CVE Tools
Sign in

CVE-2022-2503

Linux Kernel LoadPin bypass via dm-verity table reload

Published: Aug 12, 2022Updated: Nov 21, 2024 Sources: CVE List NVD BDU csafCWE-302
NVD MITRE
6.9CVSSMEDIUM
EPSS Score
0.4%
Top 73.3%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

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 Vector Breakdown

AV:LAC:HPR:HUI:RS:CC:HI:HA:N
Exploitability
AV:LAttack Vector
Local
AC:HAttack Complexity
High
PR:HPrivileges Required
High
UI:RUser Interaction
Required
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-302CWE-287

Affected Products

linux kernellinux
On-premOS
Operating Systems
Astra Linux Special EditionООО «РусБИТех-Астра»
On-premOS
Operating Systems / linux-distro
ОСОН ОСнова ОnyxАО «НППКТ»
On-premOS
Operating Systems / linux-distro
LinuxСообщество свободного программного обеспечения
On-premOS
Operating Systems / linux-distro
Linux KernelLinux Kernel
On-prem
Operating Systems / linux-distro
linuxoss-projectOperating Systemsaka the linux kernel
ооо «русбитех-астра»commercialRUOperating Systemsaka rusbitech-astra
ао «нппкт»commercialRUOperating Systems
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
linux kerneloss-projectOperating Systemsaka linux, linux-kernel

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available
Workaround Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://github.com/google/security-research/security/advisories/GHSA-6vq3-w69p-w63m
github.com
https://security.netapp.com/advisory/ntap-20230214-0005/
security.netapp.com
https://cert-portal.siemens.com/productcert/csaf/ssa-794697.json
cert-portal.siemens.com
and 26 more references View all →

Timeline

Published
Aug 12, 2022
Last Updated
Nov 21, 2024

Unlock Complete Vulnerability Intelligence

Get the full picture for CVE-2022-2503 and every CVE in our database. Create a free account — no credit card required.

Create Free Account
Plain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows