CVE-2026-64243 Details
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.
A vulnerability exists in the Linux kernel's ASoC (ALSA System on Chip) codecs, specifically within the simple-mux control. The issue arises because the simple_mux_control_put() function does not properly validate enum control values against the expected range. Enum values are zero-based, meaning for a mux with two entries, only values 0 and 1 are valid. The current implementation allows value 2, which is out of bounds, to be accepted. This oversight can lead to an invalid mux state being stored, passed to the GPIO setter, and subsequently used in the DAPM (Dynamic Audio Power Management) mux update path as an index into the enum text array, potentially causing unexpected behavior.
The vulnerability has been addressed in the official Linux Git repository. Users should upgrade to the latest version of the Linux kernel where this fix is applied.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/05ef77f02607a3dc5d7f9762cb990f76843315d4 | kernel.org | Patch |
| https://git.kernel.org/stable/c/164dcbec9632ca93ae313e6da6e4e05584fa0f02 | kernel.org | Patch |
| https://git.kernel.org/stable/c/2ff3ac6f7664fe5639cad01712ac5e021fa7939c | kernel.org | Patch |
| https://git.kernel.org/stable/c/5fe860af8630cf7c78523cbd68e5a234743585aa | kernel.org | Patch |
| https://git.kernel.org/stable/c/6fb653b62f169f6050fac45b56bf21ad097e19f6 | kernel.org | Patch |
| https://git.kernel.org/stable/c/d8cc3e747b002a8b965c529de79c0654675b9a1a | kernel.org | Patch |
| https://git.kernel.org/stable/c/f63ad68e18d774a5d15cd7e405ead63f6b322679 | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-129 | Improper Validation of Array Index | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.11, < 5.15.210 >= 5.16, < 6.1.176 >= 6.2, < 6.6.143 >= 6.7, < 6.12.93 >= 6.13, < 6.18.35 >= 6.19, < 7.0.12 7.1 rc1 7.1 rc2 7.1 rc3 7.1 rc4 7.1 rc5 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 17, 2026 | Initial Analysis | [email protected] |
| Jul 27, 2026 | CVE Modified | kernel.org |
| Jul 24, 2026 | New CVE Received | kernel.org |