CVE-2026-98093Hinoki check available

Clock reference leak via unbalanced PCM callbacks

Published Sep 25, 2026 · Updated Sep 25, 2026

Resource-management flaw in Linux 6.13 allows local users to leave the fsl_micfil master clock enabled through PCM state transitions. fsl_micfil_hw_params enables mclk on every call, while fsl_micfil_hw_free disables it without ensuring that the callbacks are paired. Triggering the imbalance requires access to PCM operations on a system using the MICFIL driver; repeated setup leaks an enable reference, while an unmatched free raises a kernel warning.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Oct 20, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Resource-management flaw in Linux 6.13 allows local users to leave the fsl_micfil master clock enabled through PCM state transitions. fsl_micfil_hw_params enables mclk on every call, while fsl_micfil_hw_free disables it without ensuring that the callbacks are paired. Triggering the imbalance requires access to PCM operations on a system using the MICFIL driver; repeated setup leaks an enable reference, while an unmatched free raises a kernel warning.

The record

CVE
CVE-2026-98093
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.13
  2. Affected versionversion=b47024dc624bcffb89d238f4a5b490363cea2a1e <470db2026a435b79f7ecb4d65523ea16a99d55d8
  3. Affected versionversion=b47024dc624bcffb89d238f4a5b490363cea2a1e <d3dbccfe6afa7b9a6a7ed65cfaa76a47fa050a56
  4. Affected versionversion=b47024dc624bcffb89d238f4a5b490363cea2a1e <fa1bbe3534499dd89d3b0b941d6dd4ddb70c31b5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.13; version=b47024dc624bcffb89d238f4a5b490363cea2a1e <470db2026a435b79f7ecb4d65523ea16a99d55d8; version=b47024dc624bcffb89d238f4a5b490363cea2a1e <d3dbccfe6afa7b9a6a7ed65cfaa76a47fa050a56; version=b47024dc624bcffb89d238f4a5b490363cea2a1e <fa1bbe3534499dd89d3b0b941d6dd4ddb70c31b5

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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