01 Record
CVE-2026-22698
RustCrypto SM2-PKE has 32-bit Biased Nonce Vulnerability
HighPUBLISHEDCNA: GitHub_M
CNA base score8.7 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
02 Description
RustCrypto SM2-PKE has 32-bit Biased Nonce Vulnerability
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.27% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 19.6% of scored records. A rank, not a probability.
- NVD base score
- 8.7 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- NVD analysis status
- Analyzed. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-01-10 05:17Z9 MO AGO
- Last updated
- 2026-01-12 16:48Z9 MO AGO
- Reserved
- 2026-01-08
- Assigning CNA
- GitHub_M
- Record state
- PUBLISHED
- Severity
- High (CVSS 8.7)
- CNA CVSS vector
- 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
- Weaknesses
- CWE-331Insufficient EntropyBase
- Data version
- 5.2
- Document digest
- 04965d1e561a288699c05ebd4d3acbfc1fdad8580248a43c1e29566c641f4982
05 Affected products
VendorProductVersionsPlatforms
06 References
- github.comhttps://github.com/RustCrypto/elliptic-curves/security/advisories/GHSA-w3g8-fp6j-wvqw
- github.comhttps://github.com/RustCrypto/elliptic-curves/pull/1600
- github.comhttps://github.com/RustCrypto/elliptic-curves/commit/4781762f23ff22ab34763410f648128055c93731
- github.comhttps://github.com/RustCrypto/elliptic-curves/commit/e4f77788130d065d760e57fb109370827110a525
- crates.iohttps://crates.io/crates/sm2/0.14.0-pre.0
- crates.iohttps://crates.io/crates/sm2/0.14.0-rc.0