{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.113-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.9-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  net: bridge: mdb: restart port group walk after deletion  br_mdb_flush_pgs() keeps a pointer-to-pointer cursor while walking mp-\u003eports. br_multicast_del_pg() can re-enter the same MDB entry through br_multicast_sg_del_exclude_ports() and unlink other port groups. If the cursor points into one of those groups, the next iteration dereferences a stale cursor and can leave mp-\u003eports pointing at freed memory.  A following RTM_GETMDB exposes the dangling pointer:    BUG: KASAN: slab-use-after-free in br_mdb_dump   Read of size 8     br_mdb_dump     rtnl_mdb_dump     rtnl_dumpit     netlink_dump  Reset the cursor to mp-\u003eports after every deletion. The deletion removes at least the selected group, so the restarted walk always makes progress.",
  "id": "DEBIAN-CVE-2026-98487",
  "modified": "2026-10-19T04:47:45.042291450Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-98487"
    }
  ],
  "upstream": [
    "CVE-2026-98487"
  ]
}