{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "bf11485f8419f90ffaa3804fd01d8468fcc56e23"
            },
            {
              "fixed": "c698b2735613f1f35c55688bd2252f75f31c49ad"
            },
            {
              "fixed": "40f9a124ebbe0d60fe165fb3f87515c35b2d72f5"
            },
            {
              "fixed": "a60c81f168c9fe4f5d84302d1e32b717f5a8a933"
            },
            {
              "fixed": "e32649b4bad90a6216d8e93cd7dd050af8ac9740"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.101"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.42"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.1.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68139.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5e: Use sender devcom for MPV master-up\n\nAfter PCIe DPC recovery, mlx5 reloads the affected functions and\nreplays multiport affiliation events. In the reported failure, the\nfirst relevant device error was:\n\n  pcieport 0000:10:01.1: DPC: containment event\n  pcieport 0000:10:01.1: PCIe Bus Error: severity=Uncorrected (Fatal)\n  pcieport 0000:10:01.1:    [ 5] SDES                   (First)\n\nmlx5 recovered the PCI functions and resumed 0000:11:00.1. During\nthat resume, RDMA multiport binding replayed\nMLX5_DRIVER_EVENT_AFFILIATION_DONE and mlx5e sent\nMPV_DEVCOM_MASTER_UP. The host then panicked with:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000010\n  RIP: mlx5_devcom_comp_set_ready+0x5/0x40 [mlx5_core]\n  RDI: 0000000000000000\n\nCall trace included:\n\n  mlx5_devcom_comp_set_ready\n  mlx5e_devcom_event_mpv\n  mlx5_devcom_send_event\n  mlx5_ib_bind_slave_port\n  mlx5r_mp_probe\n  mlx5_pci_resume\n\nMPV devcom registration publishes mlx5e private data to the component\npeer list before mlx5e_devcom_init_mpv() stores the returned component\ndevice in priv-\u003edevcom. A concurrent master-up event can therefore\nreach a peer whose private data is visible but whose priv-\u003edevcom\nbackpointer is still NULL.\n\nMPV_DEVCOM_MASTER_UP already carries the sender/master mlx5e private\ndata as event_data. The ready bit is stored on the shared devcom\ncomponent, not on an individual peer. Use the sender devcom when\nmarking the MPV component ready.\n\nThis preserves the readiness transition while avoiding a NULL\ndereference of the peer devcom pointer during affiliation replay after\nPCI error recovery.",
  "id": "CVE-2026-68139",
  "modified": "2026-08-18T03:30:58.186966968Z",
  "published": "2026-08-10T11:59:02.768Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/40f9a124ebbe0d60fe165fb3f87515c35b2d72f5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a60c81f168c9fe4f5d84302d1e32b717f5a8a933"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c698b2735613f1f35c55688bd2252f75f31c49ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e32649b4bad90a6216d8e93cd7dd050af8ac9740"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68139.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68139"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "net/mlx5e: Use sender devcom for MPV master-up"
}