CVE-2023-53248

Kernel crash via uninitialized AMDGPU fence pointers

Published Sep 15, 2025 · Updated Sep 15, 2025

NULL pointer dereference in Linux AMDGPU VM code allows local users to crash the kernel during CPU-based page-table updates. The amdgpu_vm_bo_add, amdgpu_vm_init, and amdgpu_vm_make_compute paths leave update-fence pointers as NULL before dma_fence_wait consumes them. A local low-privilege user must reach CPU-driven AMDGPU page-table updates; the resulting dereference can halt the host.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Linux AMDGPU VM code allows local users to crash the kernel during CPU-based page-table updates. The amdgpu_vm_bo_add, amdgpu_vm_init, and amdgpu_vm_make_compute paths leave update-fence pointers as NULL before dma_fence_wait consumes them. A local low-privilege user must reach CPU-driven AMDGPU page-table updates; the resulting dereference can halt the host.

The record

CVE
CVE-2023-53248
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2025Record 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <187916e6ed9d0c3b3abc27429f7a5f8c936bd1f0
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <78b25110eb8c6990f7f5096bc0136c12a2b4cc99
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <aa9e9ba5748c524eb0925a2ef6984b78793646d6

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <187916e6ed9d0c3b3abc27429f7a5f8c936bd1f0; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <78b25110eb8c6990f7f5096bc0136c12a2b4cc99; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <aa9e9ba5748c524eb0925a2ef6984b78793646d6

Published CVSS scores

5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NVDCVSS: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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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