CVE-2022-49400

Kernel panic via cleared RAID personality pointer

Published Feb 26, 2025 · Updated May 23, 2026

A null-pointer dereference in the Linux MD RAID subsystem allows local users to crash the kernel during a RAID personality reshape. During a reshape from RAID0, raid0_free clears mddev->private after the reshape code stores the new personality there, leaving later RAID code to dereference NULL. Reaching the fault requires low-privileged local access and an active MD RAID reshape; the reported consequence is a kernel panic and service interruption.

CVSS severity5.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

A null-pointer dereference in the Linux MD RAID subsystem allows local users to crash the kernel during a RAID personality reshape. During a reshape from RAID0, raid0_free clears mddev->private after the reshape code stores the new personality there, leaving later RAID code to dereference NULL. Reaching the fault requires low-privileged local access and an active MD RAID reshape; the reported consequence is a kernel panic and service interruption.

The record

CVE
CVE-2022-49400
Published
Feb 26, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. May 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=00e3d58f50a875343124bcf5a9637520a492b0d1 <f63fd1e0e0fc158023cc67ea6a07e278019061ba
  2. Affected versionversion=0c031fd37f69deb0cd8c43bbfcfccd62ebd7e952 <0f2571ad7a30ff6b33cde142439f9378669f8b4f
  3. Affected versionversion=0c031fd37f69deb0cd8c43bbfcfccd62ebd7e952 <7da3454a65f8a56e65dfb44fa0ccac08cbc2f5a1
  4. Affected versionversion=0c031fd37f69deb0cd8c43bbfcfccd62ebd7e952 <b7a51df785031cc49caf1c59766ca89cfa97b54b
  5. Affected versionversion=5.15.17 <5.15.46
  6. Affected versionversion=5.16.3 <5.17
  7. Affected versionversion=5.17
  8. Affected versionversion=92053ae0398a58c6914e807d5e070297ba8cfe88

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=00e3d58f50a875343124bcf5a9637520a492b0d1 <f63fd1e0e0fc158023cc67ea6a07e278019061ba; version=0c031fd37f69deb0cd8c43bbfcfccd62ebd7e952 <0f2571ad7a30ff6b33cde142439f9378669f8b4f; version=0c031fd37f69deb0cd8c43bbfcfccd62ebd7e952 <7da3454a65f8a56e65dfb44fa0ccac08cbc2f5a1; version=0c031fd37f69deb0cd8c43bbfcfccd62ebd7e952 <b7a51df785031cc49caf1c59766ca89cfa97b54b; version=5.15.17 <5.15.46; version=5.16.3 <5.17; version=5.17; version=92053ae0398a58c6914e807d5e070297ba8cfe88

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo