{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "922f56e9a795d6f3dd72d3428ebdd7ee040fa855"
            },
            {
              "fixed": "69904608e25e8ba58111aadd9210892cf3876201"
            },
            {
              "fixed": "72cfcb79026cffb6490f5044153a841d360b0cfc"
            },
            {
              "fixed": "668e050429c7ca688cf4e7112f97f0cd269d446b"
            },
            {
              "fixed": "c0c6f4ba8a37688f7b4d4044898d88f0450d44c2"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "18cead61e437f4c7898acca0a5f3df12f801d97f"
            },
            {
              "last_affected": "4df1f2d36bdc9a368650bf14b9097c555e95f71d"
            },
            {
              "last_affected": "63546395a0e6ac264f78f65218086ce6014b4494"
            },
            {
              "last_affected": "6f5780536181d1d0d09a11a1bc92f22e143447e2"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.10.177"
            },
            {
              "fixed": "5.11"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.15.105"
            },
            {
              "fixed": "5.16"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.1.22"
            },
            {
              "fixed": "6.2"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "6.2.9"
            },
            {
              "fixed": "6.3"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.3.0"
            },
            {
              "fixed": "6.12.111"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.53"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98014.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: E-Switch, prevent mc_list repopulation during vport disable\n\nIn mlx5_esw_vport_disable(), move esw_apply_vport_rx_mode() ahead\nof esw_vport_change_handle_locked() so vport-\u003eallmulti_rule is\nNULL before the change handler observes it.\n\nDuring FW-fatal recovery the disable runs while dev-\u003estate ==\nINTERNAL_ERROR. The promisc query inside esw_update_vport_rx_mode()\nfails and returns early, leaving vport-\u003eallmulti_rule intact, so\nesw_update_vport_mc_promisc() runs and adds MLX5_ACTION_ADD entries\nto vport-\u003emc_list whose flow rules are then installed in the FDB\nby esw_add_mc_addr(). esw_destroy_legacy_table() tears down the\nFDB with those refs still held, corrupting the sub-tree and\nleaving dangling flow_rule pointers in vport-\u003emc_list.\n\nTwo-stage failure on `echo 1 \u003e /sys/bus/pci/devices/\u003cbdf\u003e/reset`:\n\n  refcount_t: underflow; use-after-free.\n   tree_put_node+0xef/0x110 [mlx5_core]\n   clean_tree+0x44/0xd0 [mlx5_core] (x5)\n   mlx5_fs_core_cleanup+0x57/0x1c0 [mlx5_core]\n   mlx5_unload+0x65/0xd0 [mlx5_core]\n   ... mlx5_health_try_recover\n\n  BUG: unable to handle page fault for address: 0000000003000055\n   down_write+0x1c/0x60\n   mlx5_del_flow_rules+0x33/0x1f0 [mlx5_core]\n   esw_del_mc_addr+0x7b/0x170 [mlx5_core]\n   esw_apply_vport_addr_list+0x56/0xf0 [mlx5_core]\n   esw_vport_change_handle_locked+0x28b/0x310 [mlx5_core]\n   mlx5_esw_vport_enable+0x270/0x4a0 [mlx5_core]\n   ... mlx5_load ... mlx5_health_try_recover\n\nesw_apply_vport_rx_mode(false, false) clears vport-\u003eallmulti_rule\nvia its local state machine even when the FW del fails. With the\nrule NULL the !IS_ERR_OR_NULL(allmulti_rule) gate in the change\nhandler closes, no rules are installed during disable, and the\nreload starts with a clean mc_list.",
  "id": "CVE-2026-98014",
  "modified": "2026-09-27T03:30:43.483805649Z",
  "published": "2026-09-25T10:23:37.131Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/668e050429c7ca688cf4e7112f97f0cd269d446b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/69904608e25e8ba58111aadd9210892cf3876201"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/72cfcb79026cffb6490f5044153a841d360b0cfc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c0c6f4ba8a37688f7b4d4044898d88f0450d44c2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98014.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98014"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "net/mlx5: E-Switch, prevent mc_list repopulation during vport disable"
}