Kernel warning via unchecked DML21 stream mapping
Published Jul 2, 2025 · Updated May 11, 2026
Improper validation in Linux kernel 6.11 allows local users with root or CAP_SYS_ADMIN to trigger an AMD display warning during GPU reset. The dml2_map_dc_pipes path queries a DML21 plane ID without first confirming that the wrapper's stream ID matches the stream being mapped, reaching WARN_ON when no pipe matches. Access to amdgpu_gpu_recover under debugfs and compatible AMD display hardware is required; published evidence describes a false-positive warning, not data access or privilege gain.
Summary
What happened
Improper validation in Linux kernel 6.11 allows local users with root or CAP_SYS_ADMIN to trigger an AMD display warning during GPU reset. The dml2_map_dc_pipes path queries a DML21 plane ID without first confirming that the wrapper's stream ID matches the stream being mapped, reaching WARN_ON when no pipe matches. Access to amdgpu_gpu_recover under debugfs and compatible AMD display hardware is required; published evidence describes a false-positive warning, not data access or privilege gain.
The record
- CVE
- CVE-2025-38091
- Published
- Jul 2, 2025
- Updated
- May 11, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Jul 2, 2025CVE publishedPublication date reported by the CVE source.
- 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.
- Affected versionversion=6.11
- Affected versionversion=70839da6360500a82e4d5f78499284474cbed7c1 <2ddac70fed50485aa4ae49cdb7478ce41d8d4715
- Affected versionversion=70839da6360500a82e4d5f78499284474cbed7c1 <6f47d7408133631a1b178f8a04e79aee189ef046
- Affected versionversion=70839da6360500a82e4d5f78499284474cbed7c1 <c53f23f7075c9f63f14d7ec8f2cc3e33e118d986
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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