CVE-2026-64023

Local kernel memory corruption via GPIO cleanup race

Published Jul 19, 2026 · Updated Jul 19, 2026

Use-after-free in the Linux kernel GPIO aggregator allows local users to corrupt kernel memory through a concurrent lookup. An error path frees lookups->dev_id before removing its lookup-table entry, allowing gpiod_find() to pass the freed string to strcmp(). Reachability requires local permission to create or activate a GPIO aggregator; the invalid access can crash the kernel, while reliable privilege escalation is not publicly documented.

CVSS severity7.8
High
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

Use-after-free in the Linux kernel GPIO aggregator allows local users to corrupt kernel memory through a concurrent lookup. An error path frees lookups->dev_id before removing its lookup-table entry, allowing gpiod_find() to pass the freed string to strcmp(). Reachability requires local permission to create or activate a GPIO aggregator; the invalid access can crash the kernel, while reliable privilege escalation is not publicly documented.

The record

CVE
CVE-2026-64023
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
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=6.16
  2. Affected versionversion=86f162e73d2d81ef6d819c06a3b6c2fda77a79b8 <30c073cab97afb31901f94de9605177b6b84367e
  3. Affected versionversion=86f162e73d2d81ef6d819c06a3b6c2fda77a79b8 <7ac4183a41ba048af89eddd82fe8be64619d0871
  4. Affected versionversion=86f162e73d2d81ef6d819c06a3b6c2fda77a79b8 <ea28b286649b70618e9dd3e895812417a7712a11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.16; version=86f162e73d2d81ef6d819c06a3b6c2fda77a79b8 <30c073cab97afb31901f94de9605177b6b84367e; version=86f162e73d2d81ef6d819c06a3b6c2fda77a79b8 <7ac4183a41ba048af89eddd82fe8be64619d0871; version=86f162e73d2d81ef6d819c06a3b6c2fda77a79b8 <ea28b286649b70618e9dd3e895812417a7712a11

Published CVSS scores

7.8LinuxCVSS: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

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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