CVE-2026-64481

Local use-after-free via queued firmware work

Published Jul 25, 2026 · Updated Jul 25, 2026

Use-after-free in the Linux kernel CS35L41 HDA driver from 6.0 allows local users to dereference freed state during device teardown. The fw_load_work worker remains queued because unbind leaves ALSA controls alive and removal conditionally skips work cancellation. Reachability requires firmware_autostart disabled, a firmware-load request before DSP initialization, and component or device removal before the worker runs.

CVSS severity7.8
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel CS35L41 HDA driver from 6.0 allows local users to dereference freed state during device teardown. The fw_load_work worker remains queued because unbind leaves ALSA controls alive and removal conditionally skips work cancellation. Reachability requires firmware_autostart disabled, a firmware-load request before DSP initialization, and component or device removal before the worker runs.

The record

CVE
CVE-2026-64481
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8 <8947215c0136c9d905e4a46d824824f8b48a2e5b
  2. Affected versionversion=47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8 <b65020d5398f499c09498c9786dba6d67ae57664
  3. Affected versionversion=47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8 <ce0a903d0591e3e2c790c5b628802b08d1b287cc
  4. Affected versionversion=47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8 <d6a40a4d083ef74d00c8f9516cb5ff07ac70720b
  5. Affected versionversion=6.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8 <8947215c0136c9d905e4a46d824824f8b48a2e5b; version=47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8 <b65020d5398f499c09498c9786dba6d67ae57664; version=47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8 <ce0a903d0591e3e2c790c5b628802b08d1b287cc; version=47ceabd99a28399f8971f4ca0a37ebc0a21dd2a8 <d6a40a4d083ef74d00c8f9516cb5ff07ac70720b; version=6.0

Published CVSS scores

7.8kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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