CVE-2026-46148

SPI service disruption via unintended chip selection

Published May 28, 2026 · Updated May 28, 2026

Availability flaw in the Linux Kernel microchip-core-qspi driver allows local users to disrupt SPI device communication. The driver leaves the built-in chip select under automatic hardware control, causing it to assert during access to a device selected through GPIO. Reachability requires a coreQSPI controller with multiple attached devices using both selection methods; simultaneous selection can interrupt device communications.

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

Availability flaw in the Linux Kernel microchip-core-qspi driver allows local users to disrupt SPI device communication. The driver leaves the built-in chip select under automatic hardware control, causing it to assert during access to a device selected through GPIO. Reachability requires a coreQSPI controller with multiple attached devices using both selection methods; simultaneous selection can interrupt device communications.

The record

CVE
CVE-2026-46148
Published
May 28, 2026
Updated
May 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
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

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=6.1
  2. Affected versionversion=8596124c4c1bc7561454cee0463c16eca70b5d25 <7672749e1496215e8683ce57cf323119033954cf
  3. Affected versionversion=8596124c4c1bc7561454cee0463c16eca70b5d25 <998f43196d732f20f9b71eb6ebd973736c9fa911
  4. Affected versionversion=8596124c4c1bc7561454cee0463c16eca70b5d25 <ee3c99aa102212ad59dc2c19595515c4a6729307

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.1; version=8596124c4c1bc7561454cee0463c16eca70b5d25 <7672749e1496215e8683ce57cf323119033954cf; version=8596124c4c1bc7561454cee0463c16eca70b5d25 <998f43196d732f20f9b71eb6ebd973736c9fa911; version=8596124c4c1bc7561454cee0463c16eca70b5d25 <ee3c99aa102212ad59dc2c19595515c4a6729307

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 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

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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