CVE-2026-80618Hinoki check available

Local unpin underflow via premature buffer unpin

Published Aug 28, 2026 · Updated Aug 28, 2026

Resource lifecycle error in Linux kernel 5.17 allows local users to trigger an AMDGPU buffer-object unpin underflow warning. amdgpu_amdkfd_gpuvm_free_memory_of_gpu() unpins a mapped DOORBELL or MMIO remap buffer before its mapped-state check returns -EBUSY, leaving the live object to be unpinned again during teardown. Triggering the warning requires an affected AMD KFD path, a buffer that remains mapped when freeing is attempted, and later process teardown; no crash, privilege gain, or data exposure is reported.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Resource lifecycle error in Linux kernel 5.17 allows local users to trigger an AMDGPU buffer-object unpin underflow warning. amdgpu_amdkfd_gpuvm_free_memory_of_gpu() unpins a mapped DOORBELL or MMIO remap buffer before its mapped-state check returns -EBUSY, leaving the live object to be unpinned again during teardown. Triggering the warning requires an affected AMD KFD path, a buffer that remains mapped when freeing is attempted, and later process teardown; no crash, privilege gain, or data exposure is reported.

The record

CVE
CVE-2026-80618
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 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=5.17
  2. Affected versionversion=d25e35bc26c3ca8cd728101545cfb3e86a5d7431 <0e27d92f69b8e4c750a4b181cc05a86b9338c4f5
  3. Affected versionversion=d25e35bc26c3ca8cd728101545cfb3e86a5d7431 <1d12ae8b079e173107abec0e5817332954c8e95f
  4. Affected versionversion=d25e35bc26c3ca8cd728101545cfb3e86a5d7431 <283e77af49fda96aaa57709fc5408b55ffec075e
  5. Affected versionversion=d25e35bc26c3ca8cd728101545cfb3e86a5d7431 <3f0cc1735273a57c5116710cf0202e12152f59cc
  6. Affected versionversion=d25e35bc26c3ca8cd728101545cfb3e86a5d7431 <461ae406ae12107ebb321cabe561434c27aaea58
  7. Affected versionversion=d25e35bc26c3ca8cd728101545cfb3e86a5d7431 <c055a2088b719e9a4b580685e0ca97f9554a41a8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.17; version=d25e35bc26c3ca8cd728101545cfb3e86a5d7431 <0e27d92f69b8e4c750a4b181cc05a86b9338c4f5; version=d25e35bc26c3ca8cd728101545cfb3e86a5d7431 <1d12ae8b079e173107abec0e5817332954c8e95f; version=d25e35bc26c3ca8cd728101545cfb3e86a5d7431 <283e77af49fda96aaa57709fc5408b55ffec075e; version=d25e35bc26c3ca8cd728101545cfb3e86a5d7431 <3f0cc1735273a57c5116710cf0202e12152f59cc; version=d25e35bc26c3ca8cd728101545cfb3e86a5d7431 <461ae406ae12107ebb321cabe561434c27aaea58; version=d25e35bc26c3ca8cd728101545cfb3e86a5d7431 <c055a2088b719e9a4b580685e0ca97f9554a41a8

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
Privilegesauthenticated
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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