Memory corruption via stale GPU SMMU mappings
Published Aug 5, 2024 · Updated Aug 5, 2024
Use after free in Qualcomm Graphics Linux firmware allows local users to corrupt memory through concurrent GPU buffer operations. During simultaneous buffer binding and reclamation, a VBO can retain an outdated or invalid GPU SMMU mapping and access memory after its backing buffer is freed. Local execution without prior privileges is required; exploitation can disclose or alter memory or interrupt the device, while the race and closed firmware preclude a safe external probe.
Summary
What happened
Use after free in Qualcomm Graphics Linux firmware allows local users to corrupt memory through concurrent GPU buffer operations. During simultaneous buffer binding and reclamation, a VBO can retain an outdated or invalid GPU SMMU mapping and access memory after its backing buffer is freed. Local execution without prior privileges is required; exploitation can disclose or alter memory or interrupt the device, while the race and closed firmware preclude a safe external probe.
The record
- CVE
- CVE-2024-33034
- Published
- Aug 5, 2024
- Updated
- Aug 5, 2024
- Vendor
- Qualcomm
- Product
- SA8155P Firmware
- Classifications
- CWE-416
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Aug 5, 2024CVE publishedPublication date reported by the CVE source.
- Aug 5, 2024Record 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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