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CVE-2026-46045

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: md/md-llbitmap: skip reading rdevs that are not in_sync When reading bitmap pages from member disks, the code iterates through…

Published May 27, 2026CWE-787EPSS 0.17%

Overview

CVE-2026-46045 is a high-severity vulnerability. It was published on May 27, 2026 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:

md/md-llbitmap: skip reading rdevs that are not in_sync

When reading bitmap pages from member disks, the code iterates through

all rdevs and attempts to read from the first available one. However,

it only checks for raid_disk assignment and Faulty flag, missing the

In_sync flag check.

This can cause bitmap data to be read from spare disks that are still

being rebuilt and don't have valid bitmap information yet. Reading

stale or uninitialized bitmap data from such disks can lead to

incorrect dirty bit tracking, potentially causing data corruption

during recovery or normal operation.

Add the In_sync flag check to ensure bitmap pages are only read from

fully synchronized member disks that have valid bitmap data.

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/3115fa2f62970d98f2a639145fb8e2767db8bbf9Refgit.kernel.org/stable/c/7701e68b5072faa03a8f30b4081dc16df9092381Refgit.kernel.org/stable/c/98623c7e2a51eab1833c8628d33fa9c6ef3ce325

How CyberStrike helps

Frequently asked questions

What is CVE-2026-46045?

CVE-2026-46045 is a high-severity vulnerability. It was published on May 27, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-46045?

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-2026-46045?

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-2026-46045?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-46045 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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