CVE-2023-52893

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 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.

Package Linux Kernel
Published 2024-08-21
Last modified 2024-09-11
CVSS version 3.1
Patch available
Yes

CVSS 3.1 score

5.5

out of 10
Medium
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
High
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-476

CVE-2023-52893 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 3.0 and later are affected. Fixed in 4.14.304, 4.19.271, 5.4.230, 5.10.165, 5.15.90, 6.1.8, 6.2 and their respective stable series.

Affected from
≥ 3.0
Fixed in
✓ 4.14.304 4.14.x ✓ 4.19.271 4.19.x ✓ 5.4.230 5.4.x ✓ 5.10.165 5.10.x ✓ 5.15.90 5.15.x ✓ 6.1.8 6.1.x ✓ 6.2

References

The following references provide additional information about CVE-2023-52893 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

7 patch commits total View all on NVD

Frequently asked questions

  • What is CVE-2023-52893?

    CVE-2023-52893 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 3.0 onward and has been patched in 4.14.304, 4.19.271, 5.4.230 and others. CVE-2023-52893 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • What is the CVSS score for CVE-2023-52893?

    CVE-2023-52893 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H .

  • Is there a patch available for CVE-2023-52893?

    Yes — CVE-2023-52893 has been patched. Fixed versions include 4.14.304, 4.19.271, 5.4.230 and others. If you are running Linux kernel 3.0 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2023-52893 actively exploited?

    No — CVE-2023-52893 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

  • What is NULL Pointer Dereference (CWE-476)?

    The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. View CWE-476 on MITRE CWE →

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