{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "7597385371425febdaa8c6a1da3625d4ffff16f5"
            },
            {
              "fixed": "6e15b770461eeaa0ff73934922cb670a6a9db04e"
            },
            {
              "fixed": "9be9aca28424228586fe9211c373ebdb826ebb6c"
            },
            {
              "fixed": "f345e744b6b087188cde2377da5cbe9713b61353"
            },
            {
              "fixed": "1025dc2f7ba29b04b8687790fa91f9cd1a53141e"
            },
            {
              "fixed": "7921821fc2b19c01588311f6e7468ae5b68b1f61"
            },
            {
              "fixed": "5100febf8e9d6c8c5ba8dc6534c6a5e3376e5989"
            },
            {
              "fixed": "78b9589fda266c71f0f9d0c858d4fa7381a890a5"
            },
            {
              "fixed": "43f8f7946814c8e5f464518246fdbc69b6e32326"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.3.0"
            },
            {
              "fixed": "5.10.261"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.212"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.178"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.145"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.97"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.40"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74395.json"
  },
  "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-\u003eev_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.",
  "id": "CVE-2026-74395",
  "modified": "2026-08-18T03:31:28.534532334Z",
  "published": "2026-08-15T05:59:07.798Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1025dc2f7ba29b04b8687790fa91f9cd1a53141e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/43f8f7946814c8e5f464518246fdbc69b6e32326"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5100febf8e9d6c8c5ba8dc6534c6a5e3376e5989"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6e15b770461eeaa0ff73934922cb670a6a9db04e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/78b9589fda266c71f0f9d0c858d4fa7381a890a5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7921821fc2b19c01588311f6e7468ae5b68b1f61"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9be9aca28424228586fe9211c373ebdb826ebb6c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f345e744b6b087188cde2377da5cbe9713b61353"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74395.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74395"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "RDMA/mlx5: Fix devx subscribe-event unwind NULL dereference"
}