Answer in brief
CVE-2026-43128 records a High severity (CVSS 7.8) vulnerability in RDMA/umem: Fix double dma_buf_unpin in failure path. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1e4df4a21c5ac722df1099eee30cad9246c889b5 <70542b69abff34d24b11ae0bb200cc7a766d18df || >=1e4df4a21c5ac722df1099eee30cad9246c889b5 <b324327ff6f48d8065dca67eb3b91357e72726bd || >=1e4df4a21c5ac722df1099eee30cad9246c889b5 <ba3bf0f1bf1d5d0404678485e872980532fcc2c4 || >=1e4df4a21c5ac722df1099eee30cad9246c889b5 <d3e32e2f3262f1b25d77c085ace38e2cc4ad75cf || >=1e4df4a21c5ac722df1099eee30cad9246c889b5 <40126bcbefa79ea86672e05dae608596bab38319 || >=1e4df4a21c5ac722df1099eee30cad9246c889b5 <104016eb671e19709721c1b0048dd912dc2e96be | 70542b69abff34d24b11ae0bb200cc7a766d18df, b324327ff6f48d8065dca67eb3b91357e72726bd, ba3bf0f1bf1d5d0404678485e872980532fcc2c4, d3e32e2f3262f1b25d77c085ace38e2cc4ad75cf, 40126bcbefa79ea86672e05dae608596bab38319, 104016eb671e19709721c1b0048dd912dc2e96be |
| Linux/Linuxgeneric | 5.16 | Not reported |
Published upstream
May 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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).
Quoted source text, attributed separately from HOL analysis.