The Elliptic Curve Cryptography library (aka sunec or libsunec) allows a memory-cache…
Priority LOW 23CWE-200Published · Updated
Key facts
- Attack vector
- Physical
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-200.
Summary
The Elliptic Curve Cryptography library (aka sunec or libsunec) allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.
Why it matters now
EPSS 0.00457 39th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:libsunec_project:libsunec:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Libsunec Project |
- cpe:2.3:a:libsunec_project:libsunec:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Libsunec Project
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-12438
- 2026-10-03 Alias added: GHSA-6xrq-423r-vrcg
References
Sources
- CVE-2018-12438 · CVE Program
- CVE-2018-12438 · NVD
- FIRST EPSS
- GHSA-6xrq-423r-vrcg · GitHub Advisory Database · CC BY 4.0
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