fkie_cve-2021-47236
Vulnerability from fkie_nvd
Published
2024-05-21 15:15
Modified
2025-04-29 19:44
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net: cdc_eem: fix tx fixup skb leak when usbnet transmit a skb, eem fixup it in eem_tx_fixup(), if skb_copy_expand() failed, it return NULL, usbnet_start_xmit() will have no chance to free original skb. fix it by free orginal skb in eem_tx_fixup() first, then check skb clone status, if failed, return NULL to usbnet.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/05b2b9f7d24b5663d9b47427fe1555bdafd3ea02Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/14184ec5c958b589ba934da7363a2877879204dfPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1bcacd6088d61c0ac6a990d87975600a81f3247ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/81de2ed06df8b5451e050fe6a318af3263dbff3fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b4f7a9fc9d094c0c4a66f2ad7c37b1dbe9e78f88Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c3b26fdf1b32f91c7a3bc743384b4a298ab53ad7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f12554b0ff639e74612cc01b3b4a049e098d2d65Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f4e6a7f19c82f39b1803e91c54718f0d7143767dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/05b2b9f7d24b5663d9b47427fe1555bdafd3ea02Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/14184ec5c958b589ba934da7363a2877879204dfPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1bcacd6088d61c0ac6a990d87975600a81f3247ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/81de2ed06df8b5451e050fe6a318af3263dbff3fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b4f7a9fc9d094c0c4a66f2ad7c37b1dbe9e78f88Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c3b26fdf1b32f91c7a3bc743384b4a298ab53ad7Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f12554b0ff639e74612cc01b3b4a049e098d2d65Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f4e6a7f19c82f39b1803e91c54718f0d7143767dPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13
linux linux_kernel 5.13


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
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          "negate": false,
          "operator": "OR"
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      ]
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: cdc_eem: fix tx fixup skb leak\n\nwhen usbnet transmit a skb, eem fixup it in eem_tx_fixup(),\nif skb_copy_expand() failed, it return NULL,\nusbnet_start_xmit() will have no chance to free original skb.\n\nfix it by free orginal skb in eem_tx_fixup() first,\nthen check skb clone status, if failed, return NULL to usbnet."
    },
    {
      "lang": "es",
      "value": " En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: cdc_eem: corrige la fuga de skb de reparaci\u00f3n de tx cuando usbnet transmite un skb, eem lo repara en eem_tx_fixup(), si skb_copy_expand() falla, devuelve NULL, usbnet_start_xmit() No tendr\u00e1  posibilidad de liberar el skb original. solucionelo primero con skb original gratuito en eem_tx_fixup(), luego verifique el estado del clon de skb, si falla, devuelva NULL a usbnet."
    }
  ],
  "id": "CVE-2021-47236",
  "lastModified": "2025-04-29T19:44:19.887",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2024-05-21T15:15:12.857",
  "references": [
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "lang": "en",
          "value": "CWE-401"
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      "source": "nvd@nist.gov",
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}


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