FKIE_CVE-2026-72413

Vulnerability from fkie_nvd - Published: 2026-08-15 06:22 - Updated: 2026-10-03 11:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: sctp: fix err_chunk memory leaks in INIT handling When sctp_verify_init() encounters unrecognized parameters, it allocates an err_chunk to report them. However, this chunk is leaked in several code paths: 1. In sctp_sf_do_5_1B_init(), if security_sctp_assoc_request() fails after sctp_verify_init() has populated err_chunk, the function returns immediately without freeing it. 2. In sctp_sf_do_unexpected_init(), the same leak occurs on the security_sctp_assoc_request() failure path. 3. In sctp_sf_do_unexpected_init(), on the success path after copying unrecognized parameters to the INIT-ACK, the function returns without freeing err_chunk, unlike sctp_sf_do_5_1B_init() which properly frees it. Fix all three leaks by adding sctp_chunk_free(err_chunk) calls before returning in the error paths and on the success path in sctp_sf_do_unexpected_init().
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1cae40d423a2042c7970f29c00028951ec20db8a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/43ddbcdc0ed74a8fba4aff5e623ace8135411b93
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6acedac7a14af71cfe25024ead28e16a070899e4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/94f55994e19e8f0676990b9d5015b58ab6a97e00
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9f58a0a4d6c2ed5d341bba64f058f15d1b0c36f2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a8e6a839c0e7ca1da752faaab51e2eafb17483a4
Impacted products
Vendor Product Version
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{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sctp/sm_statefuns.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "a8e6a839c0e7ca1da752faaab51e2eafb17483a4",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "43ddbcdc0ed74a8fba4aff5e623ace8135411b93",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "6acedac7a14af71cfe25024ead28e16a070899e4",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "1cae40d423a2042c7970f29c00028951ec20db8a",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "94f55994e19e8f0676990b9d5015b58ab6a97e00",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "9f58a0a4d6c2ed5d341bba64f058f15d1b0c36f2",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/sctp/sm_statefuns.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "lessThan": "2.6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: fix err_chunk memory leaks in INIT handling\n\nWhen sctp_verify_init() encounters unrecognized parameters, it allocates an\nerr_chunk to report them. However, this chunk is leaked in several code\npaths:\n\n1. In sctp_sf_do_5_1B_init(), if security_sctp_assoc_request() fails after\n   sctp_verify_init() has populated err_chunk, the function returns\n   immediately without freeing it.\n\n2. In sctp_sf_do_unexpected_init(), the same leak occurs on the\n   security_sctp_assoc_request() failure path.\n\n3. In sctp_sf_do_unexpected_init(), on the success path after copying\n   unrecognized parameters to the INIT-ACK, the function returns without\n   freeing err_chunk, unlike sctp_sf_do_5_1B_init() which properly frees\n   it.\n\nFix all three leaks by adding sctp_chunk_free(err_chunk) calls before\nreturning in the error paths and on the success path in\nsctp_sf_do_unexpected_init()."
    }
  ],
  "id": "CVE-2026-72413",
  "lastModified": "2026-10-03T11:17:37.603",
  "metrics": {},
  "published": "2026-08-15T06:22:14.910",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1cae40d423a2042c7970f29c00028951ec20db8a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/43ddbcdc0ed74a8fba4aff5e623ace8135411b93"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6acedac7a14af71cfe25024ead28e16a070899e4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/94f55994e19e8f0676990b9d5015b58ab6a97e00"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9f58a0a4d6c2ed5d341bba64f058f15d1b0c36f2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a8e6a839c0e7ca1da752faaab51e2eafb17483a4"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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