CVE-2026-80870Hinoki check available

Kernel WARN via oversized CRIU-restored IDs

Published Sep 4, 2026 · Updated Sep 4, 2026

Improper input validation in affected Linux kernels allows local users to trigger a kernel WARN through crafted KFD CRIU restore data. The kfd_criu_restore_event() and criu_restore_memory_of_gpu() paths pass userspace-supplied event and buffer-object IDs above INT_MAX into idr_alloc() without enforcing its signed-int range requirement. Reachability requires the AMD KFD CRIU restore flow; the result is a warning trace, escalating to a kernel panic and reboot only when panic_on_warn is enabled.

CVSS severityUnavailable
Unscored
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper input validation in affected Linux kernels allows local users to trigger a kernel WARN through crafted KFD CRIU restore data. The kfd_criu_restore_event() and criu_restore_memory_of_gpu() paths pass userspace-supplied event and buffer-object IDs above INT_MAX into idr_alloc() without enforcing its signed-int range requirement. Reachability requires the AMD KFD CRIU restore flow; the result is a warning trace, escalating to a kernel panic and reboot only when panic_on_warn is enabled.

The record

CVE
CVE-2026-80870
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-20, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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=40e8a766a761f7fdc8530347527b344fddf6f1a8 <085ea93bda71fee600cc12a17026598eb10dd1f9
  2. Affected versionversion=40e8a766a761f7fdc8530347527b344fddf6f1a8 <543ed0f61d56501cc585162da600bbedd7c08c0f
  3. Affected versionversion=40e8a766a761f7fdc8530347527b344fddf6f1a8 <85043dd49c2f51a37b22618168e3ae59ab92f0d6
  4. Affected versionversion=40e8a766a761f7fdc8530347527b344fddf6f1a8 <89a75e3349c4fae28cbedc711bc924cbc6293da2
  5. Affected versionversion=40e8a766a761f7fdc8530347527b344fddf6f1a8 <cb6311f25a096621ac7ffd91b50d1bb1cfb63a96
  6. Affected versionversion=40e8a766a761f7fdc8530347527b344fddf6f1a8 <f8687018f24037056692c1e93c7d96cc72889d5b
  7. Affected versionversion=5.18

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=40e8a766a761f7fdc8530347527b344fddf6f1a8 <085ea93bda71fee600cc12a17026598eb10dd1f9; version=40e8a766a761f7fdc8530347527b344fddf6f1a8 <543ed0f61d56501cc585162da600bbedd7c08c0f; version=40e8a766a761f7fdc8530347527b344fddf6f1a8 <85043dd49c2f51a37b22618168e3ae59ab92f0d6; version=40e8a766a761f7fdc8530347527b344fddf6f1a8 <89a75e3349c4fae28cbedc711bc924cbc6293da2; version=40e8a766a761f7fdc8530347527b344fddf6f1a8 <cb6311f25a096621ac7ffd91b50d1bb1cfb63a96; version=40e8a766a761f7fdc8530347527b344fddf6f1a8 <f8687018f24037056692c1e93c7d96cc72889d5b; version=5.18

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation
T1499.004Application or System Exploitation

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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