Bug 2338844 (CVE-2024-57911)

Summary: CVE-2024-57911 kernel: iio: dummy: iio_simply_dummy_buffer: fix information leak in triggered buffer
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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Description OSIDB Bzimport 2025-01-19 12:01:49 UTC 
In the Linux kernel, the following vulnerability has been resolved:

iio: dummy: iio_simply_dummy_buffer: fix information leak in triggered buffer

The 'data' array is allocated via kmalloc() and it is used to push data
to user space from a triggered buffer, but it does not set values for
inactive channels, as it only uses iio_for_each_active_channel()
to assign new values.

Use kzalloc for the memory allocation to avoid pushing uninitialized
information to userspace.
Comment 1 Avinash Hanwate 2025-01-20 05:37:19 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025011939-CVE-2024-57911-0e13@gregkh/T