CVE-2026-68346

Service interruption via malformed ACPI mute response

Published Aug 10, 2026 · Updated Aug 10, 2026

Improper input validation in Linux kernel 6.7 allows local users to interrupt service via a malformed ACPI _DSM mute response. cs35l41_get_acpi_mute_state() neither validates the returned object's buffer type and length before dereferencing its first byte nor frees the caller-owned object after successful queries. Reachability requires Cirrus Logic cs35l41 speaker hardware on an HDA ACPI platform and a malformed firmware response; systems without that codec hardware are unaffected.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in Linux kernel 6.7 allows local users to interrupt service via a malformed ACPI _DSM mute response. cs35l41_get_acpi_mute_state() neither validates the returned object's buffer type and length before dereferencing its first byte nor frees the caller-owned object after successful queries. Reachability requires Cirrus Logic cs35l41 speaker hardware on an HDA ACPI platform and a malformed firmware response; systems without that codec hardware are unaffected.

The record

CVE
CVE-2026-68346
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=447106e92a0c86c332d40710436f38f64c322cd6 <08433c71f15984ddd5f5a307cf3f0aa9b84583aa
  2. Affected versionversion=447106e92a0c86c332d40710436f38f64c322cd6 <3b597d24dc0455ae926f1053f97c2725038fc3cd
  3. Affected versionversion=447106e92a0c86c332d40710436f38f64c322cd6 <7fea0c89ed39a13d9a31163a74f8c62de30a4ffc
  4. Affected versionversion=447106e92a0c86c332d40710436f38f64c322cd6 <d5dfdf43259ad9d054052012095b1630e7366dcf
  5. Affected versionversion=6.7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=447106e92a0c86c332d40710436f38f64c322cd6 <08433c71f15984ddd5f5a307cf3f0aa9b84583aa; version=447106e92a0c86c332d40710436f38f64c322cd6 <3b597d24dc0455ae926f1053f97c2725038fc3cd; version=447106e92a0c86c332d40710436f38f64c322cd6 <7fea0c89ed39a13d9a31163a74f8c62de30a4ffc; version=447106e92a0c86c332d40710436f38f64c322cd6 <d5dfdf43259ad9d054052012095b1630e7366dcf; version=6.7

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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

CWE-476NULL Pointer Dereference

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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