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CVE-2023-52893

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: gsmi: fix null-deref in gsmi_get_variable We can get EFI variables without fetching the attribute, so we must allow for that in…

Published Aug 21, 2024CWE-476EPSS 0.24%

Overview

CVE-2023-52893 is a medium-severity vulnerability. It was published on August 21, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

gsmi: fix null-deref in gsmi_get_variable

We can get EFI variables without fetching the attribute, so we must

allow for that in gsmi.

commit 859748255b43 ("efi: pstore: Omit efivars caching EFI varstore

access layer") added a new get_variable call with attr=NULL, which

triggers panic in gsmi.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/32313c11bdc8a02c577abaf865be3664ab30410aRefgit.kernel.org/stable/c/6646d769fdb0ce4318ef9afd127f8526d1ca8393Refgit.kernel.org/stable/c/a769b05eeed7accc4019a1ed9799dd72067f1ce8Refgit.kernel.org/stable/c/ae2a9dcc8caa60b1e14671294e5ec902ea5d1dfdRefgit.kernel.org/stable/c/eb0421d90f916dffe96b4c049ddf01c0c50620d2Refgit.kernel.org/stable/c/ee5763ef829bd923033510de6d1df7c73f085e4bRefgit.kernel.org/stable/c/ffef77794fb5f1245c3249b86342bad2299accb5

How CyberStrike helps

Frequently asked questions

What is CVE-2023-52893?

CVE-2023-52893 is a medium-severity vulnerability. It was published on August 21, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-52893?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-52893?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-52893?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-52893 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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