Vulnerability-Lookup

GHSA-3MQR-VVF3-23JJ

Vulnerability from github – Published: 2024-08-26 12:31 – Updated: 2025-11-04 00:31

Details

In the Linux kernel, the following vulnerability has been resolved:

fou: remove warn in gue_gro_receive on unsupported protocol

Drop the WARN_ON_ONCE inn gue_gro_receive if the encapsulated type is not known or does not have a GRO handler.

Such a packet is easily constructed. Syzbot generates them and sets off this warning.

Remove the warning as it is expected and not actionable.

The warning was previously reduced from WARN_ON to WARN_ON_ONCE in commit 270136613bf7 ("fou: Do WARN_ON_ONCE in gue_gro_receive for bad proto callbacks").

Severity

7.8 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2024-44940"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-08-26T12:15:06Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfou: remove warn in gue_gro_receive on unsupported protocol\n\nDrop the WARN_ON_ONCE inn gue_gro_receive if the encapsulated type is\nnot known or does not have a GRO handler.\n\nSuch a packet is easily constructed. Syzbot generates them and sets\noff this warning.\n\nRemove the warning as it is expected and not actionable.\n\nThe warning was previously reduced from WARN_ON to WARN_ON_ONCE in\ncommit 270136613bf7 (\"fou: Do WARN_ON_ONCE in gue_gro_receive for bad\nproto callbacks\").",
  "id": "GHSA-3mqr-vvf3-23jj",
  "modified": "2025-11-04T00:31:19Z",
  "published": "2024-08-26T12:31:20Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-44940"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3db4395332e7050ef9ddeb3052e6b5019f2a2a59"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/440ab7f97261bc28501636a13998e1b1946d2e79"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5a2e37bc648a2503bf6d687aed27b9f4455d82eb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a925a200299a6dfc7c172f54da6f374edc930053"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b1453a5616c7bd8acd90633ceba4e59105ba3b51"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dd89a81d850fa9a65f67b4527c0e420d15bf836c"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-44940 (GCVE-0-2024-44940)

Vulnerability from cvelistv5 – Published: 2024-08-26 11:20 – Updated: 2026-08-05 11:37

Title

fou: remove warn in gue_gro_receive on unsupported protocol

Summary

In the Linux kernel, the following vulnerability has been resolved: fou: remove warn in gue_gro_receive on unsupported protocol Drop the WARN_ON_ONCE inn gue_gro_receive if the encapsulated type is not known or does not have a GRO handler. Such a packet is easily constructed. Syzbot generates them and sets off this warning. Remove the warning as it is expected and not actionable. The warning was previously reduced from WARN_ON to WARN_ON_ONCE in commit 270136613bf7 ("fou: Do WARN_ON_ONCE in gue_gro_receive for bad proto callbacks").

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 15:27 UTC

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/a925a200299a6dfc7…
https://git.kernel.org/stable/c/b1453a5616c7bd8ac…
https://git.kernel.org/stable/c/5a2e37bc648a2503b…
https://git.kernel.org/stable/c/3db4395332e7050ef…
https://git.kernel.org/stable/c/440ab7f97261bc285…
https://git.kernel.org/stable/c/dd89a81d850fa9a65…
https://lists.debian.org/debian-lts-announce/2025…
https://lists.debian.org/debian-lts-announce/2025…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 37dd0247797b168ad1cc7f5dbec825a1ee66535b , < a925a200299a6dfc7c172f54da6f374edc930053 (git) Affected: 37dd0247797b168ad1cc7f5dbec825a1ee66535b , < b1453a5616c7bd8acd90633ceba4e59105ba3b51 (git) Affected: 37dd0247797b168ad1cc7f5dbec825a1ee66535b , < 5a2e37bc648a2503bf6d687aed27b9f4455d82eb (git) Affected: 37dd0247797b168ad1cc7f5dbec825a1ee66535b , < 3db4395332e7050ef9ddeb3052e6b5019f2a2a59 (git) Affected: 37dd0247797b168ad1cc7f5dbec825a1ee66535b , < 440ab7f97261bc28501636a13998e1b1946d2e79 (git) Affected: 37dd0247797b168ad1cc7f5dbec825a1ee66535b , < dd89a81d850fa9a65f67b4527c0e420d15bf836c (git)
Linux	Linux	Affected: 3.18 Unaffected: 0 , < 3.18 (semver) Unaffected: 5.10.234 , ≤ 5.10.* (semver) Unaffected: 5.15.174 , ≤ 5.15.* (semver) Unaffected: 6.1.107 , ≤ 6.1.* (semver) Unaffected: 6.6.47 , ≤ 6.6.* (semver) Unaffected: 6.10.6 , ≤ 6.10.* (semver) Unaffected: 6.11 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-44940",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:27:32.251724Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-12T17:33:06.539Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T22:13:45.636Z",
          "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"
      }
    ],
    "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": "a925a200299a6dfc7c172f54da6f374edc930053",
              "status": "affected",
              "version": "37dd0247797b168ad1cc7f5dbec825a1ee66535b",
              "versionType": "git"
            },
            {
              "lessThan": "b1453a5616c7bd8acd90633ceba4e59105ba3b51",
              "status": "affected",
              "version": "37dd0247797b168ad1cc7f5dbec825a1ee66535b",
              "versionType": "git"
            },
            {
              "lessThan": "5a2e37bc648a2503bf6d687aed27b9f4455d82eb",
              "status": "affected",
              "version": "37dd0247797b168ad1cc7f5dbec825a1ee66535b",
              "versionType": "git"
            },
            {
              "lessThan": "3db4395332e7050ef9ddeb3052e6b5019f2a2a59",
              "status": "affected",
              "version": "37dd0247797b168ad1cc7f5dbec825a1ee66535b",
              "versionType": "git"
            },
            {
              "lessThan": "440ab7f97261bc28501636a13998e1b1946d2e79",
              "status": "affected",
              "version": "37dd0247797b168ad1cc7f5dbec825a1ee66535b",
              "versionType": "git"
            },
            {
              "lessThan": "dd89a81d850fa9a65f67b4527c0e420d15bf836c",
              "status": "affected",
              "version": "37dd0247797b168ad1cc7f5dbec825a1ee66535b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/fou_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.18"
            },
            {
              "lessThan": "3.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.234",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.174",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.107",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.47",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.10.*",
              "status": "unaffected",
              "version": "6.10.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.11",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.234",
                  "versionStartIncluding": "3.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.174",
                  "versionStartIncluding": "3.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.107",
                  "versionStartIncluding": "3.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.47",
                  "versionStartIncluding": "3.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.10.6",
                  "versionStartIncluding": "3.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.11",
                  "versionStartIncluding": "3.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfou: remove warn in gue_gro_receive on unsupported protocol\n\nDrop the WARN_ON_ONCE inn gue_gro_receive if the encapsulated type is\nnot known or does not have a GRO handler.\n\nSuch a packet is easily constructed. Syzbot generates them and sets\noff this warning.\n\nRemove the warning as it is expected and not actionable.\n\nThe warning was previously reduced from WARN_ON to WARN_ON_ONCE in\ncommit 270136613bf7 (\"fou: Do WARN_ON_ONCE in gue_gro_receive for bad\nproto callbacks\")."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The warning is reached from the NAPI GRO receive path (`udp4_gro_receive` \u2192 `gue_gro_receive`) while parsing a UDP datagram arriving from the wire on a host with a FOU/GUE tunnel port, so any remote host that can send a UDP packet to that port triggers it.\nAC:L - The trigger is a single stateless, unsolicited UDP packet whose GUE header carries any `proto_ctype` lacking a registered offload handler; the commit itself notes \"such a packet is easily constructed\" and syzbot generates them, with no race, memory-layout, or timing condition involved.\nPR:N - The GRO path processes the packet before any authentication, authorization, or socket-level filtering \u2014 the FOU receive socket is unconnected, so an unauthenticated off-path attacker needs no credentials on the target.\nUI:N - Processing happens automatically in softirq context when the packet is received; no action by any local user or administrator is required.\nS:U - The warning and any resulting panic occur in the kernel of the receiving host, entirely within the same security authority, with no crossing of a VM, container, or IOMMU boundary.\nC:N - Control flow after the WARN is identical to the fixed code (`goto out`); no memory is read out of bounds and nothing is disclosed to the attacker, who cannot observe the kernel log.\nI:N - The bug involves no memory corruption or state modification \u2014 the packet is dropped from GRO either way, so no attacker-controlled data is written anywhere.\nA:H - The attacker-triggerable WARN_ON_ONCE becomes an immediate kernel panic on systems configured with `panic_on_warn=1` or a `warn_limit`, a common hardening/crash-dump setting in production, cloud, and Android fleets, allowing a single remote packet to take down the host."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:37:09.480Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/a925a200299a6dfc7c172f54da6f374edc930053"
        },
        {
          "url": "https://git.kernel.org/stable/c/b1453a5616c7bd8acd90633ceba4e59105ba3b51"
        },
        {
          "url": "https://git.kernel.org/stable/c/5a2e37bc648a2503bf6d687aed27b9f4455d82eb"
        },
        {
          "url": "https://git.kernel.org/stable/c/3db4395332e7050ef9ddeb3052e6b5019f2a2a59"
        },
        {
          "url": "https://git.kernel.org/stable/c/440ab7f97261bc28501636a13998e1b1946d2e79"
        },
        {
          "url": "https://git.kernel.org/stable/c/dd89a81d850fa9a65f67b4527c0e420d15bf836c"
        }
      ],
      "title": "fou: remove warn in gue_gro_receive on unsupported protocol",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-44940",
    "datePublished": "2024-08-26T11:20:44.914Z",
    "dateReserved": "2024-08-21T05:34:56.664Z",
    "dateUpdated": "2026-08-05T11:37:09.480Z",
    "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.