CVE-2026-46326

Local kernel memory corruption via uninitialized transfer

Published Jun 9, 2026 · Updated Jun 9, 2026

Uninitialized memory use in the Linux Kernel mprls0025pa SPI pressure driver from 6.9 allows local users to corrupt kernel memory. The mpr_spi_xfer path passes a stack-allocated spi_transfer to the SPI core without zeroing unused fields, so stale values can corrupt transfer lists and DMA state. A Honeywell MPR sensor must be bound to the driver; world-readable IIO pressure reads can then cause kernel memory disclosure, arbitrary kernel writes or code execution, and a kernel panic.

CVSS severity8.4
High
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

Uninitialized memory use in the Linux Kernel mprls0025pa SPI pressure driver from 6.9 allows local users to corrupt kernel memory. The mpr_spi_xfer path passes a stack-allocated spi_transfer to the SPI core without zeroing unused fields, so stale values can corrupt transfer lists and DMA state. A Honeywell MPR sensor must be bound to the driver; world-readable IIO pressure reads can then cause kernel memory disclosure, arbitrary kernel writes or code execution, and a kernel panic.

The record

CVE
CVE-2026-46326
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1068
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 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=6.9
  2. Affected versionversion=a0858f0cd28e822b91376ae288d5548bc1847531 <1e0ac56c92e26115cbc8cfc639843725cb3a7d6a
  3. Affected versionversion=a0858f0cd28e822b91376ae288d5548bc1847531 <664ffdf34c01810085e4d85508b361c3fdd2ab40
  4. Affected versionversion=a0858f0cd28e822b91376ae288d5548bc1847531 <72158f9ae29a9e56d0f9704ce461a866feaf9925
  5. Affected versionversion=a0858f0cd28e822b91376ae288d5548bc1847531 <9080c7ac30f5f8f8fcb7b27b56df60fea7909c21

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.9; version=a0858f0cd28e822b91376ae288d5548bc1847531 <1e0ac56c92e26115cbc8cfc639843725cb3a7d6a; version=a0858f0cd28e822b91376ae288d5548bc1847531 <664ffdf34c01810085e4d85508b361c3fdd2ab40; version=a0858f0cd28e822b91376ae288d5548bc1847531 <72158f9ae29a9e56d0f9704ce461a866feaf9925; version=a0858f0cd28e822b91376ae288d5548bc1847531 <9080c7ac30f5f8f8fcb7b27b56df60fea7909c21

Published CVSS scores

8.4kernel.orgCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

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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