CVE-2026-64023 Details
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.
A use-after-free vulnerability has been identified in the Linux kernel's GPIO aggregator component. This issue arises because the code frees a lookup entry's device ID before removing the entry from the lookup table. If a concurrent thread invokes the 'gpiod_find()' function before the entry is removed, it could traverse the list and call 'gpiod_match_lookup_table()', which improperly dereferences the device ID using 'strcmp()'. The vulnerability affects the Linux kernel stable tree.
The vulnerability has been addressed by reversing the order of the cleanup process, ensuring that the lookup table entry is removed before freeing the 'dev_id'. Users should upgrade to the latest version of the Linux kernel where this fix has been applied.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/30c073cab97afb31901f94de9605177b6b84367e | kernel.org | Patch |
| https://git.kernel.org/stable/c/7ac4183a41ba048af89eddd82fe8be64619d0871 | kernel.org | Patch |
| https://git.kernel.org/stable/c/ea28b286649b70618e9dd3e895812417a7712a11 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 6.16, < 6.18.34 >= 6.19, < 7.0.11 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 13, 2026 | Initial Analysis | [email protected] |
| Jul 20, 2026 | CVE Modified | kernel.org |
| Jul 19, 2026 | New CVE Received | kernel.org |