CVE-2026-89807Hinoki check available

Host panic via unchecked restore callback

Published Sep 16, 2026 · Updated Sep 16, 2026

NULL callback dereference in Linux 6.11 allows local users with CAP_CHECKPOINT_RESTORE to panic the host through a crafted KFD CRIU queue restore. The create_queue_cpsch() and create_queue_nocpsch() paths call mqd_mgr->restore_mqd() without checking whether the callback exists for the supplied queue type. Reachability requires local /dev/kfd access, CAP_CHECKPOINT_RESTORE, and a hand-crafted restore payload; successful exploitation causes a kernel panic rather than data access.

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

What happened

NULL callback dereference in Linux 6.11 allows local users with CAP_CHECKPOINT_RESTORE to panic the host through a crafted KFD CRIU queue restore. The create_queue_cpsch() and create_queue_nocpsch() paths call mqd_mgr->restore_mqd() without checking whether the callback exists for the supplied queue type. Reachability requires local /dev/kfd access, CAP_CHECKPOINT_RESTORE, and a hand-crafted restore payload; successful exploitation causes a kernel panic rather than data access.

The record

CVE
CVE-2026-89807
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
admin

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=48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 <19c73848493ab58e39649700da6de11710a36de1
  2. Affected versionversion=48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 <6aa530642f95d5c48aa336416f94a35e7949b647
  3. Affected versionversion=48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 <c643c229babe2e8efc5eefe60e19d44868a643ff
  4. Affected versionversion=48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 <ebffa44e7a21ead59ac4b4264e8fc2cbb44c4a21
  5. Affected versionversion=6.11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 <19c73848493ab58e39649700da6de11710a36de1; version=48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 <6aa530642f95d5c48aa336416f94a35e7949b647; version=48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 <c643c229babe2e8efc5eefe60e19d44868a643ff; version=48f0bdf4e38e42b8285622cfcfc7e6e490b1a719 <ebffa44e7a21ead59ac4b4264e8fc2cbb44c4a21; version=6.11

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

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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