Auth bypass in Kioxia Cm6
CVE-2024-7726
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.
Vulnerability class: Broken Authentication
EPSS: 0.004 (32.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Kioxia Cm6 — versions 0
- Kioxia Cm6_firmware
- Kioxia Pm6 — versions 0
- Kioxia Pm6_firmware
- Kioxia Pm7 — versions 0
- Kioxia Pm7_firmware
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve-coordination@google.com (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2024-7726?
- CVE-2024-7726 is a medium-severity vulnerability in Kioxia Cm6, classified under Missing Authentication for Critical Function. CVSS score: 6.8/10. Published 2024-12-20.
- How severe is CVE-2024-7726?
- Medium severity. CVSS v3 base score is 6.8 out of 10.
- Is CVE-2024-7726 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.