NVIDIA Linux GPU driver: unprivileged Xid 31 MMU fault via undocumented peer-teardown ordering, no CVE (vendor: intended)

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Original (extern): Link oeffnen
Veroeffentlicht: 2026-08-26 15:26 UTC
Importiert: 2026-08-26 15:51 UTC
Quelle-ID: full_disc
uid_hash: 03c3c5c4dfb406e1f61b89a7499b82463187fe6d224f3560ca3c77ef15f02e57

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Posted by Abhinav Agarwal on Aug 26 NVIDIA Linux GPU driver - unprivileged Xid 31 copy-engine MMU fault

during an NVLink peer transfer

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An unprivileged local user with no GPU group, no admin group and no

capabilities, using only the driver's default 0666 /dev/nvidia*

permissions and public CUDA Runtime APIs, deterministically causes a

PID-attributed copy-engine MMU fault (Xid 31)...

No data

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