CVE-2023-49721

An insecure default to allow UEFI Shell in EDK2 was left enabled in LXD. This allows an OS-resident attacker to bypass Secure Boot.

CVSS v3 6.7 MEDIUM

6.7^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 0.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137	Issue Tracking
https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/2040139	Issue Tracking
https://nvd.nist.gov/vuln/detail/CVE-2023-48733	Third Party Advisory
https://www.openwall.com/lists/oss-security/2024/02/14/4	Mailing List
https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137	Issue Tracking
https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/2040139	Issue Tracking
https://nvd.nist.gov/vuln/detail/CVE-2023-48733	Third Party Advisory
https://www.openwall.com/lists/oss-security/2024/02/14/4	Mailing List

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:canonical:lxd::::::::
	cpe:2.3:a:tianocore:edk2::-::::::*

History

26 Aug 2025, 17:19

Type	Values Removed	Values Added
References	~~() https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137 -~~	() https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137 - Issue Tracking
References	~~() https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/2040139 -~~	() https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/2040139 - Issue Tracking
References	~~() https://nvd.nist.gov/vuln/detail/CVE-2023-48733 -~~	() https://nvd.nist.gov/vuln/detail/CVE-2023-48733 - Third Party Advisory
References	~~() https://www.openwall.com/lists/oss-security/2024/02/14/4 -~~	() https://www.openwall.com/lists/oss-security/2024/02/14/4 - Mailing List
CPE		cpe:2.3:a:canonical:lxd:::::::: cpe:2.3:a:tianocore:edk2::-::::::*
First Time		Canonical Tianocore Tianocore edk2 Canonical lxd

Information

Published : 2024-02-14 22:15

Updated : 2025-08-26 17:19

NVD link : CVE-2023-49721

Mitre link : CVE-2023-49721

CVE.ORG link : CVE-2023-49721

JSON object : View

Products Affected

canonical

lxd

tianocore

edk2

CWE

CWE-276

Incorrect Default Permissions

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