CVE-2026-64481: ALSA: hda/cs35l41: Fix firmware load work teardown
In the Linux kernel, the following vulnerability has been resolved:
ALSA: hda/cs35l41: Fix firmware load work teardown
cs35l41hda creates ALSA controls whose private data points at the cs35l41hda object. The firmware load control can also queue fwloadwork.
Those controls are not removed on component unbind, and device remove only cancels fwloadwork through cs35l41removedsp(). That helper is skipped when haloinitialized is false. With firmwareautostart disabled, a firmware load can be requested before the DSP has been initialized. If the component or device is removed before the queued work runs, the worker can run after teardown and dereference driver state that is no longer valid.
Track the created controls and remove them on unbind so no new control callback can reach the driver data or queue more work. Then cancel fwloadwork to drain any request that was already queued. Also cancel the work unconditionally during device remove before runtime PM teardown.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.12.100-1 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 7.1.4-1 - Upgrade
Upgrade
debian/linux-6.12to a version that resolves this vulnerability.Fixed in 6.12.100-1~deb12u1 - Upgrade
Upgrade
linux/Kernelto a version that resolves this vulnerability.Fixed in 6.1.191 - Upgrade
Upgrade
linux/Kernelto a version that resolves this vulnerability.Fixed in 6.6.160 - Upgrade
Upgrade
linux/Kernelto a version that resolves this vulnerability.Fixed in 6.12.97 - Upgrade
Upgrade
linux/Kernelto a version that resolves this vulnerability.Fixed in 6.18.39 - Upgrade
Upgrade
linux/Kernelto a version that resolves this vulnerability.Fixed in 7.1.4 - Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.12.107-1Fixed in 6.12.115-2Fixed in 7.2.12-1Fixed in 7.2.15-1 - Upgrade
Upgrade
debian/linux-6.12to a version that resolves this vulnerability.Fixed in 6.12.113-1~deb12u1 - Compensating control
In cs35l41_hda, track the ALSA controls created for the component and remove them during component unbind so no new control callback can access driver state or queue fw_load_work.
- Compensating control
Cancel fw_load_work unconditionally during device removal, before runtime PM teardown, to drain queued firmware-load requests before driver state becomes invalid.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-64481?
CVE-2026-64481 has a severity rating of high with a CVSS score of 7.8.
How do I fix CVE-2026-64481?
To fix CVE-2026-64481, update to the latest version of the Linux kernel that contains the patch for this vulnerability.
What systems are affected by CVE-2026-64481?
CVE-2026-64481 affects systems running the Linux kernel with the ALSA hda/cs35l41 driver.
What type of vulnerability is CVE-2026-64481?
CVE-2026-64481 is a vulnerability related to the improper teardown of firmware load work in the ALSA subsystem of the Linux kernel.
Who is responsible for addressing CVE-2026-64481?
Linux kernel maintainers are responsible for addressing CVE-2026-64481 by releasing patches and updates.