Bug 2467191 (CVE-2026-43138)

Summary: CVE-2026-43138 kernel: reset: gpio: suppress bind attributes in sysfs
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
A flaw was found in the Linux kernel. A local user could exploit a vulnerability in the GPIO (General Purpose Input/Output) reset controller by unbinding a dynamically created device through the sysfs (a virtual filesystem providing an interface to kernel data structures) interface. This improper handling of device unbinding can lead to a use-after-free condition, which may result in system instability or a denial of service.
 Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-05-06 13:09:52 UTC 
In the Linux kernel, the following vulnerability has been resolved:

reset: gpio: suppress bind attributes in sysfs

This is a special device that's created dynamically and is supposed to
stay in memory forever. We also currently don't have a devlink between
it and the actual reset consumer. Suppress sysfs bind attributes so that
user-space can't unbind the device because - as of now - it will cause a
use-after-free splat from any user that puts the reset control handle.
Comment 1 Keith Grant 2026-05-06 18:20:46 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026050624-CVE-2026-43138-ccd2@gregkh/T