{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-74395",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-74395"
  ],
  "published": "2026-08-15T06:04:33Z",
  "summary": "RDMA/mlx5: Fix devx subscribe-event unwind NULL dereference",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/mlx5: Fix devx subscribe-event unwind NULL dereference\n\nMLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT() links event_sub into sub_list\nbefore initializing the fields used by the shared error path.\n\nIf eventfd_ctx_fdget() then fails, the unwind path dereferences\nevent_sub->ev_file in uverbs_uobject_put() and calls\nsubscribe_event_xa_dealloc() with an unset xa_key_level1.\n\nsubscribe_event_xa_alloc() creates the XA entry exactly once for a given\nkey_level1, on the first occurrence of that key. The unwind path must\ntherefore call subscribe_event_xa_dealloc() exactly once for it as well.\n\nEnforce that by adding devx_key_in_sub_list() and calling\nsubscribe_event_xa_dealloc() only when the last matching pending entry is\nbeing cleaned up.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.178",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-74395"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/6e15b770461eeaa0ff73934922cb670a6a9db04e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9be9aca28424228586fe9211c373ebdb826ebb6c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f345e744b6b087188cde2377da5cbe9713b61353"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1025dc2f7ba29b04b8687790fa91f9cd1a53141e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7921821fc2b19c01588311f6e7468ae5b68b1f61"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5100febf8e9d6c8c5ba8dc6534c6a5e3376e5989"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/78b9589fda266c71f0f9d0c858d4fa7381a890a5"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/43f8f7946814c8e5f464518246fdbc69b6e32326"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-17T05:24:08Z"
  }
}