CVE-2026-45874

Kernel crash via unchecked refclk-pad pointer

Published May 27, 2026 · Updated May 27, 2026

NULL pointer dereference in Linux Kernel 6.11 through 6.12.74, 6.13 through 6.18.13, and 6.19 through 6.19.3 allows local users to crash systems. The probe assigns NULL to refclk_pad when fsl,refclk-pad-mode is absent, and imx_hsio_configure_clk_pad dereferences it without checking. Reachability requires the Freescale IMX8QM HSIO PHY driver and an affected device-tree node; the public record does not identify how a local user initiates probing.

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

What happened

NULL pointer dereference in Linux Kernel 6.11 through 6.12.74, 6.13 through 6.18.13, and 6.19 through 6.19.3 allows local users to crash systems. The probe assigns NULL to refclk_pad when fsl,refclk-pad-mode is absent, and imx_hsio_configure_clk_pad dereferences it without checking. Reachability requires the Freescale IMX8QM HSIO PHY driver and an affected device-tree node; the public record does not identify how a local user initiates probing.

The record

CVE
CVE-2026-45874
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499
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=6.11
  2. Affected versionversion=82c56b6dd24fcdf811f2b47b72e5585c8a79b685 <4dd5d4c0361af0a3fd24f45c815996abf4429770
  3. Affected versionversion=82c56b6dd24fcdf811f2b47b72e5585c8a79b685 <8d29e81e9cdec84d4b9acb1736550d35e86c88af
  4. Affected versionversion=82c56b6dd24fcdf811f2b47b72e5585c8a79b685 <a771b386cb6c6e582e7b50f8eeff3347ff887f71
  5. Affected versionversion=82c56b6dd24fcdf811f2b47b72e5585c8a79b685 <dd8b9ba3d9701832cfb5dcefd8b43250df28dbc2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.11; version=82c56b6dd24fcdf811f2b47b72e5585c8a79b685 <4dd5d4c0361af0a3fd24f45c815996abf4429770; version=82c56b6dd24fcdf811f2b47b72e5585c8a79b685 <8d29e81e9cdec84d4b9acb1736550d35e86c88af; version=82c56b6dd24fcdf811f2b47b72e5585c8a79b685 <a771b386cb6c6e582e7b50f8eeff3347ff887f71; version=82c56b6dd24fcdf811f2b47b72e5585c8a79b685 <dd8b9ba3d9701832cfb5dcefd8b43250df28dbc2

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.

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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-476NULL Pointer Dereference
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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