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dma fence use-after-free

About this tag
The tag dma fence use-after-free covers a specific class of Linux kernel memory-safety bugs, most notably CVE-2026-43237 in the AMDGPU driver. This vulnerability involves stale or freed DMA fence objects being accessed during GPU virtual-address timeline updates via the amdgpu_gem_va_ioctl function, leading to kernel panics. While the flaw is in the Linux kernel, it is tracked by Microsoft's MSRC, meaning organizations running Linux with AMD graphics—including those in hybrid Windows/Linux environments—face operational risk. The tag content focuses on the technical root cause, the CVE disclosure timeline, and the broader implications for fleet stability rather than Windows-specific fixes.
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    CVE-2026-43237 AMDGPU Kernel Bug: Stale DMA Fences Trigger Linux Kernel Panic

    CVE-2026-43237, published by NVD on May 6, 2026 after disclosure from kernel.org, is a Linux kernel amdgpu driver flaw in amdgpu_gem_va_ioctl that can trigger stale or freed DMA fence use during AMD GPU virtual-address timeline updates. The ugly part is not that a GPU driver can crash; anyone...
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    • amdgpu driver dma fence use-after-free linux kernel security msrc cve tracking
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    • Forum: Security Alerts
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