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CVE-2024-43873 (GCVE-0-2024-43873)

Vulnerability from cvelistv5 – Published: 2024-08-21 00:06 – Updated: 2026-05-11 20:31
VLAI
Title
vhost/vsock: always initialize seqpacket_allow
Summary
In the Linux kernel, the following vulnerability has been resolved: vhost/vsock: always initialize seqpacket_allow There are two issues around seqpacket_allow: 1. seqpacket_allow is not initialized when socket is created. Thus if features are never set, it will be read uninitialized. 2. if VIRTIO_VSOCK_F_SEQPACKET is set and then cleared, then seqpacket_allow will not be cleared appropriately (existing apps I know about don't usually do this but it's legal and there's no way to be sure no one relies on this). To fix: - initialize seqpacket_allow after allocation - set it unconditionally in set_features
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:06 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ced7b713711fdd8f99d8d04dc53451441d194c60 , < ea558f10fb05a6503c6e655a1b7d81fdf8e5924c (git)
Affected: ced7b713711fdd8f99d8d04dc53451441d194c60 , < 3062cb100787a9ddf45de30004b962035cd497fb (git)
Affected: ced7b713711fdd8f99d8d04dc53451441d194c60 , < 30bd4593669443ac58515e23557dc8cef70d8582 (git)
Affected: ced7b713711fdd8f99d8d04dc53451441d194c60 , < eab96e8716cbfc2834b54f71cc9501ad4eec963b (git)
Affected: ced7b713711fdd8f99d8d04dc53451441d194c60 , < 1e1fdcbdde3b7663e5d8faeb2245b9b151417d22 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.14
Unaffected: 0 , < 5.14 (semver)
Unaffected: 5.15.165 , ≤ 5.15.* (semver)
Unaffected: 6.1.103 , ≤ 6.1.* (semver)
Unaffected: 6.6.44 , ≤ 6.6.* (semver)
Unaffected: 6.10.3 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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                "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"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2024-43873",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T16:06:13.431243Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2024-08-21T01:15:11.790",
        "references": [
          {
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            "tags": [
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            "url": "https://git.kernel.org/stable/c/1e1fdcbdde3b7663e5d8faeb2245b9b151417d22"
          },
          {
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            "tags": [
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            "url": "https://git.kernel.org/stable/c/3062cb100787a9ddf45de30004b962035cd497fb"
          },
          {
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            "tags": [
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            "url": "https://git.kernel.org/stable/c/30bd4593669443ac58515e23557dc8cef70d8582"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/ea558f10fb05a6503c6e655a1b7d81fdf8e5924c"
          },
          {
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            "tags": [
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            ],
            "url": "https://git.kernel.org/stable/c/eab96e8716cbfc2834b54f71cc9501ad4eec963b"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"
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        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
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              {
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                "value": "CWE-909"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
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    },
    "redhat_vex": {
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      "current_release_date": "2026-06-28T08:06:00+00:00",
      "cve": "CVE-2024-43873",
      "id": "CVE-2024-43873",
      "initial_release_date": "2024-08-21T00:00:00+00:00",
      "product_status:fixed": "305",
      "product_status:known_affected": "50",
      "product_status:known_not_affected": "62",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: vhost/vsock: always initialize seqpacket_allow",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-43873.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-19T02:23:28Z",
      "cve": "CVE-2024-43873",
      "id": "CVE-2024-43873",
      "initial_release_date": "2024-08-22T02:58:30Z",
      "product_status:known_affected": "407",
      "product_status:known_not_affected": "219",
      "product_status:recommended": "686",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-43873",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-43873.json",
      "version": "70"
    },
    "vulnrichment": {
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            "providerMetadata": {
              "dateUpdated": "2025-11-03T22:06:23.270Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
            },
            "references": [
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              }
            ],
            "title": "CVE Program Container"
          },
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2024-43873",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
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                      }
                    ],
                    "role": "CISA Coordinator",
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                    "version": "2.0.3"
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              "dateUpdated": "2024-09-11T12:42:22.662Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
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              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
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              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
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                  "versionType": "git"
                },
                {
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                  "status": "affected",
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                  "versionType": "git"
                },
                {
                  "lessThan": "30bd4593669443ac58515e23557dc8cef70d8582",
                  "status": "affected",
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                },
                {
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                  "status": "affected",
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                  "versionType": "git"
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                {
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            },
            {
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              "product": "Linux",
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              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
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                {
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                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
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                  "status": "unaffected",
                  "version": "5.15.165",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.103",
                  "versionType": "semver"
                },
                {
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                  "version": "6.6.44",
                  "versionType": "semver"
                },
                {
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                  "version": "6.10.3",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
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                  "versionType": "original_commit_for_fix"
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              ]
            }
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          "cpeApplicability": [
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                      "vulnerable": true
                    },
                    {
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                      "vulnerable": true
                    },
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              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvhost/vsock: always initialize seqpacket_allow\n\nThere are two issues around seqpacket_allow:\n1. seqpacket_allow is not initialized when socket is\n   created. Thus if features are never set, it will be\n   read uninitialized.\n2. if VIRTIO_VSOCK_F_SEQPACKET is set and then cleared,\n   then seqpacket_allow will not be cleared appropriately\n   (existing apps I know about don\u0027t usually do this but\n    it\u0027s legal and there\u0027s no way to be sure no one relies\n    on this).\n\nTo fix:\n\t- initialize seqpacket_allow after allocation\n\t- set it unconditionally in set_features"
            }
          ],
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            "dateUpdated": "2026-05-11T20:31:28.675Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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          "references": [
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              "url": "https://git.kernel.org/stable/c/ea558f10fb05a6503c6e655a1b7d81fdf8e5924c"
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              "url": "https://git.kernel.org/stable/c/3062cb100787a9ddf45de30004b962035cd497fb"
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            {
              "url": "https://git.kernel.org/stable/c/1e1fdcbdde3b7663e5d8faeb2245b9b151417d22"
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          ],
          "title": "vhost/vsock: always initialize seqpacket_allow",
          "x_generator": {
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          }
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      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-43873",
        "datePublished": "2024-08-21T00:06:25.114Z",
        "dateReserved": "2024-08-17T09:11:59.281Z",
        "dateUpdated": "2026-05-11T20:31:28.675Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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

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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.


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.