CVE-2026-31768

Kernel compromise via DMA-unsafe SPI read buffer

Published May 1, 2026 · Updated May 1, 2026

Memory corruption in the TI ADC driver allows local users to compromise the Linux kernel through an SPI read operation. The driver passes stack-backed response variables to spi_read(), although SPI transfer buffers must be safe for direct memory access. Exploitation requires low-privileged local access and an affected TI ADC device using this driver, and can expose or alter kernel data or crash the system.

CVSS severity7.8
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

Memory corruption in the TI ADC driver allows local users to compromise the Linux kernel through an SPI read operation. The driver passes stack-backed response variables to spi_read(), although SPI transfer buffers must be safe for direct memory access. Exploitation requires low-privileged local access and an affected TI ADC device using this driver, and can expose or alter kernel data or crash the system.

The record

CVE
CVE-2026-31768
Published
May 1, 2026
Updated
May 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2026CVE publishedPublication date reported by the CVE source.
  2. May 1, 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=4.9
  2. Affected versionversion=4d671b71beefbfc145b971a11e0c3cabde94b673 <014c6d27878d3883f7bb065610768fd021de1a96
  3. Affected versionversion=4d671b71beefbfc145b971a11e0c3cabde94b673 <67b3a91bdc48220bfb67155ab528121b9c822782
  4. Affected versionversion=4d671b71beefbfc145b971a11e0c3cabde94b673 <768461517a28d80fe81ea4d5d03a90cd184ea6ad
  5. Affected versionversion=4d671b71beefbfc145b971a11e0c3cabde94b673 <b3bb8faeca1a2ef7be95ee8a512b639f9ffce947
  6. Affected versionversion=4d671b71beefbfc145b971a11e0c3cabde94b673 <d2d031b0786ea66ab0577c9d2d71435068d32199
  7. Affected versionversion=4d671b71beefbfc145b971a11e0c3cabde94b673 <fa64aab25aba47296aa8d12bb4c88ec3fecb2054

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.9; version=4d671b71beefbfc145b971a11e0c3cabde94b673 <014c6d27878d3883f7bb065610768fd021de1a96; version=4d671b71beefbfc145b971a11e0c3cabde94b673 <67b3a91bdc48220bfb67155ab528121b9c822782; version=4d671b71beefbfc145b971a11e0c3cabde94b673 <768461517a28d80fe81ea4d5d03a90cd184ea6ad; version=4d671b71beefbfc145b971a11e0c3cabde94b673 <b3bb8faeca1a2ef7be95ee8a512b639f9ffce947; version=4d671b71beefbfc145b971a11e0c3cabde94b673 <d2d031b0786ea66ab0577c9d2d71435068d32199; version=4d671b71beefbfc145b971a11e0c3cabde94b673 <fa64aab25aba47296aa8d12bb4c88ec3fecb2054

Published CVSS scores

7.8UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.8UbuntuCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N

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

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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