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CVE-2023-49721

Published: Feb 14, 2024Updated: Aug 26, 2025 Sources: CVE List NVDCWE-276
NVD MITRE
6.7CVSSMEDIUM
EPSS Score
0.2%
Top 85.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available

Description

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 Vector Breakdown

AV:LAC:LPR:HUI:NS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-276

Affected Products

lxdcanonical
On-prem
Operating Systems / linux-distro
edk2tianocore
EmbeddedFirmware
Hardware Firmware / bios-uefi
LXDCanonical Ltd.
On-prem
Operating Systems / linux-distro
canonicalcommercialGBOperating Systemsaka canonical ltd.
tianocoreoss-projectHardware Firmwareaka edk2, edk ii
canonical ltd.commercialGBOperating Systemsaka canonical

Attack Graph

Products CVE Techniques Tactics

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

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://bugs.launchpad.net/ubuntu/+source/edk2/+bug/2040137
bugs.launchpad.net
https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/2040139
bugs.launchpad.net
https://nvd.nist.gov/vuln/detail/CVE-2023-48733
nvd.nist.gov
and 1 more references View all →

Timeline

Published
Feb 14, 2024
Last Updated
Aug 26, 2025

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