CVE-2025-38078: debian linux — Fix

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.

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CVSS v3.1 Score

4.7

MEDIUM

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-362 CWE-362

Affected Products

Vendor	Product	Versions
linux	linux_kernel	< 5.4.294
linux	linux_kernel	5.5 — 5.10.238
linux	linux_kernel	5.11 — 5.15.185
linux	linux_kernel	5.16 — 6.1.141
linux	linux_kernel	6.2 — 6.6.93
linux	linux_kernel	6.7 — 6.12.31
linux	linux_kernel	6.13 — 6.14.9
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
debian	debian_linux	All

References

Advisories & Patches

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

Other References

https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html

Frequently Asked Questions

What is 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 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. It has a CVSS v3.1 base score of 4.7 (MEDIUM).

How severe is CVE-2025-38078? +

CVE-2025-38078 has a CVSS v3.1 score of 4.7 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-38078? +

CVE-2025-38078 affects products from debian, linux, specifically: debian_linux, linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-38078? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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