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

ALSA: hda/cs35l41: Fix firmware load work teardown

cs35l41_hda creates ALSA controls whose private data points at the
cs35l41_hda object. The firmware load control can also queue
fw_load_work.

Those controls are not removed on component unbind, and device remove
only cancels fw_load_work through cs35l41_remove_dsp(). That helper is
skipped when halo_initialized is false. With firmware_autostart
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state that is no longer valid.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
fw_load_work to drain any request that was already queued. Also cancel
the work unconditionally during device remove before runtime PM teardown.
Published: 2026-07-25
Score: 7.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Impact

The flaw is a use‑after‑free in the ALSA hda/cs35l41 driver. Firmware load work can be queued even before the device is fully initialized; if the device or its component is removed before the deferred work runs, the worker may execute after the driver has been torn down and dereference freed state. This results in a kernel crash, producing a denial‑of‑service rather than arbitrary code execution.

Affected Systems

All Linux kernel builds that contain the hda/cs35l41 driver are impacted. The vulnerability was fixed in the latest kernel releases; any kernel compiled with this driver before the patch remains susceptible. Users of older kernels should treat this as a risk until an update is applied.

Risk and Exploitability

The EPSS score is below 1 % and the CVE is not listed in CISA KEV, suggesting that exploitation is unlikely. Based on the description, it is inferred that a local attacker would need the ability to trigger firmware load via ALSA controls while the device is being removed, which imposes restrictive conditions. The CVSS score of 7.8 indicates a severe impact when those conditions are met. Overall risk can be considered low to moderate, but rapid patching is advised.

Generated by OpenCVE AI on August 3, 2026 at 18:32 UTC.

Remediation

No vendor fix or workaround currently provided.

OpenCVE Recommended Actions

  • Apply a kernel update that includes the hda/cs35l41 driver fix.
  • Disable or avoid triggering firmware load ALSA controls during device removal or when the driver is not updated.
  • Monitor system logs for kernel panics related to the cs35l41 driver and apply the security update promptly.

Generated by OpenCVE AI on August 3, 2026 at 18:32 UTC.

Tracking

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Advisories
Source ID Title
Debian DLA Debian DLA DLA-4724-1 linux-6.12 new package
Debian DSA Debian DSA DSA-6405-1 linux security update
History

Sun, 02 Aug 2026 12:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Wed, 29 Jul 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-825
References
Metrics threat_severity

None

 threat_severity

Moderate

Tue, 28 Jul 2026 16:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-416

Mon, 27 Jul 2026 05:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Sat, 25 Jul 2026 09:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: ALSA: hda/cs35l41: Fix firmware load work teardown cs35l41_hda creates ALSA controls whose private data points at the cs35l41_hda object. The firmware load control can also queue fw_load_work. Those controls are not removed on component unbind, and device remove only cancels fw_load_work through cs35l41_remove_dsp(). That helper is skipped when halo_initialized is false. With firmware_autostart 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 fw_load_work to drain any request that was already queued. Also cancel the work unconditionally during device remove before runtime PM teardown.
Title ALSA: hda/cs35l41: Fix firmware load work teardown
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-08-05T12:42:24.849Z

Reserved: 2026-07-19T15:36:31.791Z

Link: CVE-2026-64481

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-07-25T10:17:33.733

Modified: 2026-07-27T05:16:54.210

Link: CVE-2026-64481

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-07-25T00:00:00Z

Links: CVE-2026-64481 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-08-03T18:45:17Z

Weaknesses
  • CWE-825

    Expired Pointer Dereference