Vulnerability-Lookup

FKIE_CVE-2026-53224

Vulnerability from fkie_nvd - Published: 2026-06-25 09:16 - Updated: 2026-07-02 20:46

Severity

9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: sctp: validate embedded INIT chunk and address list lengths in cookie sctp_unpack_cookie() only checked that the embedded INIT chunk length did not exceed the remaining cookie payload, but did not ensure that the INIT chunk is large enough to contain a complete INIT header. A malformed COOKIE_ECHO can therefore carry a truncated INIT chunk whose length field is smaller than sizeof(struct sctp_init_chunk). Later, sctp_process_init() accesses INIT parameters unconditionally, which may lead to out-of-bounds reads. In addition, raw_addr_list_len is not fully validated against the remaining cookie payload. When cookie authentication is disabled, an attacker can supply an oversized raw_addr_list_len and cause sctp_raw_to_bind_addrs() to read beyond the end of the cookie. The address parser also lacks sufficient bounds checks for parameter headers and lengths, allowing malformed address parameters to trigger out-of-bounds reads. Fix this by: - requiring the embedded INIT chunk length to be at least sizeof(struct sctp_init_chunk); - validating that the INIT chunk and raw address list together fit within the cookie payload; - verifying sufficient data exists for each address parameter header and payload before parsing it. Note that sctp_verify_init() must be called after sctp_unpack_cookie() and before sctp_process_init() when cookie authentication is disabled. This will be addressed in a separate patch.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/512a9bb77c04ac9927648ea58af617e472be96e6	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6f4c80a2a7e6d06753b89a578b710a2499a5e62b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7560afb8cddafd829e709d7ea09230e45a825557	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	2.6.12
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1
linux	linux_kernel	7.1

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sctp/bind_addr.c",
            "net/sctp/sm_make_chunk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7560afb8cddafd829e709d7ea09230e45a825557",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "512a9bb77c04ac9927648ea58af617e472be96e6",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "6f4c80a2a7e6d06753b89a578b710a2499a5e62b",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/sctp/bind_addr.c",
            "net/sctp/sm_make_chunk.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": "6.18.*",
              "status": "unaffected",
              "version": "6.18.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "7B16CDFB-88A3-4EB6-8F8A-9A54E1C4771F",
              "versionEndExcluding": "6.18.36",
              "versionStartIncluding": "2.6.12.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6A64BF9F-3BCA-42FD-98CB-8F03474D2B1E",
              "versionEndExcluding": "7.0.13",
              "versionStartIncluding": "6.19",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:*",
              "matchCriteriaId": "6F62EECE-8FB1-4D57-85D8-CB9E23CF313C",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "4F76C298-81DC-43E4-8FC9-DC005A2116EF",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "0AB349B2-3F78-4197-882B-90ADB3BF645A",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "6AC88830-A9BC-4607-B572-A4B502FC9FD0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "476CB3A5-D022-4F13-AAEF-CB6A5785516A",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "E5910A9D-F60A-409A-B486-FE66BFEBA9B9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "81DFF19E-9CF8-49C6-8C36-1E4038622933",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*",
              "matchCriteriaId": "B0E8FC71-3952-444C-83E9-718DBBBEC615",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.1:rc7:*:*:*:*:*:*",
              "matchCriteriaId": "1039E95A-8CC3-4C88-8FF9-5C08EEB861C9",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: validate embedded INIT chunk and address list lengths in cookie\n\nsctp_unpack_cookie() only checked that the embedded INIT chunk length\ndid not exceed the remaining cookie payload, but did not ensure that the\nINIT chunk is large enough to contain a complete INIT header.\n\nA malformed COOKIE_ECHO can therefore carry a truncated INIT chunk whose\nlength field is smaller than sizeof(struct sctp_init_chunk).  Later,\nsctp_process_init() accesses INIT parameters unconditionally, which may\nlead to out-of-bounds reads.\n\nIn addition, raw_addr_list_len is not fully validated against the\nremaining cookie payload. When cookie authentication is disabled, an\nattacker can supply an oversized raw_addr_list_len and cause\nsctp_raw_to_bind_addrs() to read beyond the end of the cookie. The\naddress parser also lacks sufficient bounds checks for parameter headers\nand lengths, allowing malformed address parameters to trigger\nout-of-bounds reads.\n\nFix this by:\n\n- requiring the embedded INIT chunk length to be at least sizeof(struct\n  sctp_init_chunk);\n- validating that the INIT chunk and raw address list together fit\n  within the cookie payload;\n- verifying sufficient data exists for each address parameter header and\n  payload before parsing it.\n\nNote that sctp_verify_init() must be called after sctp_unpack_cookie()\nand before sctp_process_init() when cookie authentication is disabled.\nThis will be addressed in a separate patch."
    }
  ],
  "id": "CVE-2026-53224",
  "lastModified": "2026-07-02T20:46:53.373",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-06-25T09:16:40.200",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/512a9bb77c04ac9927648ea58af617e472be96e6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/6f4c80a2a7e6d06753b89a578b710a2499a5e62b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/7560afb8cddafd829e709d7ea09230e45a825557"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-53224 (GCVE-0-2026-53224)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:39 – Updated: 2026-08-05 12:34

Title

sctp: validate embedded INIT chunk and address list lengths in cookie

Summary

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/7560afb8cddafd829…
https://git.kernel.org/stable/c/512a9bb77c04ac992…
https://git.kernel.org/stable/c/6f4c80a2a7e6d0675…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7560afb8cddafd829e709d7ea09230e45a825557 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 512a9bb77c04ac9927648ea58af617e472be96e6 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6f4c80a2a7e6d06753b89a578b710a2499a5e62b (git)
Linux	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (semver) Unaffected: 6.18.36 , ≤ 6.18.* (semver) Unaffected: 7.0.13 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/sctp/bind_addr.c",
            "net/sctp/sm_make_chunk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "7560afb8cddafd829e709d7ea09230e45a825557",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "512a9bb77c04ac9927648ea58af617e472be96e6",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "6f4c80a2a7e6d06753b89a578b710a2499a5e62b",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/sctp/bind_addr.c",
            "net/sctp/sm_make_chunk.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": "6.18.*",
              "status": "unaffected",
              "version": "6.18.36",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.36",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.13",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsctp: validate embedded INIT chunk and address list lengths in cookie\n\nsctp_unpack_cookie() only checked that the embedded INIT chunk length\ndid not exceed the remaining cookie payload, but did not ensure that the\nINIT chunk is large enough to contain a complete INIT header.\n\nA malformed COOKIE_ECHO can therefore carry a truncated INIT chunk whose\nlength field is smaller than sizeof(struct sctp_init_chunk).  Later,\nsctp_process_init() accesses INIT parameters unconditionally, which may\nlead to out-of-bounds reads.\n\nIn addition, raw_addr_list_len is not fully validated against the\nremaining cookie payload. When cookie authentication is disabled, an\nattacker can supply an oversized raw_addr_list_len and cause\nsctp_raw_to_bind_addrs() to read beyond the end of the cookie. The\naddress parser also lacks sufficient bounds checks for parameter headers\nand lengths, allowing malformed address parameters to trigger\nout-of-bounds reads.\n\nFix this by:\n\n- requiring the embedded INIT chunk length to be at least sizeof(struct\n  sctp_init_chunk);\n- validating that the INIT chunk and raw address list together fit\n  within the cookie payload;\n- verifying sufficient data exists for each address parameter header and\n  payload before parsing it.\n\nNote that sctp_verify_init() must be called after sctp_unpack_cookie()\nand before sctp_process_init() when cookie authentication is disabled.\nThis will be addressed in a separate patch."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - An unauthenticated remote SCTP peer can reach the vulnerable COOKIE_ECHO processing path by sending SCTP packets to a listening SCTP endpoint. In deployments with cookie HMAC disabled, the attacker can obtain and modify the state cookie over the network.\nAC:L - The bug is triggered with a malformed COOKIE_ECHO and attacker-controlled embedded INIT/address-list lengths; no race or hard-to-control timing condition is required. The no-cookie-auth deployment condition is a reasonable supported SCTP configuration.\nPR:N - No credentials or local privileges are needed to send SCTP INIT/COOKIE_ECHO traffic to a listening service. The vulnerable parsing occurs before any application authentication.\nUI:N - Exploitation only requires sending network packets to the target SCTP endpoint. No victim user action is required.\nS:U - The impact is within the kernel/network stack security authority of the target system. It does not cross a separate boundary such as guest-to-host or IOMMU isolation.\nC:H - The malformed lengths can drive out-of-bounds kernel reads beyond the COOKIE_ECHO payload, including attacker-controlled oversized address-list parsing. Because the read is not strictly bounded to a few bytes and related SCTP COOKIE_ECHO bugs demonstrate kernel memory leakage potential, confidentiality impact is High.\nI:N - The investigated fix addresses out-of-bounds reads and missing length validation, not an out-of-bounds write or direct arbitrary memory modification primitive. I did not find a defensible direct integrity impact from this bug alone.\nA:H - The attacker-controlled out-of-bounds reads can walk beyond the skb/cookie buffer and fault or trigger KASAN/oops conditions. A remotely triggerable kernel crash is High availability impact."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:34:16.814Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7560afb8cddafd829e709d7ea09230e45a825557"
        },
        {
          "url": "https://git.kernel.org/stable/c/512a9bb77c04ac9927648ea58af617e472be96e6"
        },
        {
          "url": "https://git.kernel.org/stable/c/6f4c80a2a7e6d06753b89a578b710a2499a5e62b"
        }
      ],
      "title": "sctp: validate embedded INIT chunk and address list lengths in cookie",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53224",
    "datePublished": "2026-06-25T08:39:25.254Z",
    "dateReserved": "2026-06-09T07:44:35.392Z",
    "dateUpdated": "2026-08-05T12:34:16.814Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.