Bug 2307888 (CVE-2024-44931)

Summary: CVE-2024-44931 kernel: gpio: prevent potential speculation leaks in gpio_device_get_desc()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Bug Depends On: 2308131    
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Description OSIDB Bzimport 2024-08-26 11:21:50 UTC 
In the Linux kernel, the following vulnerability has been resolved:

gpio: prevent potential speculation leaks in gpio_device_get_desc()

Userspace may trigger a speculative read of an address outside the gpio
descriptor array.
Users can do that by calling gpio_ioctl() with an offset out of range.
Offset is copied from user and then used as an array index to get
the gpio descriptor without sanitization in gpio_device_get_desc().

This change ensures that the offset is sanitized by using
array_index_nospec() to mitigate any possibility of speculative
information leaks.

This bug was discovered and resolved using Coverity Static Analysis
Security Testing (SAST) by Synopsys, Inc.
Comment 1 Mauro Matteo Cascella 2024-08-27 12:05:34 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024082636-CVE-2024-44931-8212@gregkh/T
Comment 3 errata-xmlrpc 2025-05-13 08:27:49 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:6966 https://access.redhat.com/errata/RHSA-2025:6966