PatchTheCVECVE-2019-14239: On NXP Kinetis KV1x, Kinetis KV3x, and Kinetis K8x devices, Flash Access Controls (FAC) (a software IP protect
CVE-2019-14239 is a medium-severity flaw (CVSS 6.6) affecting kinetis kv1x firmware, kinetis kv3x firmware, kinetis k8x firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
On NXP Kinetis KV1x, Kinetis KV3x, and Kinetis K8x devices, Flash Access Controls (FAC) (a software IP protection method for execute-only access) can be defeated by leveraging a load instruction inside the execute-only region to expose the protected code into a CPU register.
Why this priority
- Public exploit reference
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 6.6 (Medium) |
| Attack vector | Physical |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.4% (top 66%) |
| CISA exploited list | No |
| Weakness | CWE-287 |
| Published | 2019-09-24 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2019-14239?
kinetis kv1x firmware: mitigate or apply the listed mitigation; kinetis kv3x firmware: mitigate or apply the listed mitigation; kinetis k8x firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2019-14239 being exploited?
CVE-2019-14239 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2019-14239 affect?
CVE-2019-14239 affects kinetis kv1x firmware, kinetis kv3x firmware, kinetis k8x firmware. Severity is medium (CVSS 6.6). On NXP Kinetis KV1x, Kinetis KV3x, and Kinetis K8x devices, Flash Access Controls (FAC) (a software IP protection method for execute-only access) can be defeated by leveraging a load instruction inside the execute-only region to expose the
How urgent is CVE-2019-14239?
Priority 37/100. Public exploit reference
Related CVEs
- CVE-2019-14237 CRITICAL 9.8 MITIGATE MITIGATE On NXP Kinetis KV1x, Kinetis KV3x, and Kinetis K8x devices, Flash Access Controls (FAC) (a software IP protect