CVE-2026-43128RDMA/umem: Fix double dma_buf_unpin in failure path
Updated under an hour ago ()
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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).
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1e4df4a21c5ac722df1099eee30cad9246c889b5 before 70542b69abff34d24b11ae0bb200cc7a766d18df; from 1e4df4a21c5ac722df1099eee30cad9246c889b5 before b324327ff6f48d8065dca67eb3b91357e72726bd; from 1e4df4a21c5ac722df1099eee30cad9246c889b5 before ba3bf0f1bf1d5d0404678485e872980532fcc2c4; from 1e4df4a21c5ac722df1099eee30cad9246c889b5 before d3e32e2f3262f1b25d77c085ace38e2cc4ad75cf; from 1e4df4a21c5ac722df1099eee30cad9246c889b5 before 40126bcbefa79ea86672e05dae608596bab38319; from 1e4df4a21c5ac722df1099eee30cad9246c889b5 before 104016eb671e19709721c1b0048dd912dc2e96be | CNA record |
linux linux_kernel linux:linux_kernel | from 5.16 before 6.1.165; from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.16; from 6.19 before 6.19.6; 7.0 | NVD |
References
- https://git.kernel.org/stable/c/70542b69abff34d24b11ae0bb200cc7a766d18dfpatch
- https://git.kernel.org/stable/c/b324327ff6f48d8065dca67eb3b91357e72726bdpatch
- https://git.kernel.org/stable/c/ba3bf0f1bf1d5d0404678485e872980532fcc2c4patch
- https://git.kernel.org/stable/c/d3e32e2f3262f1b25d77c085ace38e2cc4ad75cfpatch
- https://git.kernel.org/stable/c/40126bcbefa79ea86672e05dae608596bab38319patch
- https://git.kernel.org/stable/c/104016eb671e19709721c1b0048dd912dc2e96bepatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.