CVE-2026-64084

Kernel stack corruption via oversized PDIO scan

Published Jul 19, 2026 · Updated Jul 19, 2026

Out-of-bounds access in the Linux Kernel ADM1266 driver allows local users to disclose or corrupt kernel stack memory via a GPIO ioctl. The adm1266_gpio_get_multiple function uses PMBus command code ADM1266_PDIO_STATUS as a bit-count bound, scanning 242 positions in arrays sized for 25 and writing beyond the output array when stray stack bits are set. Reachability requires an ADM1266 device and permission to open its GPIO character device; exploitation can disclose stack data, crash the kernel, or enable local privilege escalation.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds access in the Linux Kernel ADM1266 driver allows local users to disclose or corrupt kernel stack memory via a GPIO ioctl. The adm1266_gpio_get_multiple function uses PMBus command code ADM1266_PDIO_STATUS as a bit-count bound, scanning 242 positions in arrays sized for 25 and writing beyond the output array when stray stack bits are set. Reachability requires an ADM1266 device and permission to open its GPIO character device; exploitation can disclose stack data, crash the kernel, or enable local privilege escalation.

The record

CVE
CVE-2026-64084
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-125, T1068
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 <17cee2f59029039416e8f6303050038eb59ba149
  3. Affected versionversion=d98dfad35c38c037b37c4adc99df01da571031a5 <299efd14c2eda7e5fd40025e54addd4151a01081
  4. Affected versionversion=d98dfad35c38c037b37c4adc99df01da571031a5 <2aef8f08c479f4cbc83e1e6b19d1c94d4dd24f17
  5. Affected versionversion=d98dfad35c38c037b37c4adc99df01da571031a5 <4d1da9a6be5a8156c532d571c2ed237169f99244
  6. Affected versionversion=d98dfad35c38c037b37c4adc99df01da571031a5 <b96c7f0bc0713dc6403912f6527d4ff9168d6fe6
  7. Affected versionversion=d98dfad35c38c037b37c4adc99df01da571031a5 <d0593e15fdeb56048a72c5c6e720f702759d0ccd
  8. Affected versionversion=d98dfad35c38c037b37c4adc99df01da571031a5 <d7834d92251baade796812876e95555e2066fa9f
  9. Affected versionversion=d98dfad35c38c037b37c4adc99df01da571031a5 <fa7ca363069a70b0d1aa51e8892e3095fe2ac1ec

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.10; version=d98dfad35c38c037b37c4adc99df01da571031a5 <17cee2f59029039416e8f6303050038eb59ba149; version=d98dfad35c38c037b37c4adc99df01da571031a5 <299efd14c2eda7e5fd40025e54addd4151a01081; version=d98dfad35c38c037b37c4adc99df01da571031a5 <2aef8f08c479f4cbc83e1e6b19d1c94d4dd24f17; version=d98dfad35c38c037b37c4adc99df01da571031a5 <4d1da9a6be5a8156c532d571c2ed237169f99244; version=d98dfad35c38c037b37c4adc99df01da571031a5 <b96c7f0bc0713dc6403912f6527d4ff9168d6fe6; version=d98dfad35c38c037b37c4adc99df01da571031a5 <d0593e15fdeb56048a72c5c6e720f702759d0ccd; version=d98dfad35c38c037b37c4adc99df01da571031a5 <d7834d92251baade796812876e95555e2066fa9f; version=d98dfad35c38c037b37c4adc99df01da571031a5 <fa7ca363069a70b0d1aa51e8892e3095fe2ac1ec

Published CVSS scores

7.8GitHub Advisory DatabaseCVSS:3.1/AV:L/AC:L/PR:L/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
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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