{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1e4df4a21c5ac722df1099eee30cad9246c889b5"
            },
            {
              "fixed": "70542b69abff34d24b11ae0bb200cc7a766d18df"
            },
            {
              "fixed": "b324327ff6f48d8065dca67eb3b91357e72726bd"
            },
            {
              "fixed": "ba3bf0f1bf1d5d0404678485e872980532fcc2c4"
            },
            {
              "fixed": "d3e32e2f3262f1b25d77c085ace38e2cc4ad75cf"
            },
            {
              "fixed": "40126bcbefa79ea86672e05dae608596bab38319"
            },
            {
              "fixed": "104016eb671e19709721c1b0048dd912dc2e96be"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.165"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.128"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.75"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.16"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43128.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/umem: Fix double dma_buf_unpin in failure path\n\nIn ib_umem_dmabuf_get_pinned_with_dma_device(), the call to\nib_umem_dmabuf_map_pages() can fail. If this occurs, the dmabuf\nis immediately unpinned but the umem_dmabuf-\u003epinned flag is still\nset. Then, when ib_umem_release() is called, it calls\nib_umem_dmabuf_revoke() which will call dma_buf_unpin() again.\n\nFix this by removing the immediate unpin upon failure and just let\nthe ib_umem_release/revoke path handle it. This also ensures the\nproper unmap-unpin unwind ordering if the dmabuf_map_pages call\nhappened to fail due to dma_resv_wait_timeout (and therefore has\na non-NULL umem_dmabuf-\u003esgt).",
  "id": "CVE-2026-43128",
  "modified": "2026-07-08T05:36:52.180799552Z",
  "published": "2026-05-06T11:27:17.474Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/104016eb671e19709721c1b0048dd912dc2e96be"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/40126bcbefa79ea86672e05dae608596bab38319"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/70542b69abff34d24b11ae0bb200cc7a766d18df"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b324327ff6f48d8065dca67eb3b91357e72726bd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ba3bf0f1bf1d5d0404678485e872980532fcc2c4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d3e32e2f3262f1b25d77c085ace38e2cc4ad75cf"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43128.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43128"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "RDMA/umem: Fix double dma_buf_unpin in failure path"
}