CVE-2023-53444

System crash via corrupted TTM bulk-move list

Published Sep 18, 2025 · Updated Sep 18, 2025

NULL pointer dereference in the Linux kernel DRM TTM subsystem allows local users to crash the system through resource-list operations. The bulk-move addition path moves a resource already at the range head to the tail without updating the first pointer, corrupting the list before ttm_lru_bulk_move_del() dereferences it. Exploitation requires local low-privileged access and a reachable DRM TTM workload; the bounded consequence is a kernel crash and service interruption.

CVSS severity5.5
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux kernel DRM TTM subsystem allows local users to crash the system through resource-list operations. The bulk-move addition path moves a resource already at the range head to the tail without updating the first pointer, corrupting the list before ttm_lru_bulk_move_del() dereferences it. Exploitation requires local low-privileged access and a reachable DRM TTM workload; the bounded consequence is a kernel crash and service interruption.

The record

CVE
CVE-2023-53444
Published
Sep 18, 2025
Updated
Sep 18, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2025Record 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=5.19
  2. Affected versionversion=fee2ede155423b0f7a559050a39750b98fe9db69 <4481913607e58196c48a4fef5e6f45350684ec3c
  3. Affected versionversion=fee2ede155423b0f7a559050a39750b98fe9db69 <70a3015683b007a0db4a1e858791b69afd45fc83
  4. Affected versionversion=fee2ede155423b0f7a559050a39750b98fe9db69 <e7cf50e41bdc2d574056ebbfeaafc5f0e2562d5b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.19; version=fee2ede155423b0f7a559050a39750b98fe9db69 <4481913607e58196c48a4fef5e6f45350684ec3c; version=fee2ede155423b0f7a559050a39750b98fe9db69 <70a3015683b007a0db4a1e858791b69afd45fc83; version=fee2ede155423b0f7a559050a39750b98fe9db69 <e7cf50e41bdc2d574056ebbfeaafc5f0e2562d5b

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/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-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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