How severe is CVE-2023-48733?

CVE-2023-48733 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-48733 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-48733?

CVE-2023-48733 primarily affects Canonical Lxd. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-48733?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-48733 have an EU (EUVD) identifier?

Yes. CVE-2023-48733 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-52766.

When was CVE-2023-48733 published?

CVE-2023-48733 was published on 2024-02-14 and last updated on 2026-06-17.

CVE-2023-48733

CVE-2023-48733 is a medium-severity vulnerability in Canonical Lxd with a CVSS 3.x base score of 6.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1188.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
EPSS exploit prediction: 0% (17th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-52766
Weakness: CWE-1188
Affected product: Canonical Lxd
Published: 2024-02-14
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2023-48733?: An insecure default to allow UEFI Shell in EDK2 was left enabled in Ubuntu's EDK2. This allows an OS-resident attacker to bypass Secure Boot.
How severe is CVE-2023-48733?: CVE-2023-48733 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-48733 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (17th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-48733?: CVE-2023-48733 primarily affects Canonical Lxd. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-48733?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2023-48733 have an EU (EUVD) identifier?: Yes. CVE-2023-48733 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-52766.
When was CVE-2023-48733 published?: CVE-2023-48733 was published on 2024-02-14 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:canonical:lxd:5.0:candidate:*:*:*:*:*:*
cpe:2.3:a:canonical:lxd:5.21:candidate:*:*:*:*:*:*
cpe:2.3:a:canonical:lxd:5.21:edge:*:*:*:*:*:*
cpe:2.3:a:tianocore:edk2:*:-:*:*:*:*:*:*
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

More vulnerabilities in Canonical Lxd

CVE-2026-34179 — Critical (CVSS 9.1): In Canonical LXD versions 4.12 through 6.7, the doCertificateUpdate function in lxd/certificates.go does not validate…
CVE-2026-34178 — Critical (CVSS 9.1): In Canonical LXD before 6.8, the backup import path validates project restrictions against backup/index.yaml in the…
CVE-2026-34177 — Critical (CVSS 9.1): Canonical LXD versions 4.12 through 6.7 contain an incomplete denylist in isVMLowLevelOptionForbidden…
CVE-2025-54286 — High (CVSS 8.8): Cross-Site Request Forgery (CSRF) in LXD-UI in Canonical LXD versions >= 5.0 on Linux allows an attacker to create and…
CVE-2026-12411 — High (CVSS 8.4): Broken Access Control in the devLXDInstancePatchHandler component of Canonical LXD allows an untrusted guest to mount,…
CVE-2025-54289 — High (CVSS 8.1): Privilege Escalation in operations API in Canonical LXD <6.5 on multiple platforms allows attacker with read…

All CVEs affecting Canonical Lxd →

Other CWE-1188 (Insecure Default Initialization of Resource) vulnerabilities

CVE-2026-31957 — Critical (CVSS 10.0): Himmelblau is an interoperability suite for Microsoft Azure Entra ID and Intune. From 3.0.0 to before 3.1.0, if…
CVE-2025-41672 — Critical (CVSS 10.0): A remote unauthenticated attacker may use default certificates to generate JWT Tokens and gain full access to the tool…
CVE-2024-0001 — Critical (CVSS 10.0): A condition exists in FlashArray Purity whereby a local account intended for initial array configuration remains active…
CVE-2024-2912 — Critical (CVSS 10.0): An insecure deserialization vulnerability exists in the BentoML framework, allowing remote code execution (RCE) by…
CVE-2021-34795 — Critical (CVSS 10.0): Multiple vulnerabilities in the web-based management interface of the Cisco Catalyst Passive Optical Network (PON)…
CVE-2017-7964 — Critical (CVSS 10.0): Zyxel WRE6505 devices have a default TELNET password of 1234 for the root and admin accounts, which makes it easier for…

Browse all CWE-1188 (Insecure Default Initialization of Resource) vulnerabilities →