CVE-2026-90001

Kernel use-after-free via device reference race

Published Sep 16, 2026 · Updated Sep 16, 2026

Use-after-free in Linux kernel HID-BPF 6.11 allows local users to trigger freed-device access during concurrent teardown. The __hid_bpf_ops_destroy_device() and hid_bpf_unreg() paths check and clear ops->hdev under different lock domains, so both can release the same registration reference. Reachability requires an attached HID-BPF struct_ops registration plus concurrent link deletion and device destruction; the documented consequence is kernel access to a freed hid_device during teardown.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel HID-BPF 6.11 allows local users to trigger freed-device access during concurrent teardown. The __hid_bpf_ops_destroy_device() and hid_bpf_unreg() paths check and clear ops->hdev under different lock domains, so both can release the same registration reference. Reachability requires an attached HID-BPF struct_ops registration plus concurrent link deletion and device destruction; the documented consequence is kernel access to a freed hid_device during teardown.

The record

CVE
CVE-2026-90001
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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?

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  1. Affected versionversion=6.11
  2. Affected versionversion=ebc0d8093e8c97de459615438edefad1a4ac352c <401359684620145be710de97b87e1a47abfe1459
  3. Affected versionversion=ebc0d8093e8c97de459615438edefad1a4ac352c <9cdc7e6dc7a99ad7311ad5e7c145f2b9ce4e24b0
  4. Affected versionversion=ebc0d8093e8c97de459615438edefad1a4ac352c <bfb7939788f3c8dd080a4dd81e38d625b35d194e
  5. Affected versionversion=ebc0d8093e8c97de459615438edefad1a4ac352c <c7f927aa8b55008ed5ea0814313d5dad771dcf3c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.11; version=ebc0d8093e8c97de459615438edefad1a4ac352c <401359684620145be710de97b87e1a47abfe1459; version=ebc0d8093e8c97de459615438edefad1a4ac352c <9cdc7e6dc7a99ad7311ad5e7c145f2b9ce4e24b0; version=ebc0d8093e8c97de459615438edefad1a4ac352c <bfb7939788f3c8dd080a4dd81e38d625b35d194e; version=ebc0d8093e8c97de459615438edefad1a4ac352c <c7f927aa8b55008ed5ea0814313d5dad771dcf3c

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
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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