Out-of-bounds Write The advisory has been revoked - it doesn't affect any version of package kernel-rt-64k-debug-devel-matched (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL9-KERNELRT64KDEBUGDEVELMATCHED-16497424
- published7 May 2026
- disclosed6 May 2026
Introduced: 6 May 2026
CVE-2026-43279 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:9.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-rt-64k-debug-devel-matched package and not the kernel-rt-64k-debug-devel-matched package as distributed by RHEL.
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.
References
- https://access.redhat.com/security/cve/CVE-2026-43279
- https://git.kernel.org/stable/c/6af16f1b8649df4c00d6ced924bdd8b72c885b6a
- https://git.kernel.org/stable/c/780dc57794a217b49994fa1d0b42465fb10a00aa
- https://git.kernel.org/stable/c/8995fc0e00b3fee9bf7ecb3d836b635b730c1049
- https://git.kernel.org/stable/c/ccaf9296763be4f76b59e2cac377006016c34435
- https://git.kernel.org/stable/c/fa01973bb79d70c4736b6a4b2de99fbb2cbc8d1f
- https://git.kernel.org/stable/c/fba2105a157fffcf19825e4eea498346738c9948
- https://git.kernel.org/stable/c/fc9e5af60dc199051dc202ae78e1fe76a9977a5e