Go to homepageCyberStrike

Menu

Star on GitHub · 3.2k
Sign inDownload

CVE-2026-43279

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Add sanity check for OOB writes at silencing At silencing the playback URB packets in the implicit fb mode bef…

Published May 6, 2026CWE-787EPSS 0.12%

Overview

CVE-2026-43279 is a high-severity vulnerability. It was published on May 6, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

ALSA: usb-audio: Add sanity check for OOB writes at silencing

At silencing the playback URB packets in the implicit fb mode before

the actual playback, we blindly assume that the received packets fit

with the buffer size. But when the setup in the capture stream

differs from the playback stream (e.g. due to the USB core limitation

of max packet size), such an inconsistency may lead to OOB writes to

the buffer, resulting in a crash.

For addressing it, add a sanity check of the transfer buffer size at

prepare_silent_urb(), and stop the data copy if the received data

overflows. Also, report back the transfer error properly from there,

too.

Note that this doesn't fix the root cause of the playback error

itself, but this merely covers the kernel Oops.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/6af16f1b8649df4c00d6ced924bdd8b72c885b6aRefgit.kernel.org/stable/c/780dc57794a217b49994fa1d0b42465fb10a00aaRefgit.kernel.org/stable/c/8995fc0e00b3fee9bf7ecb3d836b635b730c1049Refgit.kernel.org/stable/c/ccaf9296763be4f76b59e2cac377006016c34435Refgit.kernel.org/stable/c/fa01973bb79d70c4736b6a4b2de99fbb2cbc8d1fRefgit.kernel.org/stable/c/fba2105a157fffcf19825e4eea498346738c9948Refgit.kernel.org/stable/c/fc9e5af60dc199051dc202ae78e1fe76a9977a5e

How CyberStrike helps

Frequently asked questions

What is CVE-2026-43279?

CVE-2026-43279 is a high-severity vulnerability. It was published on May 6, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-43279?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-43279?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-43279?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-43279 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

Related HIGH CVEs from 2026

View all
Browse by year2026202520242023202220212020201920182017201620152014201320122011201020092008200720062005200420032002200120001999