CVE-2026-72413 (GCVE-0-2026-72413)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:56 – Updated: 2026-09-21 13:13
VLAI
Title
sctp: fix err_chunk memory leaks in INIT handling
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().
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6acedac7a14af71cfe25024ead28e16a070899e4 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 1cae40d423a2042c7970f29c00028951ec20db8a (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 94f55994e19e8f0676990b9d5015b58ab6a97e00 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9f58a0a4d6c2ed5d341bba64f058f15d1b0c36f2 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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        {
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          "product": "Linux",
          "programFiles": [
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          "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()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-21T13:13:50.351Z",
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        "shortName": "Linux"
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    "cveId": "CVE-2026-72413",
    "datePublished": "2026-08-15T05:56:34.857Z",
    "dateReserved": "2026-08-09T03:40:39.926Z",
    "dateUpdated": "2026-09-21T13:13:50.351Z",
    "state": "PUBLISHED"
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        "descriptions": [
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            "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()."
          }
        ],
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        "metrics": {},
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: sctp: fix err_chunk memory leaks in INIT handling",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72413.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-15T01:26:00Z",
      "cve": "CVE-2026-72413",
      "id": "CVE-2026-72413",
      "initial_release_date": "2026-08-27T16:52:51Z",
      "product_status:known_affected": "123",
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-72413",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-72413.json",
      "version": "5"
    }
  }
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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