CVE-2022-2503

Linux Kernel LoadPin bypass via dm-verity table reload

Published Aug 12, 2022 CVSS 3.1 · 6.9 Medium EPSS < 1% KEV · Not listed
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

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Ubuntu USN Ubuntu USN USN-5594-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5599-1 Linux kernel (Oracle) vulnerabilities
Ubuntu USN Ubuntu USN USN-5602-1 Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN Ubuntu USN USN-5616-1 Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN Ubuntu USN USN-5622-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-5623-1 Linux kernel (HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-5630-1 Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN Ubuntu USN USN-5639-1 Linux kernel (Azure CVM) vulnerabilities
Ubuntu USN Ubuntu USN USN-5647-1 Linux kernel (GCP) vulnerabilities
Ubuntu USN Ubuntu USN USN-5654-1 Linux kernel (GKE) vulnerabilities
Ubuntu USN Ubuntu USN USN-5660-1 Linux kernel (GCP) vulnerabilities
Ubuntu USN Ubuntu USN USN-6001-1 Linux kernel (AWS) vulnerabilities
Ubuntu USN Ubuntu USN USN-6013-1 Linux kernel (AWS) vulnerabilities
Ubuntu USN Ubuntu USN USN-6014-1 Linux kernel vulnerabilities
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Google
Published
Updated
Oct 14, 2026, 1:07 PM
Reserved
Jul 21, 2022, 12:00 AM
Status
Modified
Published
Aug 12, 2022, 11:15 AM
Modified
Oct 14, 2026, 1:17 PM
Severity
Moderate
Public date
Aug 12, 2022, 12:00 AM