CVE-2026-64023

Analyzed Analyzed - Analysis Complete

GPIO Aggregator Use-After-Free in Linux Kernel

Publication date: 2026-07-19

Last updated on: 2026-10-13

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: gpio: aggregator: fix a potential use-after-free On error we free aggr->lookups->dev_id before removing the entry from the lookup table. If a concurrent thread calls gpiod_find() before we remove the entry, it could iterate over the list and call gpiod_match_lookup_table() which unconditionally dereferences dev_id when calling strcmp(). Reverse the order of cleanup.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-07-19

Last Modified

2026-10-13

Generated

2026-10-19

AI Q&A

2026-07-19

EPSS Evaluated

2026-10-18

NVD

CVE-2026-64023

EUVD

EUVD-2026-45596

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	From 6.19 (inc) to 7.0.11 (exc)
linux	linux_kernel	From 6.16 (inc) to 6.18.34 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This vulnerability in the Linux kernel involves a use-after-free issue in the GPIO aggregator module. When an error occurs, the cleanup process frees a device identifier before removing the entry from the lookup table. If another thread accesses the table concurrently, it may dereference the freed memory, leading to potential crashes or unexpected behavior.

Detection Guidance

This vulnerability is specific to the Linux kernel's GPIO aggregator module and may not have direct network detection methods. Check kernel logs for errors related to gpio or aggregator with commands like dmesg | grep -i gpio or journalctl -k | grep -i gpio. If you suspect exploitation, monitor for unexpected process crashes or system instability.

Impact Analysis

This vulnerability could cause system instability, crashes, or unexpected behavior if exploited. It may lead to privilege escalation or denial-of-service conditions on affected Linux systems using the GPIO aggregator feature.

Compliance Impact

This vulnerability does not directly affect compliance with standards like GDPR or HIPAA as it is a low-level kernel issue involving a potential use-after-free in GPIO aggregator functionality. No evidence suggests it impacts data protection or privacy requirements.

Mitigation Strategies

Update your Linux kernel to the latest stable version that includes the fix for this issue. If immediate patching is not possible, disable the GPIO aggregator module by running modprobe -r gpio_aggregator as a temporary workaround. Monitor vendor advisories for kernel updates.

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