CVE-2026-23348

System crash via CXL NVDIMM reprobe race

Published Mar 25, 2026 · Updated Mar 25, 2026

Race condition in Linux Kernel 5.14 through 6.18.16 and 6.19 through 6.19.6 allows local users to crash the kernel during CXL reprobe. Orphaned NVDIMM devices can reprobe after cxl_acpi removal, so __nd_device_register() follows dev->parent into a missing nvdimm_bus and dereferences NULL. Local low-privilege access is required, and successful triggering depends on the CXL module-removal and reprobe timing window.

CVSS severity4.7
Medium
EPSS probability0.09%
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 5.14 through 6.18.16 and 6.19 through 6.19.6 allows local users to crash the kernel during CXL reprobe. Orphaned NVDIMM devices can reprobe after cxl_acpi removal, so __nd_device_register() follows dev->parent into a missing nvdimm_bus and dereferences NULL. Local low-privilege access is required, and successful triggering depends on the CXL module-removal and reprobe timing window.

The record

CVE
CVE-2026-23348
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-362, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 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=5.14
  2. Affected versionversion=8fdcb1704f61a8fd9be0f3849a174d084def0666 <5b230daeee420833287cc77314439903e5312f10
  3. Affected versionversion=8fdcb1704f61a8fd9be0f3849a174d084def0666 <5fc4e150c5ada5f7d20d8f9f1b351f10481fbdf7
  4. Affected versionversion=8fdcb1704f61a8fd9be0f3849a174d084def0666 <96a1fd0d84b17360840f344826897fa71049870e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.14; version=8fdcb1704f61a8fd9be0f3849a174d084def0666 <5b230daeee420833287cc77314439903e5312f10; version=8fdcb1704f61a8fd9be0f3849a174d084def0666 <5fc4e150c5ada5f7d20d8f9f1b351f10481fbdf7; version=8fdcb1704f61a8fd9be0f3849a174d084def0666 <96a1fd0d84b17360840f344826897fa71049870e

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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