CVE-2026-46023

Kernel service interrupt via wrapped argument count

Published May 27, 2026 · Updated May 27, 2026

Integer overflow in the Linux Kernel dm mirror target allows local users to trigger out-of-bounds kernel reads through a crafted table. The create_dirty_log() argument-count calculation adds two to an unvalidated param_count before comparing the wrapped result with argc, then passes the oversized count to dm_dirty_log_create(). This requires local permission to load a device-mapper table; the reported consequence is an out-of-bounds read that can interrupt the kernel.

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

Integer overflow in the Linux Kernel dm mirror target allows local users to trigger out-of-bounds kernel reads through a crafted table. The create_dirty_log() argument-count calculation adds two to an unvalidated param_count before comparing the wrapped result with argc, then passes the oversized count to dm_dirty_log_create(). This requires local permission to load a device-mapper table; the reported consequence is an out-of-bounds read that can interrupt the kernel.

The record

CVE
CVE-2026-46023
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-190, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <17a08791d428885d00e510864283a7b839792368
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <35f6b3281efd44d19110574663bc17a610bc73b9
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <47dad9eea75d33212d3d2cea10e7ed6a1bfc0713
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4c788c6f921b22f9b6c3f316c4a071c05683e7de
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <87c99a50e0fdc68a5b9b52a94d49452cd3ff02ca
  6. Affected versionversion=2.6.12

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <17a08791d428885d00e510864283a7b839792368; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <35f6b3281efd44d19110574663bc17a610bc73b9; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <47dad9eea75d33212d3d2cea10e7ed6a1bfc0713; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4c788c6f921b22f9b6c3f316c4a071c05683e7de; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <87c99a50e0fdc68a5b9b52a94d49452cd3ff02ca; version=2.6.12

Published CVSS scores

7.0Oracle LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.1Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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-190Integer Overflow or Wraparound
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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