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high7.8

CVE-2025-38078

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 …

Impact

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.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
before 5.4.294
from 5.5 before 5.10.238
from 5.11 before 5.15.185
from 5.16 before 6.1.141
from 6.2 before 6.6.93
from 6.7 before 6.12.31
DebianDebian Linux
Version 11.0

Weakness classification

CWE-362

References