CVE-2026-97925Hinoki check available

System crash via unserialized broadcast-device replacement

Published Sep 25, 2026 · Updated Sep 25, 2026

Race condition in the Linux kernel tick broadcast subsystem allows attackers to crash an affected system via unspecified vectors. tick_install_broadcast_device replaces and detaches the current clockevent device without serializing the exchange against a concurrent broadcast operation, which can then arm the detached device. The kernel BUG occurs when the former device has restricted interrupt affinity and the last CPU in that mask goes offline.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Race condition in the Linux kernel tick broadcast subsystem allows attackers to crash an affected system via unspecified vectors. tick_install_broadcast_device replaces and detaches the current clockevent device without serializing the exchange against a concurrent broadcast operation, which can then arm the detached device. The kernel BUG occurs when the former device has restricted interrupt affinity and the last CPU in that mask goes offline.

The record

CVE
CVE-2026-97925
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
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=2.6.21
  2. Affected versionversion=f8381cba04ba8173fd5a2b8e5cd8b3290ee13a98 <113a9796effe3376d2ec5aabcca1fef4fef4cd62
  3. Affected versionversion=f8381cba04ba8173fd5a2b8e5cd8b3290ee13a98 <292b7a8ed84032cfdfc9076a690360f7d3f640d4
  4. Affected versionversion=f8381cba04ba8173fd5a2b8e5cd8b3290ee13a98 <3525b94b2f258e0b99d1ee5a82a80b51bc1cc818
  5. Affected versionversion=f8381cba04ba8173fd5a2b8e5cd8b3290ee13a98 <3da55616db2b6b7d9caa3b7ff1e8983224e0ed52

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.21; version=f8381cba04ba8173fd5a2b8e5cd8b3290ee13a98 <113a9796effe3376d2ec5aabcca1fef4fef4cd62; version=f8381cba04ba8173fd5a2b8e5cd8b3290ee13a98 <292b7a8ed84032cfdfc9076a690360f7d3f640d4; version=f8381cba04ba8173fd5a2b8e5cd8b3290ee13a98 <3525b94b2f258e0b99d1ee5a82a80b51bc1cc818; version=f8381cba04ba8173fd5a2b8e5cd8b3290ee13a98 <3da55616db2b6b7d9caa3b7ff1e8983224e0ed52

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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