CVE-2023-52867

Kernel memory corruption via unchecked Radeon audio index

Published May 21, 2024 · Updated Aug 5, 2026

An out-of-bounds write in the Linux Radeon display driver allows local users to corrupt kernel memory through HDMI audio handling. In drivers/gpu/drm/radeon/evergreen.c, code writes afmt_status[afmt_idx] before checking whether afmt_idx exceeds the six-element buffer. The flaw requires local low-privileged access and the Radeon driver; public sources identify no reliable trigger or result beyond possible kernel-memory corruption.

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

An out-of-bounds write in the Linux Radeon display driver allows local users to corrupt kernel memory through HDMI audio handling. In drivers/gpu/drm/radeon/evergreen.c, code writes afmt_status[afmt_idx] before checking whether afmt_idx exceeds the six-element buffer. The flaw requires local low-privileged access and the Radeon driver; public sources identify no reliable trigger or result beyond possible kernel-memory corruption.

The record

CVE
CVE-2023-52867
Published
May 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=4.13
  2. Affected versionversion=5cc4e5fc293bfe2634535f544427e8c6061492a5 <112d4b02d94bf9fa4f1d3376587878400dd74783
  3. Affected versionversion=5cc4e5fc293bfe2634535f544427e8c6061492a5 <19534a7a225f1bf2da70a9a90d41d0215f8f6b45
  4. Affected versionversion=5cc4e5fc293bfe2634535f544427e8c6061492a5 <341e79f8aec6af6b0061b8171d77b085835c6a58
  5. Affected versionversion=5cc4e5fc293bfe2634535f544427e8c6061492a5 <347f025a02b3a5d715a0b471fc3b1439c338ad94
  6. Affected versionversion=5cc4e5fc293bfe2634535f544427e8c6061492a5 <7b063c93bece827fde237fae1c101bceeee4e896
  7. Affected versionversion=5cc4e5fc293bfe2634535f544427e8c6061492a5 <caaa74541459c4c9e2c10046cf66ad2890483d0f
  8. Affected versionversion=5cc4e5fc293bfe2634535f544427e8c6061492a5 <d9b4fa249deaae1145d6fc2b64dae718e5c7a855
  9. Affected versionversion=5cc4e5fc293bfe2634535f544427e8c6061492a5 <dd05484f99d16715a88eedfca363828ef9a4c2d4
  10. Affected versionversion=5cc4e5fc293bfe2634535f544427e8c6061492a5 <ddc42881f170f1f518496f5a70447501335fc783

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.13; version=5cc4e5fc293bfe2634535f544427e8c6061492a5 <112d4b02d94bf9fa4f1d3376587878400dd74783; version=5cc4e5fc293bfe2634535f544427e8c6061492a5 <19534a7a225f1bf2da70a9a90d41d0215f8f6b45; version=5cc4e5fc293bfe2634535f544427e8c6061492a5 <341e79f8aec6af6b0061b8171d77b085835c6a58; version=5cc4e5fc293bfe2634535f544427e8c6061492a5 <347f025a02b3a5d715a0b471fc3b1439c338ad94; version=5cc4e5fc293bfe2634535f544427e8c6061492a5 <7b063c93bece827fde237fae1c101bceeee4e896; version=5cc4e5fc293bfe2634535f544427e8c6061492a5 <caaa74541459c4c9e2c10046cf66ad2890483d0f; version=5cc4e5fc293bfe2634535f544427e8c6061492a5 <d9b4fa249deaae1145d6fc2b64dae718e5c7a855; version=5cc4e5fc293bfe2634535f544427e8c6061492a5 <dd05484f99d16715a88eedfca363828ef9a4c2d4; version=5cc4e5fc293bfe2634535f544427e8c6061492a5 <ddc42881f170f1f518496f5a70447501335fc783

Published CVSS scores

7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-787Out-of-bounds Write

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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