CVE-2026-64083

Kernel stack disclosure via unchecked block-read length

Published Jul 19, 2026 · Updated Jul 19, 2026

Information disclosure in the Linux Kernel ADM1266 driver allows local users to read kernel stack bits through GPIO interfaces. adm1266_gpio_get() and adm1266_gpio_get_multiple() accept zero- or one-byte I2C block responses, then combine uninitialized read_buf bytes into pin state returned through gpiolib. The driver and ADM1266 hardware must be present, and exploitation requires local GPIO access or control of a device that supplies the short response.

CVSS severityUnavailable
Unscored
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

Information disclosure in the Linux Kernel ADM1266 driver allows local users to read kernel stack bits through GPIO interfaces. adm1266_gpio_get() and adm1266_gpio_get_multiple() accept zero- or one-byte I2C block responses, then combine uninitialized read_buf bytes into pin state returned through gpiolib. The driver and ADM1266 hardware must be present, and exploitation requires local GPIO access or control of a device that supplies the short response.

The record

CVE
CVE-2026-64083
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-824, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 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=5.10
  2. Affected versionversion=d98dfad35c38c037b37c4adc99df01da571031a5 <64fa9328948ddcc0f7f3c23ea1756c126d9dffac
  3. Affected versionversion=d98dfad35c38c037b37c4adc99df01da571031a5 <a2d1c819348b36fccbbfcf37c5fa7a50a9b4528f
  4. Affected versionversion=d98dfad35c38c037b37c4adc99df01da571031a5 <a7232f68c43ca62f545049b7f5fbfc75137b843b
  5. Affected versionversion=d98dfad35c38c037b37c4adc99df01da571031a5 <ae25cf2ea9ebd06d7ad416647dbdc7b5d0172946
  6. Affected versionversion=d98dfad35c38c037b37c4adc99df01da571031a5 <c603b6c6840ac0c6285f5eefea0de6242710af21
  7. Affected versionversion=d98dfad35c38c037b37c4adc99df01da571031a5 <eb3cd9bb590460c6127145cb245be925d23f5232
  8. Affected versionversion=d98dfad35c38c037b37c4adc99df01da571031a5 <ee4799becf7d2af3778007e22c2e55c4009a49c7
  9. Affected versionversion=d98dfad35c38c037b37c4adc99df01da571031a5 <fd9196aad9e5a3845cea17de3405ebc700382142

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.10; version=d98dfad35c38c037b37c4adc99df01da571031a5 <64fa9328948ddcc0f7f3c23ea1756c126d9dffac; version=d98dfad35c38c037b37c4adc99df01da571031a5 <a2d1c819348b36fccbbfcf37c5fa7a50a9b4528f; version=d98dfad35c38c037b37c4adc99df01da571031a5 <a7232f68c43ca62f545049b7f5fbfc75137b843b; version=d98dfad35c38c037b37c4adc99df01da571031a5 <ae25cf2ea9ebd06d7ad416647dbdc7b5d0172946; version=d98dfad35c38c037b37c4adc99df01da571031a5 <c603b6c6840ac0c6285f5eefea0de6242710af21; version=d98dfad35c38c037b37c4adc99df01da571031a5 <eb3cd9bb590460c6127145cb245be925d23f5232; version=d98dfad35c38c037b37c4adc99df01da571031a5 <ee4799becf7d2af3778007e22c2e55c4009a49c7; version=d98dfad35c38c037b37c4adc99df01da571031a5 <fd9196aad9e5a3845cea17de3405ebc700382142

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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-824Access of Uninitialized Pointer
T1005Data from Local System

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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