CVE-2026-64243: ASoC: codecs: simple-mux: Fix enum control bounds check

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-24 · updated 2026-10-19
Weakness: CWE-129

Description

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 products

Linux kernel: from 5.11 before 5.15.210; from 5.16 before 6.1.176; from 6.2 before 6.6.143; from 6.7 before 6.12.93; from 6.13 before 6.18.35; from 6.19 before 7.0.12 — fixed in 5.15.210, 6.1.176, 6.12.93, 6.18.35, 6.6.143, 7.0.12

How to fix

Upgrade to a fixed version: Linux kernel 5.15.210, 6.1.176, 6.12.93, 6.18.35. Check the vendor advisory for mitigations.

References

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