CVE-2023-52812

Out-of-bounds access via zero link-level underflow

Published May 21, 2024 · Updated May 23, 2026

Improper array-index validation in the Linux AMD GPU driver allows local users to trigger an out-of-bounds access under SR-IOV. smu_v13_0_update_pcie_parameters subtracts one from pcie_table->num_of_link_levels and indexes the PCIe generation and lane arrays without first rejecting a zero count. SR-IOV must yield zero PCIe link levels; the public record does not specify whether the access reads, writes, crashes, or enables privilege gain.

CVSS severity7.8
High
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper array-index validation in the Linux AMD GPU driver allows local users to trigger an out-of-bounds access under SR-IOV. smu_v13_0_update_pcie_parameters subtracts one from pcie_table->num_of_link_levels and indexes the PCIe generation and lane arrays without first rejecting a zero count. SR-IOV must yield zero PCIe link levels; the public record does not specify whether the access reads, writes, crashes, or enables privilege gain.

The record

CVE
CVE-2023-52812
Published
May 21, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-129
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 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=31c7a3b378a136adc63296a2ff17645896fcf303 <09f617219fe9ccd8d7b65dc3e879b5889f663b5a
  2. Affected versionversion=31c7a3b378a136adc63296a2ff17645896fcf303 <406e8845356d18bdf3d3a23b347faf67706472ec
  3. Affected versionversion=31c7a3b378a136adc63296a2ff17645896fcf303 <5b4574b663d0a1a0a62d5232429b7db9ae6d0670
  4. Affected versionversion=6.1.40 <6.1.119
  5. Affected versionversion=6.4.5 <6.5
  6. Affected versionversion=6.5
  7. Affected versionversion=a924e0fa77d0ce382346b7b4c8419cb47189fb58
  8. Affected versionversion=bd8cd38d3ac6b6410ac4e7401ef3dca057a9b285 <2f2d48b6247ae3001f83c98730b3cce475cb2927

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=31c7a3b378a136adc63296a2ff17645896fcf303 <09f617219fe9ccd8d7b65dc3e879b5889f663b5a; version=31c7a3b378a136adc63296a2ff17645896fcf303 <406e8845356d18bdf3d3a23b347faf67706472ec; version=31c7a3b378a136adc63296a2ff17645896fcf303 <5b4574b663d0a1a0a62d5232429b7db9ae6d0670; version=6.1.40 <6.1.119; version=6.4.5 <6.5; version=6.5; version=a924e0fa77d0ce382346b7b4c8419cb47189fb58; version=bd8cd38d3ac6b6410ac4e7401ef3dca057a9b285 <2f2d48b6247ae3001f83c98730b3cce475cb2927

Published CVSS scores

7.8NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.3SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-129Improper Validation of Array Index

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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