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Vulnerability record · CVE-2026-98093 · published 25 September 2026

CVE-2026-98093: Linux kernel improper resource shutdown vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: ASoC: fsl_micfil: balance mclk enable/disable hw_params() enables mclk unconditionally and hw_free() disables it unconditionally, but the PCM core does not guarantee 1:1 pairing: hw_free() can run without hw_params(), and hw_params() can be called multiple times from the SETUP state. This triggers an "already disabled" WARN() in the first case and leaks an enable reference in the second, leaving the clock ungateable. Guard both sides with the existing mclk_flag, as fsl_sai.c does with mclk_streams.

7.8 CVSS 3.1 High EPSS 0.13% · top 97.6% CWE-404 · Improper resource shutdown
7.8CVSS 3.1 base score
0.13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
23 Oct 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: ASoC: fsl_micfil: balance mclk enable/disable hw_params() enables mclk unconditionally and hw_free() disables it unconditionally, but the PCM core does not guarantee 1:1 pairing: hw_free() can run without hw_params(), and hw_params() can be called multiple times from the SETUP state. This triggers an "already disabled" WARN() in the first case and leaks an enable reference in the second, leaving the clock ungateable. Guard both sides with the existing mclk_flag, as fsl_sai.c does with mclk_streams.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/470db2026a435b79f7ecb4d65523ea16a99d55d8 Patch
https://git.kernel.org/stable/c/d3dbccfe6afa7b9a6a7ed65cfaa76a47fa050a56 Patch
https://git.kernel.org/stable/c/fa1bbe3534499dd89d3b0b941d6dd4ddb70c31b5 Patch

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Source: NIST National Vulnerability Database (record CVE-2026-98093), CISA KEV, FIRST EPSS (scores of 2026-11-11). This page is refreshed as NVD updates the record.