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Review reviewHigh

CVE-2026-64243

Linux

In the Linux kernel, the following vulnerability has been resolved: ASoC: codecs: simple-mux: Fix enum control bounds check simple_mux_control_put() rejects values greater than e->items, but enum control values are zero based. For the two-entry mux used by this driver, valid values are 0 and 1, so value 2 must be rejected as well. Accepting e->items can store an invalid mux state, pass it to the GPIO setter, and pass it on to the DAPM mux update path where it is used as an index into the enum text array. Use the same >= e->items check used by the ASoC enum helpers.

CVSS
7.1
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: ASoC: codecs: simple-mux: Fix enum control bounds check simple_mux_control_put() rejects values greater than e->items, but enum control values are zero based. For the two-entry mux used by this driver, valid values are 0 and 1, so value 2 must be rejected as well. Accepting e->items can store an invalid mux state, pass it to the GPIO setter, and pass it on to the DAPM mux update path where it is used as an index into the enum text array. Use the same >= e->items check used by the ASoC enum helpers.

Affected product and versions

Product
Linux
Affected versions
>= 342fbb7578d1741ff646d7b08e14e8753267b9fa < 6fb653b62f169f6050fac45b56bf21ad097e19f6, >= 342fbb7578d1741ff646d7b08e14e8753267b9fa < d8cc3e747b002a8b965c529de79c0654675b9a1a, >= 342fbb7578d1741ff646d7b08e14e8753267b9fa < 5fe860af8630cf7c78523cbd68e5a234743585aa, >= 342fbb7578d1741ff646d7b08e14e8753267b9fa < 2ff3ac6f7664fe5639cad01712ac5e021fa7939c, >= 342fbb7578d1741ff646d7b08e14e8753267b9fa < 164dcbec9632ca93ae313e6da6e4e05584fa0f02, >= 342fbb7578d1741ff646d7b08e14e8753267b9fa < 05ef77f02607a3dc5d7f9762cb990f76843315d4, >= 342fbb7578d1741ff646d7b08e14e8753267b9fa < f63ad68e18d774a5d15cd7e405ead63f6b322679, >= 5.11
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE
Not available
CVE-2026-64243 — Linux | SECUFOCUS NOW