{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "df21857714398acb8b24a8bb5a6d2286dd9c59ef"
            },
            {
              "fixed": "446e0ecd845abc394b24ae2030a883572bec9d16"
            },
            {
              "fixed": "928dd94db23e8ba340f83d68f7f24d831b7a4426"
            },
            {
              "fixed": "d796cfd06074b579d265b28401306cadd30db945"
            },
            {
              "fixed": "8ce96f1182644079249a24ac7e2ffc32e0301a46"
            },
            {
              "fixed": "d6bd0bb7697ea8c0387b0d9d973453f479017b23"
            },
            {
              "fixed": "f76a8b323e28e0951f979dbef20a7496383c47df"
            },
            {
              "fixed": "8e86817b8af4d552f3c6fe04ca52bb0c8c57411d"
            },
            {
              "fixed": "f8373d7090b745728de66308deeecc67e8d319ce"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.25"
            },
            {
              "fixed": "5.10.259"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "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": "6.12.94"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.36"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53225.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix uninit-value in __sctp_rcv_asconf_lookup()\n\n__sctp_rcv_asconf_lookup() in net/sctp/input.c only checks that the ASCONF\nchunk can hold the ADDIP header and a parameter header, then calls\naf-\u003efrom_addr_param(), which reads the full address (16 bytes for IPv6)\ntrusting the parameter's declared length.\n\nAn unauthenticated peer can send a truncated trailing ASCONF chunk that\ndeclares an IPv6 address parameter but stops after the 4-byte parameter\nheader; reached from the no-association lookup path, from_addr_param() then\nreads uninitialized bytes past the parameter.\n\nImpact: an unauthenticated SCTP peer makes the receive path read up to 16\nbytes of uninitialized memory past a truncated ASCONF address parameter.\n\nThe sibling __sctp_rcv_init_lookup() bounds parameters with\nsctp_walk_params(); this path open-codes the fetch and omits the bound.\nVerify the whole address parameter lies within the chunk before\nfrom_addr_param() reads it, the same class of fix as commit 51e5ad549c43\n(\"net: sctp: fix KMSAN uninit-value in sctp_inq_pop\").",
  "id": "CVE-2026-53225",
  "modified": "2026-07-08T05:37:48.585274240Z",
  "published": "2026-06-25T08:39:25.911Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/446e0ecd845abc394b24ae2030a883572bec9d16"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8ce96f1182644079249a24ac7e2ffc32e0301a46"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8e86817b8af4d552f3c6fe04ca52bb0c8c57411d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/928dd94db23e8ba340f83d68f7f24d831b7a4426"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d6bd0bb7697ea8c0387b0d9d973453f479017b23"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d796cfd06074b579d265b28401306cadd30db945"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f76a8b323e28e0951f979dbef20a7496383c47df"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f8373d7090b745728de66308deeecc67e8d319ce"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53225.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-53225"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "sctp: fix uninit-value in __sctp_rcv_asconf_lookup()"
}