CVE-2023-49721 Security feature bypass in LXD
Medium 6.7
Published
Updated
Check this codebase for CVE-2023-49721 and fix it if it is affected.
What it is: CVE-2023-49721 is a medium-severity vulnerability in Canonical Ltd. LXD, published on 14 Feb 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-49721 in the wild and no public exploit code.
Affected product: Canonical Ltd. LXD. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2023-49721/ (Markdown: https://insights.sbomify.com/CVE-2023-49721/index.md)
An insecure default in LXD allows OS-resident attackers to bypass Secure Boot by enabling the UEFI Shell.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-49721?
CVE-2023-49721 is a medium-severity vulnerability in Canonical Ltd. LXD, published on 14 Feb 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Weakness: CWE-276
Which versions are affected by CVE-2023-49721?
It affects 2 products.
Products include Canonical Lxd, Tianocore Edk2.
How do I fix CVE-2023-49721?
Apply the vendor's patch.
Is CVE-2023-49721 being exploited?
There is no known exploitation of CVE-2023-49721 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ltd. LXD
- CVE-2026-66897 Instance template path traversal allows arbitrary host file write as root
- CVE-2026-62420 Cross-project cluster migration bypasses project restrictions via cluster notification flag
- CVE-2026-63293 Arbitrary File Read/Write: metadata.yaml symlink in image allows host filesystem access as root
- CVE-2026-63294 Root RCE via image backup.yaml symlink
- CVE-2026-63296 Project restriction bypass via instance migration config override
Sources
Also known as GHSA-4639-7gfm-29p2, OESA-2026-4033, OESA-2026-4217.