CVE-2023-52817

Kernel crash via unchecked smc_rreg callback

Published May 21, 2024 · Updated May 11, 2026

NULL pointer dereference in affected Linux kernel releases allows local users to crash the kernel by reading an amdgpu debugfs file. amdgpu_debugfs_regs_smc_read invokes the device's smc_rreg callback without first checking whether the function pointer is NULL. Local access to the debugfs file and affected AMD GPU hardware such as VEGA20 are required; triggering the flaw causes a kernel oops and service interruption.

CVSS severity5.5
Medium
EPSS probability0.24%
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 affected Linux kernel releases allows local users to crash the kernel by reading an amdgpu debugfs file. amdgpu_debugfs_regs_smc_read invokes the device's smc_rreg callback without first checking whether the function pointer is NULL. Local access to the debugfs file and affected AMD GPU hardware such as VEGA20 are required; triggering the flaw causes a kernel oops and service interruption.

The record

CVE
CVE-2023-52817
Published
May 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=4.2
  2. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <174f62a0aa15c211e60208b41ee9e7cdfb73d455
  3. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <437e0fa907ba39b4d7eda863c03ea9cf48bd93a9
  4. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <5104fdf50d326db2c1a994f8b35dcd46e63ae4ad
  5. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <6c1b3d89a2dda79881726bb6e37af19c0936d736
  6. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <820daf9ffe2b0afb804567b10983fb38bc5ae288
  7. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <ba3c0796d292de84f2932cc5bbb0f771fc720996
  8. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <bf2d51eedf03bd61e3556e35d74d49e2e6112398
  9. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <f475d5502f33a6c5b149b0afe96316ad1962a64a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.2; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <174f62a0aa15c211e60208b41ee9e7cdfb73d455; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <437e0fa907ba39b4d7eda863c03ea9cf48bd93a9; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <5104fdf50d326db2c1a994f8b35dcd46e63ae4ad; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <6c1b3d89a2dda79881726bb6e37af19c0936d736; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <820daf9ffe2b0afb804567b10983fb38bc5ae288; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <ba3c0796d292de84f2932cc5bbb0f771fc720996; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <bf2d51eedf03bd61e3556e35d74d49e2e6112398; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <f475d5502f33a6c5b149b0afe96316ad1962a64a

Published CVSS scores

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

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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