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CVE-2025-21772

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: partitions: mac: fix handling of bogus partition table Fix several issues in partition probing: - The bailout for a bad parto…

Published Feb 27, 2025CWE-787EPSS 0.24%

Overview

CVE-2025-21772 is a high-severity vulnerability. It was published on February 27, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. 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:

partitions: mac: fix handling of bogus partition table

Fix several issues in partition probing:

- The bailout for a bad partoffset must use put_dev_sector(), since the

preceding read_part_sector() succeeded.

- If the partition table claims a silly sector size like 0xfff bytes

(which results in partition table entries straddling sector boundaries),

bail out instead of accessing out-of-bounds memory.

- We must not assume that the partition table contains proper NUL

termination - use strnlen() and strncmp() instead of strlen() and

strcmp().

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/213ba5bd81b7e97ac6e6190b8f3bc6ba76123625Refgit.kernel.org/stable/c/27a39d006f85e869be68c1d5d2ce05e5d6445bf5Refgit.kernel.org/stable/c/40a35d14f3c0dc72b689061ec72fc9b193f37d1fRefgit.kernel.org/stable/c/6578717ebca91678131d2b1f4ba4258e60536e9fRefgit.kernel.org/stable/c/7fa9706722882f634090bfc9af642bf9ed719e27Refgit.kernel.org/stable/c/80e648042e512d5a767da251d44132553fe04ae0Refgit.kernel.org/stable/c/92527100be38ede924768f4277450dfe8a40e16bRefgit.kernel.org/stable/c/a3e77da9f843e4ab93917d30c314f0283e28c124Reflists.debian.org/debian-lts-announce/2025/03/msg00028.htmlReflists.debian.org/debian-lts-announce/2025/05/msg00030.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-21772?

CVE-2025-21772 is a high-severity vulnerability. It was published on February 27, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2025-21772?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-21772?

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-2025-21772?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-21772 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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