Vulnerability Description
Dm-verity is used for extending root-of-trust to root filesystems. LoadPin builds on this property to restrict module/firmware loads to just the trusted root filesystem. Device-mapper table reloads currently allow users with root privileges to switch out the target with an equivalent dm-linear target and bypass verification till reboot. This allows root to bypass LoadPin and can be used to load untrusted and unverified kernel modules and firmware, which implies arbitrary kernel execution and persistence for peripherals that do not verify firmware updates. We recommend upgrading past commit 4caae58406f8ceb741603eee460d79bacca9b1b5
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.19 |
Related Weaknesses (CWE)
References
- https://github.com/google/security-research/security/advisories/GHSA-6vq3-w69p-wExploitPatchThird Party Advisory
- https://security.netapp.com/advisory/ntap-20230214-0005/
- https://github.com/google/security-research/security/advisories/GHSA-6vq3-w69p-wExploitPatchThird Party Advisory
- https://security.netapp.com/advisory/ntap-20230214-0005/
FAQ
What is CVE-2022-2503?
CVE-2022-2503 is a vulnerability with a CVSS score of 6.9 (MEDIUM). Dm-verity is used for extending root-of-trust to root filesystems. LoadPin builds on this property to restrict module/firmware loads to just the trusted root filesystem. Device-mapper table reloads cu...
How severe is CVE-2022-2503?
CVE-2022-2503 has been rated MEDIUM with a CVSS base score of 6.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-2503?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.