CVE-2024-46821

Kernel memory read via negative clock index

Published Sep 27, 2024 · Updated May 11, 2026

Out-of-bounds read in the Linux kernel AMD GPU power-management driver allows local users to read unintended kernel memory. The Navi10 power-management path accepts a negative clock index and uses it to index pptable->DpmDescriptor. Reachability requires local access and affected AMD GPU driver code; public records disclose neither a reliable trigger nor the data exposed.

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

Out-of-bounds read in the Linux kernel AMD GPU power-management driver allows local users to read unintended kernel memory. The Navi10 power-management path accepts a negative clock index and uses it to index pptable->DpmDescriptor. Reachability requires local access and affected AMD GPU driver code; public records disclose neither a reliable trigger nor the data exposed.

The record

CVE
CVE-2024-46821
Published
Sep 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-129, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 27, 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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1a195ed5f197fcfd1d99ceedd469857fcd7d8c4f <06a3810010b525b9958424e344f0c25b09e128fa
  2. Affected versionversion=1a195ed5f197fcfd1d99ceedd469857fcd7d8c4f <4711b1347cb9f0c3083da6d87c624d75f9bd1d50
  3. Affected versionversion=1a195ed5f197fcfd1d99ceedd469857fcd7d8c4f <60f4a4bc3329e5cb8c4df0cc961f0d5ffd96e22d
  4. Affected versionversion=1a195ed5f197fcfd1d99ceedd469857fcd7d8c4f <befd1dc693c98bad69a701ede3a298698f0f9436
  5. Affected versionversion=1a195ed5f197fcfd1d99ceedd469857fcd7d8c4f <c8c19ebf7c0b202a6a2d37a52ca112432723db5f
  6. Affected versionversion=1a195ed5f197fcfd1d99ceedd469857fcd7d8c4f <e549cd6da1f21c34ba0f65adeca6a8aa9860b381
  7. Affected versionversion=5.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1a195ed5f197fcfd1d99ceedd469857fcd7d8c4f <06a3810010b525b9958424e344f0c25b09e128fa; version=1a195ed5f197fcfd1d99ceedd469857fcd7d8c4f <4711b1347cb9f0c3083da6d87c624d75f9bd1d50; version=1a195ed5f197fcfd1d99ceedd469857fcd7d8c4f <60f4a4bc3329e5cb8c4df0cc961f0d5ffd96e22d; version=1a195ed5f197fcfd1d99ceedd469857fcd7d8c4f <befd1dc693c98bad69a701ede3a298698f0f9436; version=1a195ed5f197fcfd1d99ceedd469857fcd7d8c4f <c8c19ebf7c0b202a6a2d37a52ca112432723db5f; version=1a195ed5f197fcfd1d99ceedd469857fcd7d8c4f <e549cd6da1f21c34ba0f65adeca6a8aa9860b381; version=5.3

Published CVSS scores

7.8NIST NVDCVSS: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 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
T1068Exploitation for Privilege Escalation

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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