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CVE-2022-49821

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: mISDN: fix possible memory leak in mISDN_dsp_element_register() Afer commit 1fa5ae857bb1 ("driver core: get rid of struct devic…

Published May 1, 2025CWE-401EPSS 0.20%

Overview

CVE-2022-49821 is a medium-severity vulnerability. It was published on May 1, 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:

mISDN: fix possible memory leak in mISDN_dsp_element_register()

Afer commit 1fa5ae857bb1 ("driver core: get rid of struct device's

bus_id string array"), the name of device is allocated dynamically,

use put_device() to give up the reference, so that the name can be

freed in kobject_cleanup() when the refcount is 0.

The 'entry' is going to be freed in mISDN_dsp_dev_release(), so the

kfree() is removed. list_del() is called in mISDN_dsp_dev_release(),

so it need be initialized.

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/083a2c9ef82e184bdf0b9f9a1e5fc38d32afbb47Refgit.kernel.org/stable/c/0f2c681900a01e3f23789bca26d88268c3d5b51dRefgit.kernel.org/stable/c/727ed7d28348c026c7ef4d852f3d0e5054d376e8Refgit.kernel.org/stable/c/7a05e3929668c8cfef495c69752a9e91fac4878fRefgit.kernel.org/stable/c/98a2ac1ca8fd6eca6867726fe238d06e75eb1acdRefgit.kernel.org/stable/c/b119bedbefb7dd9ed8bf8cb9f1056504250d610eRefgit.kernel.org/stable/c/bbd53d05c4c892080ef3b617eff4f57903acecb9Refgit.kernel.org/stable/c/d4b8394725079670be309f9a35ad88a8cbbaaefd

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49821?

CVE-2022-49821 is a medium-severity vulnerability. It was published on May 1, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49821?

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-2022-49821?

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-2022-49821?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49821 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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