CVE-2022-49384

Kernel memory corruption via duplicate bioset release

Published Feb 26, 2025 · Updated May 23, 2026

A double free in Linux kernel MD RAID allows local users to corrupt kernel memory when an affected array is stopped or freed. The md_free and md_stop paths call bioset_exit on io_acct_set after the active RAID personality has already released that same bioset. The trigger requires local access and teardown of an affected non-RAID1/10 array; published records do not document a reliable privilege-escalation path.

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

A double free in Linux kernel MD RAID allows local users to corrupt kernel memory when an affected array is stopped or freed. The md_free and md_stop paths call bioset_exit on io_acct_set after the active RAID personality has already released that same bioset. The trigger requires local access and teardown of an affected non-RAID1/10 array; published records do not document a reliable privilege-escalation path.

The record

CVE
CVE-2022-49384
Published
Feb 26, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-415, T1068
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

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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=00e3d58f50a875343124bcf5a9637520a492b0d1 <36a2fc44c574a59ee3b5e2cb327182f227b2b07e
  2. Affected versionversion=0c031fd37f69deb0cd8c43bbfcfccd62ebd7e952 <42b805af102471f53e3c7867b8c2b502ea4eef7e
  3. Affected versionversion=0c031fd37f69deb0cd8c43bbfcfccd62ebd7e952 <ea7d7bd90079d96f9c86bdaf0b106e0cd2a70661
  4. Affected versionversion=0c031fd37f69deb0cd8c43bbfcfccd62ebd7e952 <f99d5b5dc8a42c807b5f1176b925aa45d61962ab
  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 <36a2fc44c574a59ee3b5e2cb327182f227b2b07e; version=0c031fd37f69deb0cd8c43bbfcfccd62ebd7e952 <42b805af102471f53e3c7867b8c2b502ea4eef7e; version=0c031fd37f69deb0cd8c43bbfcfccd62ebd7e952 <ea7d7bd90079d96f9c86bdaf0b106e0cd2a70661; version=0c031fd37f69deb0cd8c43bbfcfccd62ebd7e952 <f99d5b5dc8a42c807b5f1176b925aa45d61962ab; version=5.15.17 <5.15.46; version=5.16.3 <5.17; version=5.17; version=92053ae0398a58c6914e807d5e070297ba8cfe88

Published CVSS scores

7.8NVDCVSS: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.

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-415Double 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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