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CVE-2022-49220

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: dax: make sure inodes are flushed before destroy cache A bug can be triggered by following command $ modprobe nd_pmem && modpr…

Published Feb 26, 2025EPSS 0.27%

Overview

CVE-2022-49220 is a medium-severity vulnerability. It was published on February 26, 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:

dax: make sure inodes are flushed before destroy cache

A bug can be triggered by following command

$ modprobe nd_pmem && modprobe -r nd_pmem

[ 10.060014] BUG dax_cache (Not tainted): Objects remaining in dax_cache on __kmem_cache_shutdown()

[ 10.060938] Slab 0x0000000085b729ac objects=9 used=1 fp=0x000000004f5ae469 flags=0x200000000010200(slab|head|node)

[ 10.062433] Call Trace:

[ 10.062673] dump_stack_lvl+0x34/0x44

[ 10.062865] slab_err+0x90/0xd0

[ 10.063619] __kmem_cache_shutdown+0x13b/0x2f0

[ 10.063848] kmem_cache_destroy+0x4a/0x110

[ 10.064058] __x64_sys_delete_module+0x265/0x300

This is caused by dax_fs_exit() not flushing inodes before destroy cache.

To fix this issue, call rcu_barrier() before destroy cache.

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/770d42fff12d8595adda9025a0b92091f543e775Refgit.kernel.org/stable/c/a7e8de822e0b1979f08767c751f6c8a9c1d4ad86Refgit.kernel.org/stable/c/b786abe7c67c6ef71410c8e23292b3091d616ad1Refgit.kernel.org/stable/c/e2951eaa9398415ac054b7bd80b8163b6838ead4Refgit.kernel.org/stable/c/ec376f5c11c88c0215d173599db8449cd4196759Refgit.kernel.org/stable/c/f2a1e0eb70c2d954176c07d75d28742bde30e9f3

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49220?

CVE-2022-49220 is a medium-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49220?

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-2022-49220?

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-2022-49220?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49220 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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