CVE-2026-43318

GPU page fault via premature page-table update

Published May 8, 2026 · Updated May 8, 2026

Synchronization failure in the AMDGPU DMA-buffer path in Linux Kernel allows local users to cause a GPU page fault during buffer moves. amdgpu_dma_buf_move_notify passes a reservation ticket that makes amdgpu_vm_handle_moved update a shared buffer's page table before an in-flight blit finishes. The condition requires shared-buffer movement between two GPUs without P2P PCI support, interrupting the affected GPU workload with a page fault.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Synchronization failure in the AMDGPU DMA-buffer path in Linux Kernel allows local users to cause a GPU page fault during buffer moves. amdgpu_dma_buf_move_notify passes a reservation ticket that makes amdgpu_vm_handle_moved update a shared buffer's page table before an in-flight blit finishes. The condition requires shared-buffer movement between two GPUs without P2P PCI support, interrupting the affected GPU workload with a page fault.

The record

CVE
CVE-2026-43318
Published
May 8, 2026
Updated
May 8, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 8, 2026CVE publishedPublication date reported by the CVE source.
  2. May 8, 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=5.7
  2. Affected versionversion=a448cb003edcb4b63d0a9c95f3faab724e6150fb <3307459eb3583115264421e859858d1f90f3694a
  3. Affected versionversion=a448cb003edcb4b63d0a9c95f3faab724e6150fb <82a7ea35a1526bef8ae170c33ff80e5db7728961
  4. Affected versionversion=a448cb003edcb4b63d0a9c95f3faab724e6150fb <89a9389ad70d3c69538e59d87df67d407aef4c26
  5. Affected versionversion=a448cb003edcb4b63d0a9c95f3faab724e6150fb <b18fc0ab837381c1a6ef28386602cd888f2d9edf

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5.7; version=a448cb003edcb4b63d0a9c95f3faab724e6150fb <3307459eb3583115264421e859858d1f90f3694a; version=a448cb003edcb4b63d0a9c95f3faab724e6150fb <82a7ea35a1526bef8ae170c33ff80e5db7728961; version=a448cb003edcb4b63d0a9c95f3faab724e6150fb <89a9389ad70d3c69538e59d87df67d407aef4c26; version=a448cb003edcb4b63d0a9c95f3faab724e6150fb <b18fc0ab837381c1a6ef28386602cd888f2d9edf

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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

T1499.004Endpoint Denial of Service: Application 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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