{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2"
            },
            {
              "fixed": "959d1829d1ce8b91b435b24a923b51bcc8897090"
            },
            {
              "fixed": "fe336bab13834394320997de8b16ca4a913b4f13"
            },
            {
              "fixed": "5a54f8b7f7fe207a5c14713015a5820588faf1ad"
            },
            {
              "fixed": "b89249819a7d6698bed152feafd3bc6c08489d15"
            },
            {
              "fixed": "dd55c0ea87bf70e4e4b3b683acd29ef981335b26"
            },
            {
              "fixed": "191239b0939692e92459d8d32cad14247fa93f89"
            },
            {
              "fixed": "d9cf4ac6f326330e1fe4d95671d36a6ff3593f64"
            },
            {
              "fixed": "82313c169eddc02b1bf5ba6b427803e272d3ec42"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.12"
            },
            {
              "fixed": "5.10.271"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.222"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.189"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.158"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.112"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.55"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98485.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ip6t_rt: fix zero-address non-strict match out-of-bounds read\n\nrt_mt6_check() permits rules to be configured with rtinfo-\u003eaddrnr == 0\neven when address matching (IP6T_RT_FST_MASK) is requested.\n\nIn the IP6T_RT_FST_NSTRICT path, rt_mt6() evaluates packet routing\naddresses against rtinfo-\u003eaddrs[i] and terminates backwards at the bottom\nof the loop:\n\n    if (ipv6_addr_equal(ap, \u0026rtinfo-\u003eaddrs[i])) {\n        i++;\n    }\n    if (i == rtinfo-\u003eaddrnr)\n        break;\n\nWhen addrnr is 0, if the first packet address matches rtinfo-\u003eaddrs[0],\ni is incremented to 1. Because i is now strictly greater than addrnr (0),\nthe loop termination condition (i == rtinfo-\u003eaddrnr) is bypassed and will\nnever be satisfied.\n\nIf a crafted IPv6 packet contains matching routing addresses, i will\nadvance past IP6T_RT_HOPS (16). The subsequent call to ipv6_addr_equal()\nreads beyond struct ip6t_rt, triggering UBSAN/KASAN out-of-bounds warnings\nor kernel panics.\n\nFix this by:\n1. Rejecting rules in rt_mt6_check() where IP6T_RT_FST_MASK is set but\n   rtinfo-\u003eaddrnr is zero.\n2. In rt_mt6(), moving the termination condition (i \u003c rtinfo-\u003eaddrnr)\n   into the for-loop header condition and removing the backwards break\n   at the end of the loop body.",
  "id": "CVE-2026-98485",
  "modified": "2026-10-20T02:30:58.821177127Z",
  "published": "2026-10-18T15:16:00.435Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/191239b0939692e92459d8d32cad14247fa93f89"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a54f8b7f7fe207a5c14713015a5820588faf1ad"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/82313c169eddc02b1bf5ba6b427803e272d3ec42"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/959d1829d1ce8b91b435b24a923b51bcc8897090"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b89249819a7d6698bed152feafd3bc6c08489d15"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d9cf4ac6f326330e1fe4d95671d36a6ff3593f64"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd55c0ea87bf70e4e4b3b683acd29ef981335b26"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fe336bab13834394320997de8b16ca4a913b4f13"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98485.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98485"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "netfilter: ip6t_rt: fix zero-address non-strict match out-of-bounds read"
}