CVE-2026-89598

Kernel scheduling faults via atomic-context I2C transfers

Published Sep 11, 2026 · Updated Sep 11, 2026

Concurrency misuse in the Linux ssd1307fb driver allows attackers to trigger kernel scheduling faults via framebuffer activity. The damage callbacks synchronously call ssd1307fb_update_rect, causing a sleeping I2C transfer while fbcon printk handling has preemption disabled. The condition requires the ssd1307fb I2C display path and concurrent console damage; observed consequences include atomic-scheduling and preemption warnings.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Concurrency misuse in the Linux ssd1307fb driver allows attackers to trigger kernel scheduling faults via framebuffer activity. The damage callbacks synchronously call ssd1307fb_update_rect, causing a sleeping I2C transfer while fbcon printk handling has preemption disabled. The condition requires the ssd1307fb I2C display path and concurrent console damage; observed consequences include atomic-scheduling and preemption warnings.

The record

CVE
CVE-2026-89598
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 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=3.8
  2. Affected versionversion=a2ed00da5047806233e288b991d9be997a5eb214 <1981e54ac137f773fb25a7209a42b75213868306
  3. Affected versionversion=a2ed00da5047806233e288b991d9be997a5eb214 <3bcab9b21f71d52bd1b2e03b80f29516bb000593
  4. Affected versionversion=a2ed00da5047806233e288b991d9be997a5eb214 <9ad709afdfa32509ed64938a6d9cd00db3cd54c2
  5. Affected versionversion=a2ed00da5047806233e288b991d9be997a5eb214 <b64f3497a0cd7bbd26d6c268eebd217d8062fcee

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=3.8; version=a2ed00da5047806233e288b991d9be997a5eb214 <1981e54ac137f773fb25a7209a42b75213868306; version=a2ed00da5047806233e288b991d9be997a5eb214 <3bcab9b21f71d52bd1b2e03b80f29516bb000593; version=a2ed00da5047806233e288b991d9be997a5eb214 <9ad709afdfa32509ed64938a6d9cd00db3cd54c2; version=a2ed00da5047806233e288b991d9be997a5eb214 <b64f3497a0cd7bbd26d6c268eebd217d8062fcee

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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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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