CVE-2026-46161

Local system crash via zero RAID10 far copies

Published May 28, 2026 · Updated May 28, 2026

Divide-by-zero in the Linux Kernel RAID10 driver allows local users to crash the system through a crafted array layout. The setup_geo() function extracts near_copies and far_copies from the user-supplied layout without rejecting zero, then divides the disk count by far_copies. Triggering the crash requires low-privileged local access, permission to configure an md RAID10 array, and selection of the improved far-set layout with zero far copies.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Divide-by-zero in the Linux Kernel RAID10 driver allows local users to crash the system through a crafted array layout. The setup_geo() function extracts near_copies and far_copies from the user-supplied layout without rejecting zero, then divides the disk count by far_copies. Triggering the crash requires low-privileged local access, permission to configure an md RAID10 array, and selection of the improved far-set layout with zero far copies.

The record

CVE
CVE-2026-46161
Published
May 28, 2026
Updated
May 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-369, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 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=3.9
  2. Affected versionversion=475901aff15841fb0a81e7546517407779a9b061 <4af2e558e6fdfb972c61350653fd55d1f62b60a5
  3. Affected versionversion=475901aff15841fb0a81e7546517407779a9b061 <913d556e4bd1b56ed822815655b82c7bb54edc51
  4. Affected versionversion=475901aff15841fb0a81e7546517407779a9b061 <9aa6d860b0930e2f72795665c42c44252a558a0c
  5. Affected versionversion=475901aff15841fb0a81e7546517407779a9b061 <9d8e03b9a2b1e8ce5c198bf3a409a629f4d02cda
  6. Affected versionversion=475901aff15841fb0a81e7546517407779a9b061 <f9ddb621b2325eb69c95692958daf2bab4dea2c4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3.9; version=475901aff15841fb0a81e7546517407779a9b061 <4af2e558e6fdfb972c61350653fd55d1f62b60a5; version=475901aff15841fb0a81e7546517407779a9b061 <913d556e4bd1b56ed822815655b82c7bb54edc51; version=475901aff15841fb0a81e7546517407779a9b061 <9aa6d860b0930e2f72795665c42c44252a558a0c; version=475901aff15841fb0a81e7546517407779a9b061 <9d8e03b9a2b1e8ce5c198bf3a409a629f4d02cda; version=475901aff15841fb0a81e7546517407779a9b061 <f9ddb621b2325eb69c95692958daf2bab4dea2c4

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS: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.

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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-369Divide By Zero
T1499.004Endpoint Denial of Service: Application 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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