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CVE-2022-49270

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: dm: fix use-after-free in dm_cleanup_zoned_dev() dm_cleanup_zoned_dev() uses queue, so it must be called before blk_cleanup_dis…

Published Feb 26, 2025CWE-416EPSS 0.27%

Overview

CVE-2022-49270 is a high-severity vulnerability. It was published on February 26, 2025 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:

dm: fix use-after-free in dm_cleanup_zoned_dev()

dm_cleanup_zoned_dev() uses queue, so it must be called

before blk_cleanup_disk() starts its killing:

blk_cleanup_disk->blk_cleanup_queue()->kobject_put()->blk_release_queue()->

->...RCU...->blk_free_queue_rcu()->kmem_cache_free()

Otherwise, RCU callback may be executed first and

dm_cleanup_zoned_dev() will touch free'd memory:

BUG: KASAN: use-after-free in dm_cleanup_zoned_dev+0x33/0xd0

Read of size 8 at addr ffff88805ac6e430 by task dmsetup/681

CPU: 4 PID: 681 Comm: dmsetup Not tainted 5.17.0-rc2+ #6

Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014

Call Trace:

<TASK>

dump_stack_lvl+0x57/0x7d

print_address_description.constprop.0+0x1f/0x150

? dm_cleanup_zoned_dev+0x33/0xd0

kasan_report.cold+0x7f/0x11b

? dm_cleanup_zoned_dev+0x33/0xd0

dm_cleanup_zoned_dev+0x33/0xd0

__dm_destroy+0x26a/0x400

? dm_blk_ioctl+0x230/0

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/0987f00a76a17aa7213da492c00ed9e5a6210c73Refgit.kernel.org/stable/c/43a043aed964659bc69ef81f266912b73c80d837Refgit.kernel.org/stable/c/588b7f5df0cb64f281290c7672470c006abe7160Refgit.kernel.org/stable/c/fdfe414ca28ddfd562c233fb27385cf820de03e8

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49270?

CVE-2022-49270 is a high-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2022-49270?

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-2022-49270?

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-2022-49270?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49270 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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