In Mbed TLS before 2.28.0 and 3.x before 3.1.0, psa_cipher_generate_iv and…
Priority LOW 35CWE-327Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- 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-327.
Summary
In Mbed TLS before 2.28.0 and 3.x before 3.1.0, psa_cipher_generate_iv and psa_cipher_encrypt allow policy bypass or oracle-based decryption when the output buffer is at memory locations accessible to an untrusted application.
Why it matters now
EPSS 0.01226 69th percentileScored 2026-11-08
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 · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:* | 2.22.0 to before 2.28.0 | Vulnerable | OP-TEE |
| cpe:2.3:a:trustedfirmware:mbed_tls:3.0.0:*:*:*:*:*:*:* | 3.0.0 | 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:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:* Versions 2.22.0 to before 2.28.0 Vulnerable ·OP-TEE
- cpe:2.3:a:trustedfirmware:mbed_tls:3.0.0:*:*:*:*:*:*:* Versions 3.0.0 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-2021-45450
- 2026-10-03 Alias added: GHSA-97vf-2gx4-2rfm
References
Sources
- CVE-2021-45450 · CVE Program
- CVE-2021-45450 · NVD
- FIRST EPSS
- GHSA-97vf-2gx4-2rfm · GitHub Advisory Database · CC BY 4.0
- CVE-2021-45450 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences