CVE-2026-64243 (CVSS 7.1)

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.

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CVSS v3.1 Score

7.1

HIGH

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

EPSS — Exploit Prediction

0.0012

Probability of exploitation

0.02%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/05ef77f02607a3dc5d7f9762cb990f76843315d4 https://git.kernel.org/stable/c/164dcbec9632ca93ae313e6da6e4e05584fa0f02 https://git.kernel.org/stable/c/2ff3ac6f7664fe5639cad01712ac5e021fa7939c https://git.kernel.org/stable/c/5fe860af8630cf7c78523cbd68e5a234743585aa https://git.kernel.org/stable/c/6fb653b62f169f6050fac45b56bf21ad097e19f6 https://git.kernel.org/stable/c/d8cc3e747b002a8b965c529de79c0654675b9a1a https://git.kernel.org/stable/c/f63ad68e18d774a5d15cd7e405ead63f6b322679

Frequently Asked Questions

What is CVE-2026-64243? +

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. It has a CVSS v3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-64243? +

CVE-2026-64243 has a CVSS v3.1 score of 7.1 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0012, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-64243? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-64243