CVE-2026-97918Hinoki check available

Use-after-free via incomplete histogram trigger rollback

Published Sep 25, 2026 · Updated Sep 25, 2026

Use-after-free in Linux kernel 4.17 and later allows local users to access freed memory through a failing histogram trigger. When trace_event_trigger_enable_disable() fails, hist_trigger_enable() removes the trigger from file->triggers, so hist_unregister_trigger() cannot find it and cleanup frees data still referenced by named_triggers. Reachability requires local permission to write a histogram trigger in tracefs and an event-enable failure; the observed consequence is an invalid kernel read detected by KASAN.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Use-after-free in Linux kernel 4.17 and later allows local users to access freed memory through a failing histogram trigger. When trace_event_trigger_enable_disable() fails, hist_trigger_enable() removes the trigger from file->triggers, so hist_unregister_trigger() cannot find it and cleanup frees data still referenced by named_triggers. Reachability requires local permission to write a histogram trigger in tracefs and an event-enable failure; the observed consequence is an invalid kernel read detected by KASAN.

The record

CVE
CVE-2026-97918
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

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=067fe038e70f6e64960d26a79c4df5f1413d0f13 <51b07104d563d4be2be34158d3b9d922ca417642
  2. Affected versionversion=067fe038e70f6e64960d26a79c4df5f1413d0f13 <92383cef66791a0c63a2f27755cadbdb2fbf270b
  3. Affected versionversion=067fe038e70f6e64960d26a79c4df5f1413d0f13 <bfa6bc11aef93a3d9db0ac9564b734849a9d959b
  4. Affected versionversion=4.17

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=067fe038e70f6e64960d26a79c4df5f1413d0f13 <51b07104d563d4be2be34158d3b9d922ca417642; version=067fe038e70f6e64960d26a79c4df5f1413d0f13 <92383cef66791a0c63a2f27755cadbdb2fbf270b; version=067fe038e70f6e64960d26a79c4df5f1413d0f13 <bfa6bc11aef93a3d9db0ac9564b734849a9d959b; version=4.17

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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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