Improper certificate validation in Arm mbed TLS
Priority MEDIUM 41CWE-295Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Spoofing
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · CNA. Fix status from CNA. Impact type from CWE-295.
Summary
An exploitable free of a stack pointer vulnerability exists in the x509 certificate parsing code of ARM mbed TLS before 1.3.19, 2.x before 2.1.7, and 2.4.x before 2.4.2. A specially crafted x509 certificate, when parsed by mbed TLS library, can cause an invalid free of a stack pointer leading to a potential remote code execution. In order to exploit this vulnerability, an attacker can act as either a client or a server on a network to deliver malicious x509 certificates to vulnerable applications.
Why it matters now
EPSS 0.0339 88th 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 |
|---|---|---|---|---|---|
| Arm | mbed TLS | 2.4.0 | — | No fix listed | CNA |
- mbed TLS VendorArm Affected 2.4.0 Fixed in — No fix listed CNA
CPE configurations NVD · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:* | up to 1.3.18 | Vulnerable | OP-TEE |
| cpe:2.3:a:trustedfirmware:mbed_tls:2.0.0:*:*:*:*:*:*:* | 2.0.0 | Vulnerable | OP-TEE |
| cpe:2.3:a:trustedfirmware:mbed_tls:2.1.0:*:*:*:*:*:*:* | 2.1.0 | Vulnerable | OP-TEE |
| cpe:2.3:a:trustedfirmware:mbed_tls:2.1.1:*:*:*:*:*:*:* | 2.1.1 | Vulnerable | OP-TEE |
| cpe:2.3:a:trustedfirmware:mbed_tls:2.1.2:*:*:*:*:*:*:* | 2.1.2 | Vulnerable | OP-TEE |
| cpe:2.3:a:trustedfirmware:mbed_tls:2.1.3:*:*:*:*:*:*:* | 2.1.3 | Vulnerable | OP-TEE |
| cpe:2.3:a:trustedfirmware:mbed_tls:2.1.4:*:*:*:*:*:*:* | 2.1.4 | Vulnerable | OP-TEE |
| cpe:2.3:a:trustedfirmware:mbed_tls:2.1.5:*:*:*:*:*:*:* | 2.1.5 | Vulnerable | OP-TEE |
| cpe:2.3:a:trustedfirmware:mbed_tls:2.1.6:*:*:*:*:*:*:* | 2.1.6 | Vulnerable | OP-TEE |
| cpe:2.3:a:trustedfirmware:mbed_tls:2.4.0:*:*:*:*:*:*:* | 2.4.0 | Vulnerable | OP-TEE |
- cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:* Versions up to 1.3.18 Vulnerable ·OP-TEE
- cpe:2.3:a:trustedfirmware:mbed_tls:2.0.0:*:*:*:*:*:*:* Versions 2.0.0 Vulnerable ·OP-TEE
- cpe:2.3:a:trustedfirmware:mbed_tls:2.1.0:*:*:*:*:*:*:* Versions 2.1.0 Vulnerable ·OP-TEE
- cpe:2.3:a:trustedfirmware:mbed_tls:2.1.1:*:*:*:*:*:*:* Versions 2.1.1 Vulnerable ·OP-TEE
- cpe:2.3:a:trustedfirmware:mbed_tls:2.1.2:*:*:*:*:*:*:* Versions 2.1.2 Vulnerable ·OP-TEE
- cpe:2.3:a:trustedfirmware:mbed_tls:2.1.3:*:*:*:*:*:*:* Versions 2.1.3 Vulnerable ·OP-TEE
- cpe:2.3:a:trustedfirmware:mbed_tls:2.1.4:*:*:*:*:*:*:* Versions 2.1.4 Vulnerable ·OP-TEE
- cpe:2.3:a:trustedfirmware:mbed_tls:2.1.5:*:*:*:*:*:*:* Versions 2.1.5 Vulnerable ·OP-TEE
- cpe:2.3:a:trustedfirmware:mbed_tls:2.1.6:*:*:*:*:*:*:* Versions 2.1.6 Vulnerable ·OP-TEE
- cpe:2.3:a:trustedfirmware:mbed_tls:2.4.0:*:*:*:*:*:*:* Versions 2.4.0 Vulnerable ·OP-TEE
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2017-2784
- 2026-10-03 Alias added: GHSA-5wj7-rhf5-hqx4
References
More Arm vulnerabilities
- TI-2022-17875 The Arm Mali GPU kernel driver allows unprivileged users to access freed memory because… KEVCVSS 3.1HIGH 8.8
- TI-2021-10068 . KEVCVSS 3.1HIGH 8.8
- TI-2021-09732 The Arm Mali GPU kernel driver allows privilege escalation or a denial of service (memory… KEVCVSS 3.1HIGH 8.8
- TI-2021-09731 The Arm Mali GPU kernel driver allows privilege escalation or information disclosure… KEVCVSS 3.1HIGH 8.8
- TI-2024-04292 Mali GPU Kernel Driver allows improper GPU memory processing operations KEVCVSS 3.1HIGH 7.8
- TI-2022-06958 Arm Mali GPU Kernel Driver allows a non-privileged user to achieve write access to… KEVCVSS 3.1HIGH 7.8
Sources
- CVE-2017-2784 · CVE Program
- CVE-2017-2784 · NVD
- FIRST EPSS
- GHSA-5wj7-rhf5-hqx4 · GitHub Advisory Database · CC BY 4.0
- CVE-2017-2784 · Red Hat security data · CC BY 4.0
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