CVE-2024-46723

Kernel memory exposure via unchecked firmware identifier

Published Sep 18, 2024 · Updated May 11, 2026

Out-of-bounds read in the Linux kernel amdgpu driver allows local users to read kernel memory through a firmware information request. The amdgpu_cgs_get_firmware_info function uses the identifier returned by fw_type_convert to index adev->firmware.ucode without first rejecting values at or above AMDGPU_UCODE_ID_MAXIMUM. An attacker needs local access and an AMD GPU that reaches this firmware lookup; the invalid array access can expose kernel memory or crash the system.

CVSS severity7.1
High
EPSS probability0.25%
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 amdgpu driver allows local users to read kernel memory through a firmware information request. The amdgpu_cgs_get_firmware_info function uses the identifier returned by fw_type_convert to index adev->firmware.ucode without first rejecting values at or above AMDGPU_UCODE_ID_MAXIMUM. An attacker needs local access and an AMD GPU that reaches this firmware lookup; the invalid array access can expose kernel memory or crash the system.

The record

CVE
CVE-2024-46723
Published
Sep 18, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 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 <0bef65e069d84d1cd77ce757aea0e437b8e2bd33
  3. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <23fefef859c6057e6770584242bdd938254f8ddd
  4. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <5f09fa5e0ad45fbca71933a0e024ca52da47d59b
  5. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <82ac8f1d02886b5d8aeb9e058989d3bd6fc581e2
  6. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <8944acd0f9db33e17f387fdc75d33bb473d7936f
  7. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <8981927ebc6c12fa76b30c4178acb462bab15f54
  8. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <e789e05388854a5436b2b5d8695fdb864c9bcc27
  9. Affected versionversion=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <f2b7a9f3839e92f43559b2795b34640ca8cf839f

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.2; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <0bef65e069d84d1cd77ce757aea0e437b8e2bd33; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <23fefef859c6057e6770584242bdd938254f8ddd; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <5f09fa5e0ad45fbca71933a0e024ca52da47d59b; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <82ac8f1d02886b5d8aeb9e058989d3bd6fc581e2; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <8944acd0f9db33e17f387fdc75d33bb473d7936f; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <8981927ebc6c12fa76b30c4178acb462bab15f54; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <e789e05388854a5436b2b5d8695fdb864c9bcc27; version=d38ceaf99ed015f2a0b9af3499791bd3a3daae21 <f2b7a9f3839e92f43559b2795b34640ca8cf839f

Published CVSS scores

7.1NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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.

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-125Out-of-bounds Read
T1005Data from Local System

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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