Tracker / CVE-2026-43128
CVE-2026-43128
High 7.8
In the Linux kernel, the following vulnerability has been resolved: RDMA/umem: Fix double dma_buf_unpin in failure path In ib_umem_dmabuf_get_pinned_with_dma_device(), the call to ib_umem_dmabuf_map_pages() can fail. If this occurs, the dmabuf is immediately unpinned but the umem_dmabuf->pinned flag is still set. Then, when ib_umem_release() is called, it calls ib_umem_dmabuf_revoke() which will call dma_buf_unpin() again. Fix this by removing the immediate unpin upon failure and just let the ib_umem_release/revoke path handle it. This also ensures the proper unmap-unpin unwind ordering if the dmabuf_map_pages call happened to fail due to dma_resv_wait_timeout (and therefore has a non-NULL umem_dmabuf->sgt).
Affected products and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 5.16 → 6.1.165 |
| linux | linux_kernel · 6.13 → 6.18.16 |
| linux | linux_kernel · 6.19 → 6.19.6 |
| linux | linux_kernel · 6.2 → 6.6.128 |
| linux | linux_kernel · 6.7 → 6.12.75 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.