CVE-2026-46192

Local flash-read denial via spurious QSPI transmission

Published May 28, 2026 · Updated May 28, 2026

Denial of service in the Microchip CoreQSPI driver in the Linux kernel allows local users to stall flash reads via dual or quad operations. The driver initiates a garbage-data transmission during emulated read-only operations even though the controller generates the required clock cycles, leaving the QSPI transfer unable to complete. Reachability requires local access to a system using the affected driver and a device exercising an emulated dual or quad read; the bounded consequence is interruption of that flash transfer.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the Microchip CoreQSPI driver in the Linux kernel allows local users to stall flash reads via dual or quad operations. The driver initiates a garbage-data transmission during emulated read-only operations even though the controller generates the required clock cycles, leaving the QSPI transfer unable to complete. Reachability requires local access to a system using the affected driver and a device exercising an emulated dual or quad read; the bounded consequence is interruption of that flash transfer.

The record

CVE
CVE-2026-46192
Published
May 28, 2026
Updated
May 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.17
  2. Affected versionversion=8f9cf02c8852837923f1cdacfcc92e138513325c <67184f361ab4d9fac6d2b8d5fed6649d496038a4
  3. Affected versionversion=8f9cf02c8852837923f1cdacfcc92e138513325c <eb56deaabf127e8985fc91fa6c97bf8a3b062844
  4. Affected versionversion=8f9cf02c8852837923f1cdacfcc92e138513325c <ec9d0ddbde6003c303fa5e1d5cd48952852984d8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.17; version=8f9cf02c8852837923f1cdacfcc92e138513325c <67184f361ab4d9fac6d2b8d5fed6649d496038a4; version=8f9cf02c8852837923f1cdacfcc92e138513325c <eb56deaabf127e8985fc91fa6c97bf8a3b062844; version=8f9cf02c8852837923f1cdacfcc92e138513325c <ec9d0ddbde6003c303fa5e1d5cd48952852984d8

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 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

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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