The ECDSA signature implementation in ecdsa.c in Arm Mbed Crypto 2.1 and Mbed TLS through…
Priority LOW 22CWE-203Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- 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-203.
Summary
The ECDSA signature implementation in ecdsa.c in Arm Mbed Crypto 2.1 and Mbed TLS through 2.19.1 does not reduce the blinded scalar before computing the inverse, which allows a local attacker to recover the private key via side-channel attacks.
Why it matters now
EPSS 0.0034 27th percentileScored 2026-11-07
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 · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:arm:mbed_crypto:*:*:*:*:*:*:*:* | before 3.0.0 | Vulnerable | Arm |
| cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* | before 2.7.13; 2.8.0 to before 2.16.4; 2.17.0 to before 2.20.0 | Vulnerable | Arm |
| cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* | 30 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* | 31 | Vulnerable | Fedoraproject |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
- cpe:2.3:a:arm:mbed_crypto:*:*:*:*:*:*:*:* Versions before 3.0.0 Vulnerable ·Arm
- cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* Versions before 2.7.13; 2.8.0 to before 2.16.4; 2.17.0 to before 2.20.0 Vulnerable ·Arm
- cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* Versions 30 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-18222
- 2026-10-03 Alias added: GHSA-fpgh-hvp5-cqc2
References
Sources
- CVE-2019-18222 · CVE Program
- CVE-2019-18222 · NVD
- FIRST EPSS
- GHSA-fpgh-hvp5-cqc2 · GitHub Advisory Database · CC BY 4.0
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