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CVE-2022-50506

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: drbd: only clone bio if we have a backing device Commit c347a787e34cb (drbd: set ->bi_bdev in drbd_req_new) moved a bio_set_dev…

Published Oct 4, 2025CWE-476EPSS 0.14%

Overview

CVE-2022-50506 is a medium-severity vulnerability. It was published on October 4, 2025 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:

drbd: only clone bio if we have a backing device

Commit c347a787e34cb (drbd: set ->bi_bdev in drbd_req_new) moved a

bio_set_dev call (which has since been removed) to "earlier", from

drbd_request_prepare to drbd_req_new.

The problem is that this accesses device->ldev->backing_bdev, which is

not NULL-checked at this point. When we don't have an ldev (i.e. when

the DRBD device is diskless), this leads to a null pointer deref.

So, only allocate the private_bio if we actually have a disk. This is

also a small optimization, since we don't clone the bio to only to

immediately free it again in the diskless case.

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/05580a3bbf3cec677cb00a85dfeb21d6a9b48eafRefgit.kernel.org/stable/c/6d42ddf7f27b6723549ee6d4c8b1b418b59bf6b5

How CyberStrike helps

Frequently asked questions

What is CVE-2022-50506?

CVE-2022-50506 is a medium-severity vulnerability. It was published on October 4, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-50506?

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-2022-50506?

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-2022-50506?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-50506 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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