Local privilege escalation via unlocked DMA descriptors
Published May 20, 2024 · Updated Aug 5, 2026
Improper locking in the Xilinx DPDMA driver in Linux 5.9 and later allows local users to crash the kernel through DRM ioctls. Concurrent terminate_all and vsync paths access and free shared DMA descriptors without chan->lock or chan->vchan.lock, creating use-after-free and list corruption. Access requires DRM master rights on Xilinx ZynqMP hardware; successful exploitation grants kernel-level code execution or causes a panic.
Summary
What happened
Improper locking in the Xilinx DPDMA driver in Linux 5.9 and later allows local users to crash the kernel through DRM ioctls. Concurrent terminate_all and vsync paths access and free shared DMA descriptors without chan->lock or chan->vchan.lock, creating use-after-free and list corruption. Access requires DRM master rights on Xilinx ZynqMP hardware; successful exploitation grants kernel-level code execution or causes a panic.
The record
- CVE
- CVE-2024-35990
- Published
- May 20, 2024
- Updated
- Aug 5, 2026
- Vendor
- Siemens
- Product
- SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
- Classifications
- CWE-667, T1068, T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 20, 2024CVE publishedPublication date reported by the CVE source.
- Aug 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
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- Affected versionversion=0 <*
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What is affected?
Published CVSS scores
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Attacks
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Technologies
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