CVE-2026-23224

Kernel panic via direct-I/O request lifetime race

Published Feb 18, 2026 · Updated Feb 18, 2026

Use-after-free in Linux Kernel EROFS allows local users to trigger a kernel panic through reads on a direct-I/O file-backed mount. erofs_fileio_ki_complete frees an erofs_fileio_rq after asynchronous completion while erofs_fileio_rq_submit still reaches file_accessed through the freed iocb.ki_filp pointer. Local users able to read files on an EROFS mount can interrupt the host, but the mount must be file-backed with directio enabled.

CVSS severity7.8
High
EPSS probability0.12%
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 EROFS allows local users to trigger a kernel panic through reads on a direct-I/O file-backed mount. erofs_fileio_ki_complete frees an erofs_fileio_rq after asynchronous completion while erofs_fileio_rq_submit still reaches file_accessed through the freed iocb.ki_filp pointer. Local users able to read files on an EROFS mount can interrupt the host, but the mount must be file-backed with directio enabled.

The record

CVE
CVE-2026-23224
Published
Feb 18, 2026
Updated
Feb 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ae385826840a3c8e09bf38cac90adcd690716f57
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b2ee5e4d5446babd23ff7beb4e636be0fb3ea5aa
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d741534302f71c511eb0bb670b92eaa7df4a0aec

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ae385826840a3c8e09bf38cac90adcd690716f57; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b2ee5e4d5446babd23ff7beb4e636be0fb3ea5aa; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d741534302f71c511eb0bb670b92eaa7df4a0aec

Published CVSS scores

7.8kernel.orgCVSS: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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
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

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Your stack

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