CVE-2025-71225

Local memory disclosure and crash via reshape race

Published Feb 18, 2026 · Updated Feb 18, 2026

Race condition in Linux Kernel md RAID1 allows local users to disclose memory or crash the system during a sysfs reshape. During I/O error handling, freeze_array() returns while old-size r1bio objects remain queued, so free_r1bio() uses the new raid_disks count and accesses beyond their bounds. Exploitation requires local low-privileged access, a sysfs raid_disks update, concurrent normal I/O, and an I/O error; consequences are limited to memory disclosure or system interruption.

CVSS severity5.3
Medium
EPSS probability0.08%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Linux Kernel md RAID1 allows local users to disclose memory or crash the system during a sysfs reshape. During I/O error handling, freeze_array() returns while old-size r1bio objects remain queued, so free_r1bio() uses the new raid_disks count and accesses beyond their bounds. Exploitation requires local low-privileged access, a sysfs raid_disks update, concurrent normal I/O, and an I/O error; consequences are limited to memory disclosure or system interruption.

The record

CVE
CVE-2025-71225
Published
Feb 18, 2026
Updated
Feb 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-367, 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 <0107b18cd8ac17eb3e54786adc05a85cdbb6ef22
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <165d1359f945b72c5f90088f60d48ff46115269e
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2cc583653bbe050bacd1cadcc9776d39bf449740

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <0107b18cd8ac17eb3e54786adc05a85cdbb6ef22; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <165d1359f945b72c5f90088f60d48ff46115269e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2cc583653bbe050bacd1cadcc9776d39bf449740

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
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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