Vulnerability-Lookup

FKIE_CVE-2024-53206

Vulnerability from fkie_nvd - Published: 2024-12-27 14:15 - Updated: 2026-08-04 11:22

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: tcp: Fix use-after-free of nreq in reqsk_timer_handler(). The cited commit replaced inet_csk_reqsk_queue_drop_and_put() with __inet_csk_reqsk_queue_drop() and reqsk_put() in reqsk_timer_handler(). Then, oreq should be passed to reqsk_put() instead of req; otherwise use-after-free of nreq could happen when reqsk is migrated but the retry attempt failed (e.g. due to timeout). Let's pass oreq to reqsk_put().

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2dcc86fefe09ac853158afd96b60d544af115dc5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/65ed89cad1f57034c256b016e89e8c0a4ec7c65b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6d845028609a4af0ad66f499ee0bd5789122b067	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9a3c1ad93e6fba67b3a637cfa95a57a6685e4908	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c31e72d021db2714df03df6c42855a1db592716c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d0eb14cb8c08b00c36a3d5dc57a6f428b301f721	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/inet_connection_sock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "status": "affected",
              "version": "8459d61fbf24967839a70235165673148c7c7f17",
              "versionType": "git"
            },
            {
              "lessThan": "9a3c1ad93e6fba67b3a637cfa95a57a6685e4908",
              "status": "affected",
              "version": "5071beb59ee416e8ab456ac8647a4dabcda823b1",
              "versionType": "git"
            },
            {
              "lessThan": "65ed89cad1f57034c256b016e89e8c0a4ec7c65b",
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              "version": "997ae8da14f1639ce6fb66a063dab54031cd61b3",
              "versionType": "git"
            },
            {
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              "versionType": "git"
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              "status": "affected",
              "version": "e8c526f2bdf1845bedaf6a478816a3d06fa78b8f",
              "versionType": "git"
            },
            {
              "lessThan": "c31e72d021db2714df03df6c42855a1db592716c",
              "status": "affected",
              "version": "e8c526f2bdf1845bedaf6a478816a3d06fa78b8f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "106e457953315e476b3642ef24be25ed862aaba3",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c964bf65f80a14288d767023a1b300b30f5b9cd0",
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            },
            {
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              "status": "affected",
              "version": "5.15.170",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.120",
              "status": "affected",
              "version": "6.1.115",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.64",
              "status": "affected",
              "version": "6.6.59",
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            },
            {
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              "status": "affected",
              "version": "6.11.6",
              "versionType": "semver"
            },
            {
              "lessThan": "5.5",
              "status": "affected",
              "version": "5.4.293",
              "versionType": "semver"
            },
            {
              "lessThan": "5.11",
              "status": "affected",
              "version": "5.10.237",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/inet_connection_sock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.174",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.120",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.64",
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            },
            {
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              "status": "unaffected",
              "version": "6.11.11",
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            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1984288E-8D42-413D-9278-5C8875307D85",
              "versionEndExcluding": "5.15.174",
              "versionStartIncluding": "5.15.170",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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            {
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              "versionEndExcluding": "6.11.11",
              "versionStartIncluding": "6.11.6",
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            },
            {
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              "versionEndExcluding": "6.12.2",
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          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: Fix use-after-free of nreq in reqsk_timer_handler().\n\nThe cited commit replaced inet_csk_reqsk_queue_drop_and_put() with\n__inet_csk_reqsk_queue_drop() and reqsk_put() in reqsk_timer_handler().\n\nThen, oreq should be passed to reqsk_put() instead of req; otherwise\nuse-after-free of nreq could happen when reqsk is migrated but the\nretry attempt failed (e.g. due to timeout).\n\nLet\u0027s pass oreq to reqsk_put()."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: tcp: Se corrige el use-after-free de nreq en reqsk_timer_handler(). el commit citada reemplaz\u00f3 inet_csk_reqsk_queue_drop_and_put() con __inet_csk_reqsk_queue_drop() y reqsk_put() en reqsk_timer_handler(). Luego, oreq se debe pasar a reqsk_put() en lugar de req; de lo contrario, el use-after-free de nreq podr\u00eda ocurrir cuando se migra reqsk pero el intento de reintento falla (por ejemplo, debido al tiempo de espera). Pasemos oreq a reqsk_put()."
    }
  ],
  "id": "CVE-2024-53206",
  "lastModified": "2026-08-04T11:22:04.873",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-53206",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-02-11T15:43:21.588054Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-12-27T14:15:28.453",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/2dcc86fefe09ac853158afd96b60d544af115dc5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/65ed89cad1f57034c256b016e89e8c0a4ec7c65b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/6d845028609a4af0ad66f499ee0bd5789122b067"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
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    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/c31e72d021db2714df03df6c42855a1db592716c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d0eb14cb8c08b00c36a3d5dc57a6f428b301f721"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}

CVE-2024-53206 (GCVE-0-2024-53206)

Vulnerability from cvelistv5 – Published: 2024-12-27 13:49 – Updated: 2026-08-05 11:44

Title

tcp: Fix use-after-free of nreq in reqsk_timer_handler().

Summary

Severity

9.8 (Critical)


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

7.8 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-02-11 15:43 UTC

CWE

CWE-416 - Use After Free

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7067 records in the last 180 days details

References

7 references

URL	Tags
https://git.kernel.org/stable/c/2dcc86fefe09ac853…
https://git.kernel.org/stable/c/9a3c1ad93e6fba67b…
https://git.kernel.org/stable/c/65ed89cad1f57034c…
https://git.kernel.org/stable/c/d0eb14cb8c08b00c3…
https://git.kernel.org/stable/c/6d845028609a4af0a…
https://git.kernel.org/stable/c/c31e72d021db2714d…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 8459d61fbf24967839a70235165673148c7c7f17 , < 2dcc86fefe09ac853158afd96b60d544af115dc5 (git) Affected: 5071beb59ee416e8ab456ac8647a4dabcda823b1 , < 9a3c1ad93e6fba67b3a637cfa95a57a6685e4908 (git) Affected: 997ae8da14f1639ce6fb66a063dab54031cd61b3 , < 65ed89cad1f57034c256b016e89e8c0a4ec7c65b (git) Affected: 51e34db64f4e43c7b055ccf881b7f3e0c31bb26d , < d0eb14cb8c08b00c36a3d5dc57a6f428b301f721 (git) Affected: e8c526f2bdf1845bedaf6a478816a3d06fa78b8f , < 6d845028609a4af0ad66f499ee0bd5789122b067 (git) Affected: e8c526f2bdf1845bedaf6a478816a3d06fa78b8f , < c31e72d021db2714df03df6c42855a1db592716c (git) Affected: 106e457953315e476b3642ef24be25ed862aaba3 (git) Affected: c964bf65f80a14288d767023a1b300b30f5b9cd0 (git) Affected: 5.15.170 , < 5.15.174 (semver) Affected: 6.1.115 , < 6.1.120 (semver) Affected: 6.6.59 , < 6.6.64 (semver) Affected: 6.11.6 , < 6.11.11 (semver) Affected: 5.4.293 , < 5.5 (semver) Affected: 5.10.237 , < 5.11 (semver)
Linux	Linux	Affected: 6.12 Unaffected: 0 , < 6.12 (semver) Unaffected: 5.15.174 , ≤ 5.15.* (semver) Unaffected: 6.1.120 , ≤ 6.1.* (semver) Unaffected: 6.6.64 , ≤ 6.6.* (semver) Unaffected: 6.11.11 , ≤ 6.11.* (semver) Unaffected: 6.12.2 , ≤ 6.12.* (semver) Unaffected: 6.13 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2024-53206",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-11T15:43:21.588054Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "CWE-416 Use After Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-02-11T15:45:26.365Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T20:47:34.185Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/inet_connection_sock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2dcc86fefe09ac853158afd96b60d544af115dc5",
              "status": "affected",
              "version": "8459d61fbf24967839a70235165673148c7c7f17",
              "versionType": "git"
            },
            {
              "lessThan": "9a3c1ad93e6fba67b3a637cfa95a57a6685e4908",
              "status": "affected",
              "version": "5071beb59ee416e8ab456ac8647a4dabcda823b1",
              "versionType": "git"
            },
            {
              "lessThan": "65ed89cad1f57034c256b016e89e8c0a4ec7c65b",
              "status": "affected",
              "version": "997ae8da14f1639ce6fb66a063dab54031cd61b3",
              "versionType": "git"
            },
            {
              "lessThan": "d0eb14cb8c08b00c36a3d5dc57a6f428b301f721",
              "status": "affected",
              "version": "51e34db64f4e43c7b055ccf881b7f3e0c31bb26d",
              "versionType": "git"
            },
            {
              "lessThan": "6d845028609a4af0ad66f499ee0bd5789122b067",
              "status": "affected",
              "version": "e8c526f2bdf1845bedaf6a478816a3d06fa78b8f",
              "versionType": "git"
            },
            {
              "lessThan": "c31e72d021db2714df03df6c42855a1db592716c",
              "status": "affected",
              "version": "e8c526f2bdf1845bedaf6a478816a3d06fa78b8f",
              "versionType": "git"
            },
            {
              "status": "affected",
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              "versionType": "git"
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              "status": "affected",
              "version": "c964bf65f80a14288d767023a1b300b30f5b9cd0",
              "versionType": "git"
            },
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              "status": "affected",
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              "versionType": "semver"
            },
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              "versionType": "semver"
            },
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              "versionType": "semver"
            },
            {
              "lessThan": "6.11.11",
              "status": "affected",
              "version": "6.11.6",
              "versionType": "semver"
            },
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              "status": "affected",
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            },
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              "status": "affected",
              "version": "5.10.237",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/inet_connection_sock.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.174",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.120",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.64",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.11.*",
              "status": "unaffected",
              "version": "6.11.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.174",
                  "versionStartIncluding": "5.15.170",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.120",
                  "versionStartIncluding": "6.1.115",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.64",
                  "versionStartIncluding": "6.6.59",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.11.11",
                  "versionStartIncluding": "6.11.6",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.2",
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                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13",
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                },
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              "negate": false,
              "operator": "OR"
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntcp: Fix use-after-free of nreq in reqsk_timer_handler().\n\nThe cited commit replaced inet_csk_reqsk_queue_drop_and_put() with\n__inet_csk_reqsk_queue_drop() and reqsk_put() in reqsk_timer_handler().\n\nThen, oreq should be passed to reqsk_put() instead of req; otherwise\nuse-after-free of nreq could happen when reqsk is migrated but the\nretry attempt failed (e.g. due to timeout).\n\nLet\u0027s pass oreq to reqsk_put()."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The vulnerable request sock and its timer are created purely by inbound TCP SYN packets to a listening port, and the failure branch is driven by the remote peer withholding or racing the final ACK. This is core TCP/IP receive-path code reachable by any remote client, including internet-facing servers.\nAC:L - The attacker controls both the object supply (SYN flood populates the SYN queue and the request_sock slab) and the branch selection (never ACK to force `expire`, or send the final ACK concurrently to lose the `own_req` race), giving repeatable success. Listener migration is a routine, recurring event on exactly the SO_REUSEPORT rolling-restart/worker-recycle deployments that enable `tcp_migrate_req`, so a persistent attacker hits it without special effort.\nPR:N - No authentication or credentials of any kind are needed \u2014 the attacker only sends SYNs to an open TCP port and declines to complete the handshake. The entire path executes in the pre-connection SYN-queue/timer context.\nUI:N - The whole sequence runs in softirq timer context off attacker-supplied packets, with no action required from any local user or administrator.\nS:U - The corruption is confined to kernel slab memory and kernel socket structures within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The use-after-free lets the attacker reoccupy the freed `request_sock` slot with objects whose contents they control via crafted SYNs, and the resulting premature free of a live reqsk yields reads of `rsk_ops`, `rsk_listener`, and `saved_syn` from attacker-groomed memory, enabling kernel memory disclosure.\nI:H - `reqsk_put()` on freed memory performs a write (refcount decrement) into the slab, which can corrupt the SLUB free pointer or underflow a live request sock\u0027s refcount, cascading to an indirect call through `req-\u003ersk_ops-\u003edestructor` read from freed memory and a `sock_put()` listener refcount underflow \u2014 a control-flow-hijack-capable primitive.\nA:H - Even without full exploitation, the use-after-free and the resulting premature frees/refcount underflows on hashed request socks and listener sockets reliably produce slab corruption and kernel oops/panic, remotely and repeatably."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:44:35.910Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2dcc86fefe09ac853158afd96b60d544af115dc5"
        },
        {
          "url": "https://git.kernel.org/stable/c/9a3c1ad93e6fba67b3a637cfa95a57a6685e4908"
        },
        {
          "url": "https://git.kernel.org/stable/c/65ed89cad1f57034c256b016e89e8c0a4ec7c65b"
        },
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          "url": "https://git.kernel.org/stable/c/d0eb14cb8c08b00c36a3d5dc57a6f428b301f721"
        },
        {
          "url": "https://git.kernel.org/stable/c/6d845028609a4af0ad66f499ee0bd5789122b067"
        },
        {
          "url": "https://git.kernel.org/stable/c/c31e72d021db2714df03df6c42855a1db592716c"
        }
      ],
      "title": "tcp: Fix use-after-free of nreq in reqsk_timer_handler().",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-53206",
    "datePublished": "2024-12-27T13:49:52.131Z",
    "dateReserved": "2024-11-19T17:17:25.019Z",
    "dateUpdated": "2026-08-05T11:44:35.910Z",
    "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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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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.

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