CVE-2026-98200

Kernel use-after-free read via unlocked sensor state

Published Oct 6, 2026 · Updated Oct 6, 2026

A use-after-free in Linux kernel 6.5 allows local users to trigger an unsafe kernel read through the HP WMI sensor debugfs entry. In fungible_show(), seq_printf() reads nsensor->current_state after hp_wmi_update_info() releases state->lock, while a concurrent refresh can free and replace that string. The race requires an HP WMI sensor, enabled debugfs, and overlapping sensor reads; debugfs is root-only by default, and the source establishes neither code execution nor data disclosure.

CVSS severityUnavailable
Unscored
EPSS probability0.18%
Next 30 days · Oct 20, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A use-after-free in Linux kernel 6.5 allows local users to trigger an unsafe kernel read through the HP WMI sensor debugfs entry. In fungible_show(), seq_printf() reads nsensor->current_state after hp_wmi_update_info() releases state->lock, while a concurrent refresh can free and replace that string. The race requires an HP WMI sensor, enabled debugfs, and overlapping sensor reads; debugfs is root-only by default, and the source establishes neither code execution nor data disclosure.

The record

CVE
CVE-2026-98200
Published
Oct 6, 2026
Updated
Oct 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Oct 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 6, 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=23902f98f8d4811ab84dde6419569a5b374f8122 <72c85149794a1ccf8d718ffed1521106b5d31968
  2. Affected versionversion=23902f98f8d4811ab84dde6419569a5b374f8122 <9c1e65bc79ff104914b11e6ad972139296ec86fe
  3. Affected versionversion=23902f98f8d4811ab84dde6419569a5b374f8122 <b6b2a638aa36c441b2c8d0b6bd8ed2bb9701e795
  4. Affected versionversion=23902f98f8d4811ab84dde6419569a5b374f8122 <e6cb0b4d4ecb8e71fd2200d907ab2e9663356f69
  5. Affected versionversion=23902f98f8d4811ab84dde6419569a5b374f8122 <f59ecfd2c58bace39538f3fff7f43788b3fdb539
  6. Affected versionversion=6.5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=23902f98f8d4811ab84dde6419569a5b374f8122 <72c85149794a1ccf8d718ffed1521106b5d31968; version=23902f98f8d4811ab84dde6419569a5b374f8122 <9c1e65bc79ff104914b11e6ad972139296ec86fe; version=23902f98f8d4811ab84dde6419569a5b374f8122 <b6b2a638aa36c441b2c8d0b6bd8ed2bb9701e795; version=23902f98f8d4811ab84dde6419569a5b374f8122 <e6cb0b4d4ecb8e71fd2200d907ab2e9663356f69; version=23902f98f8d4811ab84dde6419569a5b374f8122 <f59ecfd2c58bace39538f3fff7f43788b3fdb539; version=6.5

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.

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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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Your stack

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