Copyright © 2012 Red Hat, Inc. All rights reserved. Low 2026-09-11T00:00:00 kernel: ALSA: pcxhr: initialize mutexes before requesting threaded IRQ 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CWE-909

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcxhr: initialize mutexes before requesting threaded IRQ pcxhr_probe() requests pcxhr_threaded_irq() before initializing mgr->lock, even though the threaded handler takes that mutex. Initialize the manager locks before request_threaded_irq() so an early interrupt cannot run against uninitialized mutex state during probe.

A flaw was found in the ALSA pcxhr driver within the Linux kernel. The `pcxhr_probe()` function requests a threaded interrupt before properly initializing a critical mutex (`mgr->lock`). This oversight could allow an early interrupt to operate on an uninitialized mutex, potentially leading to system instability or a denial of service (DoS) condition. A local attacker could potentially exploit this to impact system availability.

Red Hat Enterprise Linux 10 Fix deferred kernel Red Hat Enterprise Linux 10 Fix deferred kernel-rt Red Hat Enterprise Linux 6 Out of support scope kernel Red Hat Enterprise Linux 7 Fix deferred kernel Red Hat Enterprise Linux 7 Fix deferred kernel-rt Red Hat Enterprise Linux 8 Fix deferred kernel Red Hat Enterprise Linux 8 Fix deferred kernel-rt Red Hat Enterprise Linux 9 Fix deferred kernel Red Hat Enterprise Linux 9 Fix deferred kernel-rt Red Hat OpenShift Container Platform 4 Fix deferred openshift/ose-rhel-coreos-8 Red Hat OpenShift Container Platform 4 Fix deferred openshift/ose-rhel-coreos-9 https://www.cve.org/CVERecord?id=CVE-2026-80967 https://nvd.nist.gov/vuln/detail/CVE-2026-80967 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-80967.mbox