CVE-2022-49711

Kernel use-after-free via stale mc_io dereference

Published Feb 26, 2025 · Updated May 11, 2026

Use-after-free in the fsl-mc bus removal path in Linux 4.8 and later allows local users to trigger a stale kernel-memory dereference. fsl_mc_device_remove frees root_mc_bus_dev before fsl_mc_bus_remove reads its mc_io member and passes that stale value to fsl_destroy_mc_io. Reachability requires local low-privileged access and removal of a relevant fsl-mc device; the public record does not establish code execution.

CVSS severity7.8
High
EPSS probability0.27%
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 the fsl-mc bus removal path in Linux 4.8 and later allows local users to trigger a stale kernel-memory dereference. fsl_mc_device_remove frees root_mc_bus_dev before fsl_mc_bus_remove reads its mc_io member and passes that stale value to fsl_destroy_mc_io. Reachability requires local low-privileged access and removal of a relevant fsl-mc device; the public record does not establish code execution.

The record

CVE
CVE-2022-49711
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416
Attack vector
local
Privileges
authenticated

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=4.8
  2. Affected versionversion=f93627146f0e371093966ed3d44c065aa077cfb1 <161b68b0a728377aaa10a8e14c70e7734f3c9ff7
  3. Affected versionversion=f93627146f0e371093966ed3d44c065aa077cfb1 <720ab105df7bf3eee62d2bddd41526b29d07d045
  4. Affected versionversion=f93627146f0e371093966ed3d44c065aa077cfb1 <928ea98252ad75118950941683893cf904541da9
  5. Affected versionversion=f93627146f0e371093966ed3d44c065aa077cfb1 <ccd1751092341ac120a961835211f9f2e3735963

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.8; version=f93627146f0e371093966ed3d44c065aa077cfb1 <161b68b0a728377aaa10a8e14c70e7734f3c9ff7; version=f93627146f0e371093966ed3d44c065aa077cfb1 <720ab105df7bf3eee62d2bddd41526b29d07d045; version=f93627146f0e371093966ed3d44c065aa077cfb1 <928ea98252ad75118950941683893cf904541da9; version=f93627146f0e371093966ed3d44c065aa077cfb1 <ccd1751092341ac120a961835211f9f2e3735963

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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

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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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

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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