GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2024-46865 (GCVE-0-2024-46865)

Vulnerability from cvelistv5 – Published: 2024-09-27 12:42 – Updated: 2026-08-05 11:39
VLAI
Title
fou: fix initialization of grc
Summary
In the Linux kernel, the following vulnerability has been resolved: fou: fix initialization of grc The grc must be initialize first. There can be a condition where if fou is NULL, goto out will be executed and grc would be used uninitialized.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-29 13:42 UTC
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 231c235d2f7a66f018f172e26ffd47c363f244ef , < 392f6a97fcbecc64f0c00058b2db5bb0e4b8cc3e (git)
Affected: 4494bccb52ffda22ce5a1163a776d970e6229e08 , < 16ff0895283058b0f96d4fe277aa25ee096f0ea8 (git)
Affected: d7567f098f54cb53ee3cee1c82e3d0ed9698b6b3 , < 5d537b8d900514509622ce92330b70d2e581d409 (git)
Affected: 1df42be305fe478ded1ee0c1d775f4ece713483b , < 7ae890ee19479eeeb87724cca8430b5cb3660c74 (git)
Affected: c46cd6aaca81040deaea3500ba75126963294bd9 , < aca06c617c83295f0caa486ad608fbef7bdc11e8 (git)
Affected: 7e4196935069947d8b70b09c1660b67b067e75cb , < 4c8002277167125078e6b9b90137bdf443ebaa08 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.10.226 , < 5.10.227 (semver)
Affected: 5.15.167 , < 5.15.168 (semver)
Affected: 6.1.110 , < 6.1.111 (semver)
Affected: 6.6.51 , < 6.6.52 (semver)
Affected: 6.10.10 , < 6.10.11 (semver)
guessed Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
guessed Create a notification for this product.
Show details on NVD website

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-46865",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-29T13:42:07.132296Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-29T13:43:27.114Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T22:19:47.627Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "affected": [
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-12T11:58:02.422Z",
          "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
          "shortName": "siemens-SADP"
        },
        "references": [
          {
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
          }
        ],
        "x_adpType": "supplier"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/fou_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "392f6a97fcbecc64f0c00058b2db5bb0e4b8cc3e",
              "status": "affected",
              "version": "231c235d2f7a66f018f172e26ffd47c363f244ef",
              "versionType": "git"
            },
            {
              "lessThan": "16ff0895283058b0f96d4fe277aa25ee096f0ea8",
              "status": "affected",
              "version": "4494bccb52ffda22ce5a1163a776d970e6229e08",
              "versionType": "git"
            },
            {
              "lessThan": "5d537b8d900514509622ce92330b70d2e581d409",
              "status": "affected",
              "version": "d7567f098f54cb53ee3cee1c82e3d0ed9698b6b3",
              "versionType": "git"
            },
            {
              "lessThan": "7ae890ee19479eeeb87724cca8430b5cb3660c74",
              "status": "affected",
              "version": "1df42be305fe478ded1ee0c1d775f4ece713483b",
              "versionType": "git"
            },
            {
              "lessThan": "aca06c617c83295f0caa486ad608fbef7bdc11e8",
              "status": "affected",
              "version": "c46cd6aaca81040deaea3500ba75126963294bd9",
              "versionType": "git"
            },
            {
              "lessThan": "4c8002277167125078e6b9b90137bdf443ebaa08",
              "status": "affected",
              "version": "7e4196935069947d8b70b09c1660b67b067e75cb",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/fou_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5.10.227",
              "status": "affected",
              "version": "5.10.226",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.168",
              "status": "affected",
              "version": "5.15.167",
              "versionType": "semver"
            },
            {
              "lessThan": "6.1.111",
              "status": "affected",
              "version": "6.1.110",
              "versionType": "semver"
            },
            {
              "lessThan": "6.6.52",
              "status": "affected",
              "version": "6.6.51",
              "versionType": "semver"
            },
            {
              "lessThan": "6.10.11",
              "status": "affected",
              "version": "6.10.10",
              "versionType": "semver"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.227",
                  "versionStartIncluding": "5.10.226",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.168",
                  "versionStartIncluding": "5.15.167",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.111",
                  "versionStartIncluding": "6.1.110",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.52",
                  "versionStartIncluding": "6.6.51",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.10.11",
                  "versionStartIncluding": "6.10.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfou: fix initialization of grc\n\nThe grc must be initialize first. There can be a condition where if\nfou is NULL, goto out will be executed and grc would be used\nuninitialized."
        }
      ],
      "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 code is the GUE/FOU GRO receive handler, reached purely from an inbound UDP datagram addressed to the configured FOU port via napi_gro_receive \u2192 inet_gro_receive \u2192 udp4_gro_receive \u2192 gue_gro_receive. A remote attacker anywhere on the network can drive this path with crafted packets.\nAC:L - The attacker can flood the FOU port continuously so a packet is always in flight, and FOU/netns teardown (the window where sk_user_data is NULL) is routine, frequent churn on container and cloud hosts that use FOU-encapsulated tunnels. The attacker also controls the value in the uninitialized stack slot by first sending a GUE packet with GUE_PFLAG_REMCSUM, which stores attacker-derived offset/delta into that exact frame slot in the same function.\nPR:N - There is no authentication, credential check, or capability test anywhere between packet reception and gue_gro_receive; the FOU socket accepts unsolicited datagrams. No local account or privilege of any kind is required.\nUI:N - Exploitation occurs entirely in softirq context on packet receipt with no victim action required.\nS:U - The uninitialized-value use and the resulting write both occur within the kernel\u0027s own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The bug reads uninitialized kernel stack memory and folds it into a 16-bit value written into an in-flight network buffer, and the same defect provides an out-of-bounds write primitive at a partially attacker-influenced offset, which under kernel scoring practice is treated as leverageable for arbitrary memory disclosure.\nI:H - remcsum_unadjust() performs a 2-byte write through a pointer computed from the uninitialized (and attacker-groomable) grc-\u003eoffset; when the size_t arithmetic wraps the write lands far outside any legitimate buffer, giving an out-of-bounds write into kernel memory that can be leveraged for control-flow-relevant corruption.\nA:H - The wild-pointer 2-byte write at frag0 + ~4GiB faults on unmapped kernel memory and oopses in softirq context, and the surrounding corruption of GRO/checksum state destabilises the receive path \u2014 a remote unauthenticated kernel crash."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:39:07.502Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/392f6a97fcbecc64f0c00058b2db5bb0e4b8cc3e"
        },
        {
          "url": "https://git.kernel.org/stable/c/16ff0895283058b0f96d4fe277aa25ee096f0ea8"
        },
        {
          "url": "https://git.kernel.org/stable/c/5d537b8d900514509622ce92330b70d2e581d409"
        },
        {
          "url": "https://git.kernel.org/stable/c/7ae890ee19479eeeb87724cca8430b5cb3660c74"
        },
        {
          "url": "https://git.kernel.org/stable/c/aca06c617c83295f0caa486ad608fbef7bdc11e8"
        },
        {
          "url": "https://git.kernel.org/stable/c/4c8002277167125078e6b9b90137bdf443ebaa08"
        }
      ],
      "title": "fou: fix initialization of grc",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-46865",
    "datePublished": "2024-09-27T12:42:53.691Z",
    "dateReserved": "2024-09-11T15:12:18.294Z",
    "dateUpdated": "2026-08-05T11:39:07.502Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2024-46865",
      "date": "2026-09-18",
      "epss": "0.00551",
      "percentile": "0.44883"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "net/ipv4/fou_core.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "392f6a97fcbecc64f0c00058b2db5bb0e4b8cc3e",
                    "status": "affected",
                    "version": "231c235d2f7a66f018f172e26ffd47c363f244ef",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "16ff0895283058b0f96d4fe277aa25ee096f0ea8",
                    "status": "affected",
                    "version": "4494bccb52ffda22ce5a1163a776d970e6229e08",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "5d537b8d900514509622ce92330b70d2e581d409",
                    "status": "affected",
                    "version": "d7567f098f54cb53ee3cee1c82e3d0ed9698b6b3",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "7ae890ee19479eeeb87724cca8430b5cb3660c74",
                    "status": "affected",
                    "version": "1df42be305fe478ded1ee0c1d775f4ece713483b",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "aca06c617c83295f0caa486ad608fbef7bdc11e8",
                    "status": "affected",
                    "version": "c46cd6aaca81040deaea3500ba75126963294bd9",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "4c8002277167125078e6b9b90137bdf443ebaa08",
                    "status": "affected",
                    "version": "7e4196935069947d8b70b09c1660b67b067e75cb",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "net/ipv4/fou_core.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "5.10.227",
                    "status": "affected",
                    "version": "5.10.226",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "5.15.168",
                    "status": "affected",
                    "version": "5.15.167",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "6.1.111",
                    "status": "affected",
                    "version": "6.1.110",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "6.6.52",
                    "status": "affected",
                    "version": "6.6.51",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "6.10.11",
                    "status": "affected",
                    "version": "6.10.10",
                    "versionType": "semver"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          },
          {
            "affectedData": [
              {
                "defaultStatus": "unknown",
                "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
                "vendor": "Siemens",
                "versions": [
                  {
                    "lessThan": "*",
                    "status": "affected",
                    "version": "0",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.10.226:*:*:*:*:*:*:*",
                    "matchCriteriaId": "6FF3CC29-3CB0-439D-B47A-358D57871F06",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.15.167:*:*:*:*:*:*:*",
                    "matchCriteriaId": "B69DB824-7793-4911-A284-B06E7EFEDD7A",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.1.110:*:*:*:*:*:*:*",
                    "matchCriteriaId": "BE9D244D-F8E0-4625-8EE0-5F654BC926C1",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.6.51:*:*:*:*:*:*:*",
                    "matchCriteriaId": "C599A8CC-8612-442F-9C8A-A2AC38388756",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.10.10:*:*:*:*:*:*:*",
                    "matchCriteriaId": "7BDB319B-4374-489F-AF7A-CB5F0B71A038",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfou: fix initialization of grc\n\nThe grc must be initialize first. There can be a condition where if\nfou is NULL, goto out will be executed and grc would be used\nuninitialized."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: fou: se corrige la inicializaci\u00f3n de grc. Primero se debe inicializar grc. Puede haber una condici\u00f3n en la que si fou es NULL, se ejecutar\u00e1 goto out y se utilizar\u00e1 grc sin inicializar."
          }
        ],
        "id": "CVE-2024-46865",
        "lastModified": "2026-08-04T11:20:35.250",
        "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": 7.1,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.2,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2024-46865",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-29T13:42:07.132296Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2024-09-27T13:15:17.820",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/16ff0895283058b0f96d4fe277aa25ee096f0ea8"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/392f6a97fcbecc64f0c00058b2db5bb0e4b8cc3e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/4c8002277167125078e6b9b90137bdf443ebaa08"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/5d537b8d900514509622ce92330b70d2e581d409"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/7ae890ee19479eeeb87724cca8430b5cb3660c74"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/aca06c617c83295f0caa486ad608fbef7bdc11e8"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
          },
          {
            "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-908"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-04T22:41:52+00:00",
      "cve": "CVE-2024-46865",
      "id": "CVE-2024-46865",
      "initial_release_date": "2024-09-27T00:00:00+00:00",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: fou: fix initialization of grc",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-46865.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "providerMetadata": {
              "dateUpdated": "2025-11-03T22:19:47.627Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
            },
            "references": [
              {
                "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
              },
              {
                "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
              }
            ],
            "title": "CVE Program Container"
          },
          {
            "affected": [
              {
                "defaultStatus": "unknown",
                "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
                "vendor": "Siemens",
                "versions": [
                  {
                    "lessThan": "*",
                    "status": "affected",
                    "version": "0",
                    "versionType": "custom"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-05-12T11:58:02.422Z",
              "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
              "shortName": "siemens-SADP"
            },
            "references": [
              {
                "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
              }
            ],
            "x_adpType": "supplier"
          },
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2024-46865",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-09-29T13:42:07.132296Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2024-09-29T13:43:23.951Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "net/ipv4/fou_core.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "392f6a97fcbecc64f0c00058b2db5bb0e4b8cc3e",
                  "status": "affected",
                  "version": "231c235d2f7a66f018f172e26ffd47c363f244ef",
                  "versionType": "git"
                },
                {
                  "lessThan": "16ff0895283058b0f96d4fe277aa25ee096f0ea8",
                  "status": "affected",
                  "version": "4494bccb52ffda22ce5a1163a776d970e6229e08",
                  "versionType": "git"
                },
                {
                  "lessThan": "5d537b8d900514509622ce92330b70d2e581d409",
                  "status": "affected",
                  "version": "d7567f098f54cb53ee3cee1c82e3d0ed9698b6b3",
                  "versionType": "git"
                },
                {
                  "lessThan": "7ae890ee19479eeeb87724cca8430b5cb3660c74",
                  "status": "affected",
                  "version": "1df42be305fe478ded1ee0c1d775f4ece713483b",
                  "versionType": "git"
                },
                {
                  "lessThan": "aca06c617c83295f0caa486ad608fbef7bdc11e8",
                  "status": "affected",
                  "version": "c46cd6aaca81040deaea3500ba75126963294bd9",
                  "versionType": "git"
                },
                {
                  "lessThan": "4c8002277167125078e6b9b90137bdf443ebaa08",
                  "status": "affected",
                  "version": "7e4196935069947d8b70b09c1660b67b067e75cb",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "net/ipv4/fou_core.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "5.10.227",
                  "status": "affected",
                  "version": "5.10.226",
                  "versionType": "semver"
                },
                {
                  "lessThan": "5.15.168",
                  "status": "affected",
                  "version": "5.15.167",
                  "versionType": "semver"
                },
                {
                  "lessThan": "6.1.111",
                  "status": "affected",
                  "version": "6.1.110",
                  "versionType": "semver"
                },
                {
                  "lessThan": "6.6.52",
                  "status": "affected",
                  "version": "6.6.51",
                  "versionType": "semver"
                },
                {
                  "lessThan": "6.10.11",
                  "status": "affected",
                  "version": "6.10.10",
                  "versionType": "semver"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.227",
                      "versionStartIncluding": "5.10.226",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.168",
                      "versionStartIncluding": "5.15.167",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.111",
                      "versionStartIncluding": "6.1.110",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.52",
                      "versionStartIncluding": "6.6.51",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.10.11",
                      "versionStartIncluding": "6.10.10",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfou: fix initialization of grc\n\nThe grc must be initialize first. There can be a condition where if\nfou is NULL, goto out will be executed and grc would be used\nuninitialized."
            }
          ],
          "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 code is the GUE/FOU GRO receive handler, reached purely from an inbound UDP datagram addressed to the configured FOU port via napi_gro_receive \u2192 inet_gro_receive \u2192 udp4_gro_receive \u2192 gue_gro_receive. A remote attacker anywhere on the network can drive this path with crafted packets.\nAC:L - The attacker can flood the FOU port continuously so a packet is always in flight, and FOU/netns teardown (the window where sk_user_data is NULL) is routine, frequent churn on container and cloud hosts that use FOU-encapsulated tunnels. The attacker also controls the value in the uninitialized stack slot by first sending a GUE packet with GUE_PFLAG_REMCSUM, which stores attacker-derived offset/delta into that exact frame slot in the same function.\nPR:N - There is no authentication, credential check, or capability test anywhere between packet reception and gue_gro_receive; the FOU socket accepts unsolicited datagrams. No local account or privilege of any kind is required.\nUI:N - Exploitation occurs entirely in softirq context on packet receipt with no victim action required.\nS:U - The uninitialized-value use and the resulting write both occur within the kernel\u0027s own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The bug reads uninitialized kernel stack memory and folds it into a 16-bit value written into an in-flight network buffer, and the same defect provides an out-of-bounds write primitive at a partially attacker-influenced offset, which under kernel scoring practice is treated as leverageable for arbitrary memory disclosure.\nI:H - remcsum_unadjust() performs a 2-byte write through a pointer computed from the uninitialized (and attacker-groomable) grc-\u003eoffset; when the size_t arithmetic wraps the write lands far outside any legitimate buffer, giving an out-of-bounds write into kernel memory that can be leveraged for control-flow-relevant corruption.\nA:H - The wild-pointer 2-byte write at frag0 + ~4GiB faults on unmapped kernel memory and oopses in softirq context, and the surrounding corruption of GRO/checksum state destabilises the receive path \u2014 a remote unauthenticated kernel crash."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T11:39:07.502Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/392f6a97fcbecc64f0c00058b2db5bb0e4b8cc3e"
            },
            {
              "url": "https://git.kernel.org/stable/c/16ff0895283058b0f96d4fe277aa25ee096f0ea8"
            },
            {
              "url": "https://git.kernel.org/stable/c/5d537b8d900514509622ce92330b70d2e581d409"
            },
            {
              "url": "https://git.kernel.org/stable/c/7ae890ee19479eeeb87724cca8430b5cb3660c74"
            },
            {
              "url": "https://git.kernel.org/stable/c/aca06c617c83295f0caa486ad608fbef7bdc11e8"
            },
            {
              "url": "https://git.kernel.org/stable/c/4c8002277167125078e6b9b90137bdf443ebaa08"
            }
          ],
          "title": "fou: fix initialization of grc",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-46865",
        "datePublished": "2024-09-27T12:42:53.691Z",
        "dateReserved": "2024-09-11T15:12:18.294Z",
        "dateUpdated": "2026-08-05T11:39:07.502Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.


Loading…

Loading…

Loading…

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.

Loading…

Detection rules are retrieved from Rulezet.

Loading…

Loading…

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.


Loading…