{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "1f485649f52929d9937b346a920a522a7363e202"
            },
            {
              "fixed": "0b4414e43e0861d67276031cc21401d7e87de3da"
            },
            {
              "fixed": "d0a59ba58578e2b330fff80a44fe519f3ba7d8c7"
            },
            {
              "fixed": "a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db"
            },
            {
              "fixed": "3aa40c3bccac2312ea7cf97f329190637f972b5d"
            },
            {
              "fixed": "e0b5252a59383b77d1b8dbeda00b7184dd95f4d3"
            }
          ],
          "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-2026-68376.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix auth_hmacs array size in struct sctp_cookie\n\nThe auth_hmacs array in struct sctp_cookie is supposed to store a complete\nSCTP_AUTH_HMAC_ALGO parameter, which consists of a struct sctp_paramhdr\nfollowed by N HMAC identifiers.\n\nHowever, the array size was calculated using an extra 2 bytes instead of\nsizeof(struct sctp_paramhdr), which is 4 bytes. When four HMAC identifiers\nare configured, the HMAC-ALGO parameter stored in the endpoint is larger\nthan the auth_hmacs buffer in the cookie.\n\nAs a result, sctp_association_init() copies beyond the end of auth_hmacs\nwhen initializing the association, corrupting the adjacent auth_chunks\nfield. This can lead to an invalid HMAC identifier being accepted and later\ncause an out-of-bounds read in sctp_auth_get_hmac().\n\nFix the array size calculation by including the full SCTP parameter header\nsize.",
  "id": "CVE-2026-68376",
  "modified": "2026-08-14T03:51:53.253940009Z",
  "published": "2026-08-10T12:03:54.666Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b4414e43e0861d67276031cc21401d7e87de3da"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3aa40c3bccac2312ea7cf97f329190637f972b5d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d0a59ba58578e2b330fff80a44fe519f3ba7d8c7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e0b5252a59383b77d1b8dbeda00b7184dd95f4d3"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68376.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68376"
    },
    {
      "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:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "sctp: fix auth_hmacs array size in struct sctp_cookie"
}