{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "9ee11f0fff205b4b3df9750bff5e94f97c71b6a0"
            },
            {
              "fixed": "c7e8971abd70e9d022f1c251ba2508f8dc7f2db8"
            },
            {
              "fixed": "09cbfd4b81ae90963dadb1de99b63b702e73290a"
            },
            {
              "fixed": "1dca7e491f070ac49b3d934f16ee953a53b37f38"
            },
            {
              "fixed": "902daac307eb7e1955ce05b071950f3cba88c963"
            },
            {
              "fixed": "abdd03229414b5a52943b65a60f34b84cea5ac59"
            },
            {
              "fixed": "cf75eb6617042c8cff6112daeed7791809fc9dd2"
            },
            {
              "fixed": "d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.15.0"
            },
            {
              "fixed": "5.15.210"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.176"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.143"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.92"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.34"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64116.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: ioam: add NULL check for idev in ipv6_hop_ioam()\n\nReported by Sashiko:\n\nThe function ipv6_hop_ioam() accesses\n__in6_dev_get(skb-\u003edev)-\u003ecnf.ioam6_enabled without validating the returned\nidev pointer. Because addrconf_ifdown() can concurrently clear dev-\u003eip6_ptr\nvia RCU, __in6_dev_get() can return NULL during interface teardown, which\ncould cause a NULL pointer dereference when processing an IOAM Hop-by-Hop\noption.\n\nLet's add a check and use SKB_DROP_REASON_IPV6DISABLED accordingly.",
  "id": "CVE-2026-64116",
  "modified": "2026-07-22T05:29:43.525562098Z",
  "published": "2026-07-19T15:40:16.240Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/09cbfd4b81ae90963dadb1de99b63b702e73290a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1dca7e491f070ac49b3d934f16ee953a53b37f38"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/902daac307eb7e1955ce05b071950f3cba88c963"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/abdd03229414b5a52943b65a60f34b84cea5ac59"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c7e8971abd70e9d022f1c251ba2508f8dc7f2db8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf75eb6617042c8cff6112daeed7791809fc9dd2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d4ea0dfd75011b78cebf3808f98ac4c4f51a6fb9"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64116.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64116"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ipv6: ioam: add NULL check for idev in ipv6_hop_ioam()"
}