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CVE-2024-41091 (GCVE-0-2024-41091)

Vulnerability from cvelistv5 – Published: 2024-07-29 06:18 – Updated: 2026-08-05 11:35
VLAI
Title
tun: add missing verification for short frame
Summary
In the Linux kernel, the following vulnerability has been resolved: tun: add missing verification for short frame The cited commit missed to check against the validity of the frame length in the tun_xdp_one() path, which could cause a corrupted skb to be sent downstack. Even before the skb is transmitted, the tun_xdp_one-->eth_type_trans() may access the Ethernet header although it can be less than ETH_HLEN. Once transmitted, this could either cause out-of-bound access beyond the actual length, or confuse the underlayer with incorrect or inconsistent header length in the skb metadata. In the alternative path, tun_get_user() already prohibits short frame which has the length less than Ethernet header size from being transmitted for IFF_TAP. This is to drop any frame shorter than the Ethernet header size just like how tun_get_user() does. CVE: CVE-2024-41091
Severity
8.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:24 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 043d222f93ab8c76b56a3b315cd8692e35affb6c , < 32b0aaba5dbc85816898167d9b5d45a22eae82e9 (git)
Affected: 043d222f93ab8c76b56a3b315cd8692e35affb6c , < 6100e0237204890269e3f934acfc50d35fd6f319 (git)
Affected: 043d222f93ab8c76b56a3b315cd8692e35affb6c , < 589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2 (git)
Affected: 043d222f93ab8c76b56a3b315cd8692e35affb6c , < ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146 (git)
Affected: 043d222f93ab8c76b56a3b315cd8692e35affb6c , < d5ad89b7d01ed4e66fd04734fc63d6e78536692a (git)
Affected: 043d222f93ab8c76b56a3b315cd8692e35affb6c , < a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb (git)
Affected: 043d222f93ab8c76b56a3b315cd8692e35affb6c , < 8418f55302fa1d2eeb73e16e345167e545c598a5 (git)
Affected: 043d222f93ab8c76b56a3b315cd8692e35affb6c , < 049584807f1d797fc3078b68035450a9769eb5c3 (git)
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Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.4.281 , ≤ 5.4.* (semver)
Unaffected: 5.10.223 , ≤ 5.10.* (semver)
Unaffected: 5.15.164 , ≤ 5.15.* (semver)
Unaffected: 6.1.102 , ≤ 6.1.* (semver)
Unaffected: 6.6.43 , ≤ 6.6.* (semver)
Unaffected: 6.9.12 , ≤ 6.9.* (semver)
Unaffected: 6.10.2 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Awaiting Analysis"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-41091\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-07-29T07:15:07.553\",\"lastModified\":\"2026-08-04T11:19:28.810\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntun: add missing verification for short frame\\n\\nThe cited commit missed to check against the validity of the frame length\\nin the tun_xdp_one() path, which could cause a corrupted skb to be sent\\ndownstack. Even before the skb is transmitted, the\\ntun_xdp_one--\u003eeth_type_trans() may access the Ethernet header although it\\ncan be less than ETH_HLEN. Once transmitted, this could either cause\\nout-of-bound access beyond the actual length, or confuse the underlayer\\nwith incorrect or inconsistent header length in the skb metadata.\\n\\nIn the alternative path, tun_get_user() already prohibits short frame which\\nhas the length less than Ethernet header size from being transmitted for\\nIFF_TAP.\\n\\nThis is to drop any frame shorter than the Ethernet header size just like\\nhow tun_get_user() does.\\n\\nCVE: CVE-2024-41091\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: tun: agrega verificaci\u00f3n faltante para marcos cortos La confirmaci\u00f3n citada no pudo verificar la validez de la longitud del marco en la ruta tun_xdp_one(), lo que podr\u00eda provocar que un skb da\u00f1ado se env\u00ede hacia abajo. Incluso antes de que se transmita el skb, tun_xdp_one--\u0026gt;eth_type_trans() puede acceder al encabezado de Ethernet aunque puede ser menor que ETH_HLEN. Una vez transmitido, esto podr\u00eda provocar un acceso fuera de los l\u00edmites m\u00e1s all\u00e1 de la longitud real o confundir la capa subyacente con una longitud de encabezado incorrecta o inconsistente en los metadatos de skb. En la ruta alternativa, tun_get_user() ya proh\u00edbe la transmisi\u00f3n de tramas cortas que tengan una longitud menor que el tama\u00f1o del encabezado Ethernet para IFF_TAP. Esto es para eliminar cualquier trama m\u00e1s corta que el tama\u00f1o del encabezado de Ethernet tal como lo hace tun_get_user(). CVE: 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    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-04T11:47:31+00:00",
      "cve": "CVE-2024-41091",
      "id": "CVE-2024-41091",
      "initial_release_date": "2024-07-24T17:00:00+00:00",
      "product_status:fixed": "1336",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "55",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: virtio-net: tun: mlx5_core short frame denial of service",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-41091.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-01T14:01:24Z",
      "cve": "CVE-2024-41091",
      "id": "CVE-2024-41091",
      "initial_release_date": "2024-07-26T03:11:20Z",
      "product_status:known_affected": "432",
      "product_status:known_not_affected": "74",
      "product_status:recommended": "770",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-41091",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-41091.json",
      "version": "94"
    },
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\"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.164\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.102\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.43\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9.12\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/tun.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/32b0aaba5dbc85816898167d9b5d45a22eae82e9\"}, {\"url\": \"https://git.kernel.org/stable/c/6100e0237204890269e3f934acfc50d35fd6f319\"}, {\"url\": \"https://git.kernel.org/stable/c/589382f50b4a5d90d16d8bc9dcbc0e927a3e39b2\"}, {\"url\": \"https://git.kernel.org/stable/c/ad6b3f622ccfb4bfedfa53b6ebd91c3d1d04f146\"}, {\"url\": \"https://git.kernel.org/stable/c/d5ad89b7d01ed4e66fd04734fc63d6e78536692a\"}, {\"url\": \"https://git.kernel.org/stable/c/a9d1c27e2ee3b0ea5d40c105d6e728fc114470bb\"}, {\"url\": \"https://git.kernel.org/stable/c/8418f55302fa1d2eeb73e16e345167e545c598a5\"}, {\"url\": \"https://git.kernel.org/stable/c/049584807f1d797fc3078b68035450a9769eb5c3\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ntun: add missing verification for short frame\\n\\nThe cited commit missed to check against the validity of the frame length\\nin the tun_xdp_one() path, which could cause a corrupted skb to be sent\\ndownstack. Even before the skb is transmitted, the\\ntun_xdp_one--\u003eeth_type_trans() may access the Ethernet header although it\\ncan be less than ETH_HLEN. Once transmitted, this could either cause\\nout-of-bound access beyond the actual length, or confuse the underlayer\\nwith incorrect or inconsistent header length in the skb metadata.\\n\\nIn the alternative path, tun_get_user() already prohibits short frame which\\nhas the length less than Ethernet header size from being transmitted for\\nIFF_TAP.\\n\\nThis is to drop any frame shorter than the Ethernet header size just like\\nhow tun_get_user() does.\\n\\nCVE: CVE-2024-41091\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.281\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.223\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.164\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.102\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.43\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.12\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10.2\", \"versionStartIncluding\": \"4.20\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11\", \"versionStartIncluding\": \"4.20\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:21:53.092Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-41091\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T09:21:53.092Z\", \"dateReserved\": \"2024-07-12T12:17:45.636Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-29T06:18:12.019Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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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

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.


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.