CVE-2024-56775

Kernel crash via lost display-plane refcount

Published Jan 8, 2025 · Updated Aug 5, 2026

Double-free flaw in Linux 4.15 through 6.12.3 allows local users to crash the kernel through AMD display plane state changes. The backup-and-restore logic in drivers/gpu/drm/amd/display/dc/core/dc.c fails to preserve and reapply the current plane refcount, producing leaks, double frees, or invalid memory access when the count changes. Reachability requires low-privileged local access and an AMD display path that exercises a refcount change between backup and restore; successful triggering can corrupt kernel memory or interrupt service.

CVSS severity7.8
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Double-free flaw in Linux 4.15 through 6.12.3 allows local users to crash the kernel through AMD display plane state changes. The backup-and-restore logic in drivers/gpu/drm/amd/display/dc/core/dc.c fails to preserve and reapply the current plane refcount, producing leaks, double frees, or invalid memory access when the count changes. Reachability requires low-privileged local access and an AMD display path that exercises a refcount change between backup and restore; successful triggering can corrupt kernel memory or interrupt service.

The record

CVE
CVE-2024-56775
Published
Jan 8, 2025
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-415, 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

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=4.15
  2. Affected versionversion=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <27227a234c1487cb7a684615f0749c455218833a
  3. Affected versionversion=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <8cb2f6793845f135b28361ba8e96901cae3e5790

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.15; version=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <27227a234c1487cb7a684615f0749c455218833a; version=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <8cb2f6793845f135b28361ba8e96901cae3e5790

Published CVSS scores

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-415Double Free
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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo