{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "29c5d4afba51c71cfeadd3f74f3c42e064483fb0"
            },
            {
              "fixed": "296f18e1c3a87c915a92ed27832d5040a22d1072"
            },
            {
              "fixed": "9e2182865de781c41ab16b7985e9d26dcefea867"
            },
            {
              "fixed": "57cc509d82b46150a11dcecc8b25eaa177eda34d"
            },
            {
              "fixed": "368c22aea490f6f50df831b4f9e3623787686c5b"
            },
            {
              "fixed": "d1399632ba255d2e02c757af5d9f5d9279ce168c"
            },
            {
              "fixed": "d552bcfca323d175664d7444989b04f55666978a"
            },
            {
              "fixed": "15d209bccf9273b4a8b4e579ba0e92d065b6ec8c"
            },
            {
              "fixed": "1f3083aec8836213da441270cdb1ab612dd82cf4"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.23"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.136"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.83"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.24"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43085.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_log: initialize nfgenmsg in NLMSG_DONE terminator\n\nWhen batching multiple NFLOG messages (inst-\u003eqlen \u003e 1), __nfulnl_send()\nappends an NLMSG_DONE terminator with sizeof(struct nfgenmsg) payload via\nnlmsg_put(), but never initializes the nfgenmsg bytes. The nlmsg_put()\nhelper only zeroes alignment padding after the payload, not the payload\nitself, so four bytes of stale kernel heap data are leaked to userspace\nin the NLMSG_DONE message body.\n\nUse nfnl_msg_put() to build the NLMSG_DONE terminator, which initializes\nthe nfgenmsg payload via nfnl_fill_hdr(), consistent with how\n__build_packet_message() already constructs NFULNL_MSG_PACKET headers.",
  "id": "CVE-2026-43085",
  "modified": "2026-07-15T01:48:51.832582976Z",
  "published": "2026-05-06T07:40:19.915Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/15d209bccf9273b4a8b4e579ba0e92d065b6ec8c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1f3083aec8836213da441270cdb1ab612dd82cf4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/296f18e1c3a87c915a92ed27832d5040a22d1072"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/368c22aea490f6f50df831b4f9e3623787686c5b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/57cc509d82b46150a11dcecc8b25eaa177eda34d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9e2182865de781c41ab16b7985e9d26dcefea867"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d1399632ba255d2e02c757af5d9f5d9279ce168c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d552bcfca323d175664d7444989b04f55666978a"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43085.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43085"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "netfilter: nfnetlink_log: initialize nfgenmsg in NLMSG_DONE terminator"
}