CVE-2024-46747

Kernel memory disclosure via unchecked HID descriptor length

Published Sep 18, 2024 · Updated May 11, 2026

Out-of-bounds read in Linux 4.19 through 6.11-rc4 allows local users to disclose kernel memory or crash the host via a crafted HID descriptor. cougar_report_fixup reads descriptor bytes 2, 3, 115, and 116 before confirming that the buffer is at least 117 bytes long. Triggering the flaw requires the Cougar HID driver to process a short report descriptor from a Cougar 500K Gaming Keyboard interface, exposing memory or interrupting the host.

CVSS severity7.1
High
EPSS probability0.27%
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 Linux 4.19 through 6.11-rc4 allows local users to disclose kernel memory or crash the host via a crafted HID descriptor. cougar_report_fixup reads descriptor bytes 2, 3, 115, and 116 before confirming that the buffer is at least 117 bytes long. Triggering the flaw requires the Cougar HID driver to process a short report descriptor from a Cougar 500K Gaming Keyboard interface, exposing memory or interrupting the host.

The record

CVE
CVE-2024-46747
Published
Sep 18, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, T1200
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=4.19
  2. Affected versionversion=b8e759b8f6dab1c473c30ac12709095d0b81078e <30e9ce7cd5591be639b53595c95812f1a2afdfdc
  3. Affected versionversion=b8e759b8f6dab1c473c30ac12709095d0b81078e <34185de73d74fdc90e8651cfc472bfea6073a13f
  4. Affected versionversion=b8e759b8f6dab1c473c30ac12709095d0b81078e <48b2108efa205f4579052c27fba2b22cc6ad8aa0
  5. Affected versionversion=b8e759b8f6dab1c473c30ac12709095d0b81078e <890dde6001b651be79819ef7a3f8c71fc8f9cabf
  6. Affected versionversion=b8e759b8f6dab1c473c30ac12709095d0b81078e <a6e9c391d45b5865b61e569146304cff72821a5d
  7. Affected versionversion=b8e759b8f6dab1c473c30ac12709095d0b81078e <e239e44dcd419b13cf840e2a3a833204e4329714
  8. Affected versionversion=b8e759b8f6dab1c473c30ac12709095d0b81078e <e4a602a45aecd6a98b4b37482f5c9f8f67a32ddd
  9. Affected versionversion=b8e759b8f6dab1c473c30ac12709095d0b81078e <fac3cb3c6428afe2207593a183b5bc4742529dfd

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.19; version=b8e759b8f6dab1c473c30ac12709095d0b81078e <30e9ce7cd5591be639b53595c95812f1a2afdfdc; version=b8e759b8f6dab1c473c30ac12709095d0b81078e <34185de73d74fdc90e8651cfc472bfea6073a13f; version=b8e759b8f6dab1c473c30ac12709095d0b81078e <48b2108efa205f4579052c27fba2b22cc6ad8aa0; version=b8e759b8f6dab1c473c30ac12709095d0b81078e <890dde6001b651be79819ef7a3f8c71fc8f9cabf; version=b8e759b8f6dab1c473c30ac12709095d0b81078e <a6e9c391d45b5865b61e569146304cff72821a5d; version=b8e759b8f6dab1c473c30ac12709095d0b81078e <e239e44dcd419b13cf840e2a3a833204e4329714; version=b8e759b8f6dab1c473c30ac12709095d0b81078e <e4a602a45aecd6a98b4b37482f5c9f8f67a32ddd; version=b8e759b8f6dab1c473c30ac12709095d0b81078e <fac3cb3c6428afe2207593a183b5bc4742529dfd

Published CVSS scores

7.1NIST NVDCVSS: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.

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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-125Out-of-bounds Read
T1200Hardware Additions

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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