Mbed TLS before 3.0.1 has a double free in certain out-of-memory conditions, as…
Priority MEDIUM 47CWE-415Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-415 and the CVSS impact.
Summary
Mbed TLS before 3.0.1 has a double free in certain out-of-memory conditions, as demonstrated by an mbedtls_ssl_set_session() failure.
Why it matters now
EPSS 0.0277 86th 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 · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* | before 2.16.12; 2.17.0 to before 2.28.0 | Vulnerable | Arm |
| cpe:2.3:a:trustedfirmware:mbed_tls:3.0.0:-:*:*:*:*:*:* | 3.0.0 | Vulnerable | OP-TEE |
| cpe:2.3:a:trustedfirmware:mbed_tls:3.0.0:preview1:*:*:*:*:*:* | 3.0.0 preview1 | Vulnerable | OP-TEE |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
- cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:* Versions before 2.16.12; 2.17.0 to before 2.28.0 Vulnerable ·Arm
- cpe:2.3:a:trustedfirmware:mbed_tls:3.0.0:-:*:*:*:*:*:* Versions 3.0.0 Vulnerable ·OP-TEE
- cpe:2.3:a:trustedfirmware:mbed_tls:3.0.0:preview1:*:*:*:*:*:* Versions 3.0.0 preview1 Vulnerable ·OP-TEE
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2021-44732
- 2026-10-03 Alias added: GHSA-7g56-f7p4-fmcq
References
Advisory 2
Sources
- CVE-2021-44732 · CVE Program
- CVE-2021-44732 · NVD
- FIRST EPSS
- GHSA-7g56-f7p4-fmcq · GitHub Advisory Database · CC BY 4.0
- CVE-2021-44732 · 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