Arbitrary Code execution via exposed JTAG port in Kioxia CM6, PM6, PM7
Key facts
- Attack vector
- Physical
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · High · None
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.
Summary
There exists an unauthenticated accessible JTAG port on the Kioxia PM6, PM7 and CM6 devices - On the Kioxia CM6, PM6 and PM7 disk drives it was discovered that the 2 main CPU cores of the SoC can be accessed via an open JTAG debug port that is exposed on the drive’s circuit board. Due to the wide cutout of the enclosures, the JTAG port can be accessed without having to open the disk enclosure. Utilizing the JTAG debug port, an attacker with (temporary) physical access can get full access to the firmware and memory on the 2 main CPU cores within the drive including the execution of arbitrary code, the modification of firmware execution flow and data or bypassing the firmware signature verification during boot-up.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
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 |
|---|---|---|---|---|---|
| Kioxia | CM6 | up to 1.66.1 | — | No fix listed | CNA |
| Kioxia | PM7 | all versions | — | No fix listed | CNA |
| Kioxia | PM6 | all versions | — | No fix listed | CNA |
- CM6 VendorKioxia Affected up to 1.66.1 Fixed in — No fix listed CNA
- PM7 VendorKioxia Affected all versions Fixed in — No fix listed CNA
- PM6 VendorKioxia Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:kioxia:cm6_firmware:*:*:*:*:*:*:*:* | up to gpk5 | Vulnerable | Kioxia |
| cpe:2.3:h:kioxia:cm6:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Kioxia |
| cpe:2.3:o:kioxia:pm7_firmware:*:*:*:*:*:*:*:* | up to c40a | Vulnerable | Kioxia |
| cpe:2.3:h:kioxia:pm7:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Kioxia |
| cpe:2.3:o:kioxia:pm6_firmware:*:*:*:*:*:*:*:* | up to bd0d | Vulnerable | Kioxia |
| cpe:2.3:h:kioxia:pm6:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Kioxia |
- cpe:2.3:o:kioxia:cm6_firmware:*:*:*:*:*:*:*:* Versions up to gpk5 Vulnerable ·Kioxia
- cpe:2.3:h:kioxia:cm6:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Kioxia
- cpe:2.3:o:kioxia:pm7_firmware:*:*:*:*:*:*:*:* Versions up to c40a Vulnerable ·Kioxia
- cpe:2.3:h:kioxia:pm7:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Kioxia
- cpe:2.3:o:kioxia:pm6_firmware:*:*:*:*:*:*:*:* Versions up to bd0d Vulnerable ·Kioxia
- cpe:2.3:h:kioxia:pm6:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Kioxia
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2024-7726
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences