CVE-2022-2503 (GCVE-0-2022-2503)

Vulnerability from cvelistv5 – Published: 2022-08-12 00:00 – Updated: 2025-04-21 13:50
VLAI?
Title
Linux Kernel LoadPin bypass via dm-verity table reload
Summary
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
Severity ?
6.9 (Medium)
CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
CWE
  • CWE-302 - Authentication Bypass by Assumed-Immutable Data
Assigner
References
Impacted products
Vendor Product Version
Linux Kernel Linux Kernel Affected: unspecified , < 4caae58406f8ceb741603eee460d79bacca9b1b5 (custom)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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