CVE-2026-43128 (GCVE-0-2026-43128)
Vulnerability from cvelistv5
Published
2026-05-06 11:27
Modified
2026-10-19 19:06
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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).
References
Impacted products
Vendor Product Version
Linux Linux Version: 1e4df4a21c5ac722df1099eee30cad9246c889b5
Version: 1e4df4a21c5ac722df1099eee30cad9246c889b5
Version: 1e4df4a21c5ac722df1099eee30cad9246c889b5
Version: 1e4df4a21c5ac722df1099eee30cad9246c889b5
Version: 1e4df4a21c5ac722df1099eee30cad9246c889b5
Version: 1e4df4a21c5ac722df1099eee30cad9246c889b5
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