CVE-2024-56784

Local privilege escalation via host-router array overflow

Published Jan 8, 2025 · Updated Aug 5, 2026

Out-of-bounds write in Linux kernel 6.11 allows local users to corrupt kernel memory through an AMD GPU atomic display commit. In dcn35_notify_host_router_bw, an unchecked hr_index updates the two-element host_router_bw_kbps stack array outside its bounds. A low-privileged user with /dev/dri/card0 access on affected DCN 3.5.1 hardware can disclose kernel memory, hijack control flow, or crash the system.

CVSS severity7.8
High
EPSS probability0.20%
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 write in Linux kernel 6.11 allows local users to corrupt kernel memory through an AMD GPU atomic display commit. In dcn35_notify_host_router_bw, an unchecked hr_index updates the two-element host_router_bw_kbps stack array outside its bounds. A low-privileged user with /dev/dri/card0 access on affected DCN 3.5.1 hardware can disclose kernel memory, hijack control flow, or crash the system.

The record

CVE
CVE-2024-56784
Published
Jan 8, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 8, 2025CVE 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=0057b36ac2be0f573048acda52e641e0502a9ff3 <2c437d9a0b496168e1a1defd17b531f0a526dbe9
  2. Affected versionversion=0057b36ac2be0f573048acda52e641e0502a9ff3 <dff526dc3e27f5484f5ba11471b9fbbe681467f2
  3. Affected versionversion=6.11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0057b36ac2be0f573048acda52e641e0502a9ff3 <2c437d9a0b496168e1a1defd17b531f0a526dbe9; version=0057b36ac2be0f573048acda52e641e0502a9ff3 <dff526dc3e27f5484f5ba11471b9fbbe681467f2; version=6.11

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8CISA-ADPCVSS: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.

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-787Out-of-bounds Write
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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