CVE-2026-43202
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vt8500lcdfb Missing DMA Buffer Free in Linux Kernel
Publication date: 2026-05-06
Last updated on: 2026-05-06
Assigner: kernel.org
Description
Description
In the Linux kernel, the following vulnerability has been resolved:
fbdev: vt8500lcdfb: fix missing dma_free_coherent()
fbi->fb.screen_buffer is allocated with dma_alloc_coherent() but is not
freed if the error path is reached.
CVSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| linux | linux_kernel | * |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-UNKNOWN |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in the Linux kernel's fbdev vt8500lcdfb driver. Specifically, the screen buffer (fbi->fb.screen_buffer) is allocated using dma_alloc_coherent(), but if an error occurs, the allocated memory is not freed properly because dma_free_coherent() is missing in the error handling path.
How can this vulnerability impact me? :
Because the allocated DMA memory is not freed on error, this can lead to a memory leak in the kernel. Over time, this could degrade system performance or stability due to resource exhaustion.
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