{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1f485649f52929d9937b346a920a522a7363e202"
            },
            {
              "fixed": "5a365f1e423444c5da7eb689a8661633dad43e48"
            },
            {
              "fixed": "886e28e14ab655012779016d251fef53d103aa12"
            },
            {
              "fixed": "11092d79eb2b7c0068382f72fc2416d1786bb2e0"
            },
            {
              "fixed": "b6ea3dda09eb4d5caf7bbc00f857688cf9e98255"
            },
            {
              "fixed": "ff04b26794a16a8a879eb4fd2c02c2d6b03850e9"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.24"
            },
            {
              "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-2026-68320.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix auth_chunk_list capacity check in sctp_auth_ep_add_chunkid\n\nsctp_auth_ep_add_chunkid() uses SCTP_NUM_CHUNK_TYPES (20) as the\ncapacity limit for ep-\u003eauth_chunk_list, allowing it to hold up to\n20 chunk entries (param_hdr.length up to 24). However, the copy\ndestination asoc-\u003ec.auth_chunks in struct sctp_cookie is only\nSCTP_AUTH_MAX_CHUNKS (16) entries (20 bytes). When more than 16\nchunks are added, sctp_association_init() memcpy overflows the\ndestination by up to 4 bytes.\n\nFix by using SCTP_AUTH_MAX_CHUNKS as the capacity limit, matching\nthe destination capacity.",
  "id": "CVE-2026-68320",
  "modified": "2026-08-14T03:52:01.337133921Z",
  "published": "2026-08-10T12:02:55.144Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/11092d79eb2b7c0068382f72fc2416d1786bb2e0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a365f1e423444c5da7eb689a8661633dad43e48"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/886e28e14ab655012779016d251fef53d103aa12"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b6ea3dda09eb4d5caf7bbc00f857688cf9e98255"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ff04b26794a16a8a879eb4fd2c02c2d6b03850e9"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68320.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68320"
    },
    {
      "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:U/C:L/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "sctp: fix auth_chunk_list capacity check in sctp_auth_ep_add_chunkid"
}