CVE-2026-46051

Local service hang via premature stripe removal

Published May 27, 2026 · Updated May 27, 2026

Improper locking in Linux Kernel md/raid5 allows local users to hang RAID5 processing by submitting overlapping reads to an active array. The retry_aligned_read() path releases an overlapped stripe, then removes it from handle_list before handle_stripe() can resolve the overlap. Low-privileged local access and an active RAID5 array are required; raid5d loops indefinitely, causing a CPU soft lockup and service interruption.

CVSS severity5.5
Medium
EPSS probability0.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in Linux Kernel md/raid5 allows local users to hang RAID5 processing by submitting overlapping reads to an active array. The retry_aligned_read() path releases an overlapped stripe, then removes it from handle_list before handle_stripe() can resolve the overlap. Low-privileged local access and an active RAID5 array are required; raid5d loops indefinitely, causing a CPU soft lockup and service interruption.

The record

CVE
CVE-2026-46051
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=3.12
  2. Affected versionversion=773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 <09880592f5a9dc73377d6eb5ac123537b5f8df49
  3. Affected versionversion=773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 <1985cb3247e87ff6b8ca4bc5f9626f4f51024507
  4. Affected versionversion=773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 <7f9f7c697474268d9ef9479df3ddfe7cdcfbbffc
  5. Affected versionversion=773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 <80fc6ca2cbde018d52e13f305edcd643911bd94b
  6. Affected versionversion=773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 <883cc33b7af1c448663287f069ef9dfea001e90f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.12; version=773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 <09880592f5a9dc73377d6eb5ac123537b5f8df49; version=773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 <1985cb3247e87ff6b8ca4bc5f9626f4f51024507; version=773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 <7f9f7c697474268d9ef9479df3ddfe7cdcfbbffc; version=773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 <80fc6ca2cbde018d52e13f305edcd643911bd94b; version=773ca82fa1ee58dd1bf88b6a5ca385ec83a2cac6 <883cc33b7af1c448663287f069ef9dfea001e90f

Published CVSS scores

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-667Improper Locking
T1499.004Application or System Exploitation

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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