{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "a3a48de5eade770e911d35291217bdd69ce04ef1"
            },
            {
              "fixed": "5bc8fc1d2ff802eec839e03adef5df597421898d"
            },
            {
              "fixed": "2c54dff57606590fa4abec46bab6bea3133f1539"
            },
            {
              "fixed": "79370b573e92e8f190eb5f9a511fa5398340d8b2"
            },
            {
              "fixed": "54a3c27b357dfb34f327f89bfadeb998bef8051e"
            },
            {
              "fixed": "dcd9b465965422b9654f6026e8a2fa8984f74c3c"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.4.0"
            },
            {
              "fixed": "6.6.148"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "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-2026-68116.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: mdb: Fix source list corruption on a failed replace\n\nWhen replacing the source list of an MDB remote entry, all existing\nsources are first marked for deletion and vxlan_mdb_remote_srcs_add()\nis then called to add the new source list. Sources present in the new\nlist have their deletion mark cleared, and any sources left marked\nafterwards are removed.\n\nIf vxlan_mdb_remote_srcs_add() fails partway through, its error path\ndeletes all entries on the remote's source list. That rollback is only\ncorrect for its other caller, vxlan_mdb_remote_add(), where the remote\nwas just allocated and the list contains solely entries added during\nthe call. On the replace path the list also holds pre-existing sources,\nso a failed replace tears them down together with their (S, G)\nforwarding entries instead of leaving the entry unchanged.\n\nThis is reachable from an existing (*, G) remote. An EXCLUDE filter\nthat loses sources starts forwarding traffic that should be blocked,\nwhile an INCLUDE filter that loses sources drops traffic that should be\nforwarded.\n\nMark entries created during the current pass with a new\nVXLAN_SGRP_F_NEW flag. On failure, delete only those entries and clear\nthe deletion mark on the pre-existing ones, so a failed replace leaves\nthe source list untouched. Retain the flag until the whole operation\nsucceeds and then clear it. Also stop vxlan_mdb_remote_src_add() from\ndeleting a pre-existing entry it only looked up when adding that\nentry's forwarding entry fails.",
  "id": "CVE-2026-68116",
  "modified": "2026-08-18T03:31:18.001583216Z",
  "published": "2026-08-10T11:58:34.612Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2c54dff57606590fa4abec46bab6bea3133f1539"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/54a3c27b357dfb34f327f89bfadeb998bef8051e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5bc8fc1d2ff802eec839e03adef5df597421898d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/79370b573e92e8f190eb5f9a511fa5398340d8b2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dcd9b465965422b9654f6026e8a2fa8984f74c3c"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68116.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68116"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "vxlan: mdb: Fix source list corruption on a failed replace"
}