.com/rustcrypto/elliptic-curves
Affected ranges
- Type
- GIT
- Repo
- https://github.com/rustcrypto/elliptic-curves
- Events
- Database specific
-
Show details
{ "extracted_events": [ { "range": [ { "introduced": "= 0.14.0-pre.0" }, { "last_affected": "= 0.14.0-pre.0" } ], "source": "AFFECTED_FIELD", "strategy": "StandaloneSingleVersion" }, { "range": [ { "introduced": "= 0.14.0-rc.0" }, { "last_affected": "= 0.14.0-rc.0" } ], "source": "AFFECTED_FIELD", "strategy": "StandaloneSingleVersion" }, { "range": [ { "fixed": "4781762f23ff22ab34763410f648128055c93731" } ], "source": "REFERENCES_COMMIT" }, { "range": [ { "fixed": "e4f77788130d065d760e57fb109370827110a525" } ], "source": "REFERENCES_COMMIT" } ] }