Out-of-bounds memory access via unchecked BO copy bounds
Published Aug 28, 2026 · Updated Aug 28, 2026
Out-of-bounds memory access in vmw_external_bo_copy in Linux allows local users to corrupt memory via a crafted atomic display commit. Equal-stride copies subtract unchecked offsets and multiply a 32-bit stride by height, while unequal-stride copies perform row-by-row memcpy operations without checking either buffer endpoint. Reachability requires a configured vmwgfx CRTC, an imported dma-buf framebuffer, and attacker-controlled STDU or SOU plane state; the demonstrated consequence is access beyond a mapped buffer object.
Summary
What happened
Out-of-bounds memory access in vmw_external_bo_copy in Linux allows local users to corrupt memory via a crafted atomic display commit. Equal-stride copies subtract unchecked offsets and multiply a 32-bit stride by height, while unequal-stride copies perform row-by-row memcpy operations without checking either buffer endpoint. Reachability requires a configured vmwgfx CRTC, an imported dma-buf framebuffer, and attacker-controlled STDU or SOU plane state; the demonstrated consequence is access beyond a mapped buffer object.
The record
- CVE
- CVE-2026-80700
- Published
- Aug 28, 2026
- Updated
- Aug 28, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 28, 2026CVE publishedPublication date reported by the CVE source.
- Aug 28, 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=50f1199250912568606b3778dc56646c10cb7b04 <042ca38779554687fc32b66a28328e0d9a36c58f
- Affected versionversion=50f1199250912568606b3778dc56646c10cb7b04 <5e4a2d15637a906cbd9bc98e0bf969f5f713e344
- Affected versionversion=50f1199250912568606b3778dc56646c10cb7b04 <706c93c5813caabbb0d0a576c017d15aeec2c113
- Affected versionversion=50f1199250912568606b3778dc56646c10cb7b04 <e7b25a6011781ebfdbc458552cae6d4156732771
- Affected versionversion=5c12391ee1ab59cb2f3be3f1f5e6d0fc0c2dc854
- Affected versionversion=6.10.8 <6.11
- Affected versionversion=6.11
- Affected versionversion=6.6.49 <6.6.151
- Affected versionversion=9a9716bbbf3dd6b6cbefba3abcc89af8b72631f4 <4e0f669e2951b742239c6fe847fcc406fe78748d
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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