Detections
Analytics
CVE-2026-74334
high
Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/nldev: Fix locking when accessing mr->pd Sashiko points out that, due to rereg_mr, the PD is actually variable and all the touches in nldev are racy. Use mr->device instead of mr->pd->device. Getting the PD restrack ID is more tricky. To avoid disturbing all the happy paths, add an rdma_restrack_sync() operation which is sort of like flush_workqueue() or synchronize_irq(): after it returns, all the old nldev touches to the mr are gone and everything sees the new PD. This makes it safe to reach into the PD pointer.
References
https://git.kernel.org/stable/c/a07cba1296aaa81bf9b914486ca957aaff196247
https://git.kernel.org/stable/c/845c6b355226195dad1f26b300c4830f57034e8b
https://git.kernel.org/stable/c/7a0cbb5721a1da81e902d73b6049f85ca8f3fc0a
https://git.kernel.org/stable/c/50d5c02ab8e62325548bd3a6e6b758a9dcd6e7c3
https://git.kernel.org/stable/c/1a132ee4e655288d9a0937ea5109a0d038431ae9
https://git.kernel.org/stable/c/05e26f34597e9c38bb5b340d86b179b23673869f