An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0.
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- High
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-203.
Summary
An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. An adversary with access to precise enough information about memory accesses (typically, an untrusted operating system attacking a secure enclave) can recover an RSA private key after observing the victim performing a single private-key operation, if the window size (MBEDTLS_MPI_WINDOW_SIZE) used for the exponentiation is 3 or smaller.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
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 · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* | before 2.28.2 | Vulnerable | Arm |
| cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:* | 3.0.0 to before 3.3.0 | Vulnerable | OP-TEE |
| cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* | 36 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* | 37 | Vulnerable | Fedoraproject |
- cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* Versions before 2.28.2 Vulnerable ·Arm
- cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:* Versions 3.0.0 to before 3.3.0 Vulnerable ·OP-TEE
- cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* Versions 36 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* Versions 37 Vulnerable ·Fedoraproject
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2022-46392
- 2026-10-03 Alias added: GHSA-2cww-m3rc-2vgr
References
Sources
- CVE-2022-46392 · CVE Program
- CVE-2022-46392 · NVD
- FIRST EPSS
- GHSA-2cww-m3rc-2vgr · GitHub Advisory Database · CC BY 4.0
- CVE-2022-46392 · Red Hat security data · CC BY 4.0
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