CVE-2025-38078 Information

Jun 19, 2025 cve

Description

In the Linux kernel the following vulnerability has been resolved:

ALSA: pcm: Fix race of buffer access at PCM OSS layer

The PCM OSS layer tries to clear the buffer with the silence data at initialization (or reconfiguration) of a stream with the explicit call of snd_pcm_format_set_silence() with runtime->dma_area. But this may lead to a UAF because the accessed runtime->dma_area might be freed concurrently as it’s performed outside the PCM ops.

For avoiding it move the code into the PCM core and perform it inside the buffer access lock so that it won’t be changed during the operation.

Reference

https://git.kernel.org/stable/c/10217da9644ae75cea7330f902c35fc5ba78bbbf https://git.kernel.org/stable/c/74d90875f3d43f3eff0e9861c4701418795d3455 https://git.kernel.org/stable/c/8170d8ec4efd0be352c14cb61f374e30fb0c2a25 https://git.kernel.org/stable/c/93a81ca0657758b607c3f4ba889ae806be9beb73 https://git.kernel.org/stable/c/afa56c960fcb4db37f2e3399f28e9402e4e1f470 https://git.kernel.org/stable/c/bf85e49aaf3a3c5775ea87369ea5f159c2148db4 https://git.kernel.org/stable/c/c0e05a76fc727929524ef24a19c302e6dd40233f https://git.kernel.org/stable/c/f3e14d706ec18faf19f5a6e75060e140fea05d4a

CNNVD-202506-2213 (Published: 2025-06-18)

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