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CVE-2022-49989

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: xen/privcmd: fix error exit of privcmd_ioctl_dm_op() The error exit of privcmd_ioctl_dm_op() is calling unlock_pages() potentia…

Published Jun 18, 2025CWE-476EPSS 0.24%

Overview

CVE-2022-49989 is a medium-severity vulnerability. It was published on June 18, 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:

xen/privcmd: fix error exit of privcmd_ioctl_dm_op()

The error exit of privcmd_ioctl_dm_op() is calling unlock_pages()

potentially with pages being NULL, leading to a NULL dereference.

Additionally lock_pages() doesn't check for pin_user_pages_fast()

having been completely successful, resulting in potentially not

locking all pages into memory. This could result in sporadic failures

when using the related memory in user mode.

Fix all of that by calling unlock_pages() always with the real number

of pinned pages, which will be zero in case pages being NULL, and by

checking the number of pages pinned by pin_user_pages_fast() matching

the expected number of pages.

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/45d47bd9b96e7874b98dbcc7602fe2826c5d62a6Refgit.kernel.org/stable/c/6de50db104af0dc921f593fd95c55db86a52ceefRefgit.kernel.org/stable/c/c2b7bae7c90051fd6a679d5dee00400d67ebbf4aRefgit.kernel.org/stable/c/c5deb27895e017a0267de0a20d140ad5fcc55a54

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49989?

CVE-2022-49989 is a medium-severity vulnerability. It was published on June 18, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49989?

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-2022-49989?

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-2022-49989?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49989 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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