CVE-2022-49270

Kernel crash via stale device-mapper queue access

Published Feb 26, 2025 · Updated May 11, 2026

Use-after-free in Linux kernel 5.14 and later affected branches allows local users to crash the kernel during device-mapper teardown. The __dm_destroy path calls blk_cleanup_disk before dm_cleanup_zoned_dev, allowing an RCU callback to free the request queue before the cleanup routine dereferences it. Triggering the flaw requires local access and a zoned device-mapper device; the stale queue access can corrupt kernel memory or interrupt the system.

CVSS severity7.8
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel 5.14 and later affected branches allows local users to crash the kernel during device-mapper teardown. The __dm_destroy path calls blk_cleanup_disk before dm_cleanup_zoned_dev, allowing an RCU callback to free the request queue before the cleanup routine dereferences it. Triggering the flaw requires local access and a zoned device-mapper device; the stale queue access can corrupt kernel memory or interrupt the system.

The record

CVE
CVE-2022-49270
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.14
  2. Affected versionversion=bb37d77239af25cde59693dbe3fac04dd17d7b29 <0987f00a76a17aa7213da492c00ed9e5a6210c73
  3. Affected versionversion=bb37d77239af25cde59693dbe3fac04dd17d7b29 <43a043aed964659bc69ef81f266912b73c80d837
  4. Affected versionversion=bb37d77239af25cde59693dbe3fac04dd17d7b29 <588b7f5df0cb64f281290c7672470c006abe7160
  5. Affected versionversion=bb37d77239af25cde59693dbe3fac04dd17d7b29 <fdfe414ca28ddfd562c233fb27385cf820de03e8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=5.14; version=bb37d77239af25cde59693dbe3fac04dd17d7b29 <0987f00a76a17aa7213da492c00ed9e5a6210c73; version=bb37d77239af25cde59693dbe3fac04dd17d7b29 <43a043aed964659bc69ef81f266912b73c80d837; version=bb37d77239af25cde59693dbe3fac04dd17d7b29 <588b7f5df0cb64f281290c7672470c006abe7160; version=bb37d77239af25cde59693dbe3fac04dd17d7b29 <fdfe414ca28ddfd562c233fb27385cf820de03e8

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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