CVE-2026-99089

Kernel warnings via unbalanced runtime clock disabling

Published Oct 26, 2026 · Updated Oct 26, 2026

Clock imbalance in Linux Samsung I2S triggers a kernel warning during runtime suspend on systems such as Exynos5250 Arndale. samsung_i2s_probe assigns op_clk without enabling it, but i2s_runtime_suspend disables both clocks, unbalancing their enable counts. Exposure requires the affected driver and hardware clock configuration; the published evidence establishes a boot warning, not an attacker-controlled crash or compromise.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Nov 1, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Clock imbalance in Linux Samsung I2S triggers a kernel warning during runtime suspend on systems such as Exynos5250 Arndale. samsung_i2s_probe assigns op_clk without enabling it, but i2s_runtime_suspend disables both clocks, unbalancing their enable counts. Exposure requires the affected driver and hardware clock configuration; the published evidence establishes a boot warning, not an attacker-controlled crash or compromise.

The record

CVE
CVE-2026-99089
Published
Oct 26, 2026
Updated
Oct 26, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 26, 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=4.17
  2. Affected versionversion=48279c53fd1d09dc0d1b6ebb9f21732c507cea0b <2c64c30d493d82d5edc95811cede0083e1195822
  3. Affected versionversion=48279c53fd1d09dc0d1b6ebb9f21732c507cea0b <5dac6bf09b5a4fff2433629801309c3884c3e94a
  4. Affected versionversion=48279c53fd1d09dc0d1b6ebb9f21732c507cea0b <64bb35079dcbc67901da1fe8c52c234cbcd17df3
  5. Affected versionversion=48279c53fd1d09dc0d1b6ebb9f21732c507cea0b <7529254014764ae0b8c33d5c61a58f36c65b1a1c
  6. Affected versionversion=48279c53fd1d09dc0d1b6ebb9f21732c507cea0b <a728c12f8bd89947894e227d0f4f83a895ac9ab7

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=4.17; version=48279c53fd1d09dc0d1b6ebb9f21732c507cea0b <2c64c30d493d82d5edc95811cede0083e1195822; version=48279c53fd1d09dc0d1b6ebb9f21732c507cea0b <5dac6bf09b5a4fff2433629801309c3884c3e94a; version=48279c53fd1d09dc0d1b6ebb9f21732c507cea0b <64bb35079dcbc67901da1fe8c52c234cbcd17df3; version=48279c53fd1d09dc0d1b6ebb9f21732c507cea0b <7529254014764ae0b8c33d5c61a58f36c65b1a1c; version=48279c53fd1d09dc0d1b6ebb9f21732c507cea0b <a728c12f8bd89947894e227d0f4f83a895ac9ab7

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)
VectorUnavailable
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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Your stack

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