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Response snapshot Nov 8, 2026, 22:35 UTC

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VulnerabilityCVE-2026-64243

Linux kernel: ASoC: codecs: simple-mux: Fix enum control bounds check

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.

At a glance

Exploited
Not known
Severity
7.1 High (CVSS 3.1)
Chance of exploitation
0.2% in the next 30 days
Sources
1 source

What to do

Check the vendor advisory for affected versions and fixes.

Read NVD CVE-2026-64243 (opens a new tab)

What happened

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.

Continue reading

Use the same >= e->items check used by the ASoC enum helpers.

Scores and how they were measured

CVSS base severity

7.1

Version 3.1As of

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

0.2%

Scored Percentile 5.2%

Model and measurement source (opens a new tab)

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Related technology

Sources

  1. Primary source

    NVD CVE-2026-64243 (opens a new tab)

    NVD record: description, CVSS (the CNA score is preferred), affected products, and publication date. Not evidence of exploitation.

    Published Checked

  2. Primary source

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

  3. Primary source

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

  4. Primary source

    NVD CVE API 2.0 (opens a new tab)

    The NVD API page that supplied this CVE record.

    Published Date not suppliedChecked

  5. Primary source

    FIRST measured EPSS score (opens a new tab)

    Measured EPSS probability and percentile for CVE-2026-64243, scored 2026-11-08. This is a model estimate, not proof of exposure.

    Published Checked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, November 8). Linux kernel: ASoC: codecs: simple-mux: Fix enum control bounds check (CVE-2026-64243). https://kevwire.com/record/CVE-2026-64243

MLA

"Linux kernel: ASoC: codecs: simple-mux: Fix enum control bounds check (CVE-2026-64243)." KEVWire, 8 Nov. 2026, kevwire.com/record/CVE-2026-64243.

Chicago

KEVWire. "Linux kernel: ASoC: codecs: simple-mux: Fix enum control bounds check (CVE-2026-64243)." Last modified November 8, 2026. https://kevwire.com/record/CVE-2026-64243.

Evidence summary (plain text)

Linux kernel: ASoC: codecs: simple-mux: Fix enum control bounds check (Jul 24, 2026).
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 (version 3.1; evidence as of Nov 8, 2026; https://nvd.nist.gov/vuln/detail/CVE-2026-64243).
EPSS 0.2% for the following 30 days, scored Nov 8, 2026 (https://api.first.org/data/v1/epss?cve=CVE-2026-64243&date=2026-11-08).
Sources:
NVD CVE-2026-64243: https://nvd.nist.gov/vuln/detail/CVE-2026-64243
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-11-08T15:56:13.358Z&lastModEndDate=2026-11-08T17:25:56.467Z&resultsPerPage=500&startIndex=0
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-11-08T15:20:57.540Z&lastModEndDate=2026-11-08T16:55:56.207Z&resultsPerPage=500&startIndex=0
NVD CVE API 2.0: https://services.nvd.nist.gov/rest/json/cves/2.0?lastModStartDate=2026-11-08T14:46:00.078Z&lastModEndDate=2026-11-08T16:20:55.703Z&resultsPerPage=500&startIndex=0
FIRST measured EPSS score: https://api.first.org/data/v1/epss?cve=CVE-2026-64243&date=2026-11-08
Record ID: CVE-2026-64243.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Nov 8, 2026, 20:31 UTC. Ingestion is not an independent editorial investigation.

NVD status: Modified. Publication in the NVD is not evidence of exploitation.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

Record JSON

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Record details

Record detail