fkie_cve-2021-46998
Vulnerability from fkie_nvd
Published
2024-02-28 09:15
Modified
2024-12-06 14:56
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ethernet:enic: Fix a use after free bug in enic_hard_start_xmit In enic_hard_start_xmit, it calls enic_queue_wq_skb(). Inside enic_queue_wq_skb, if some error happens, the skb will be freed by dev_kfree_skb(skb). But the freed skb is still used in skb_tx_timestamp(skb). My patch makes enic_queue_wq_skb() return error and goto spin_unlock() incase of error. The solution is provided by Govind. See https://lkml.org/lkml/2021/4/30/961.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/25a87b1f566b5eb2af2857a928f0e2310d900976Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/643001b47adc844ae33510c4bb93c236667008a3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6892396ebf04ea2c021d80e10f4075e014cd7cc3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7afdd6aba95c8a526038e7abe283eeac3e4320f1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d90529392aaf498dafa95d212295d64b2cea4e24Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f7f6f07774091a6ddd98500b85386c3c6afb30d3Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/25a87b1f566b5eb2af2857a928f0e2310d900976Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/643001b47adc844ae33510c4bb93c236667008a3Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6892396ebf04ea2c021d80e10f4075e014cd7cc3Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7afdd6aba95c8a526038e7abe283eeac3e4320f1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d90529392aaf498dafa95d212295d64b2cea4e24Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f7f6f07774091a6ddd98500b85386c3c6afb30d3Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "F677F1C8-2451-43EC-9555-E283697C189E",
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              "vulnerable": true
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "5.12.5",
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          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nethernet:enic: Fix a use after free bug in enic_hard_start_xmit\n\nIn enic_hard_start_xmit, it calls enic_queue_wq_skb(). Inside\nenic_queue_wq_skb, if some error happens, the skb will be freed\nby dev_kfree_skb(skb). But the freed skb is still used in\nskb_tx_timestamp(skb).\n\nMy patch makes enic_queue_wq_skb() return error and goto spin_unlock()\nincase of error. The solution is provided by Govind.\nSee https://lkml.org/lkml/2021/4/30/961."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ethernet:enic: corrige un error de use after free en enic_hard_start_xmit. En enic_hard_start_xmit, llama a enic_queue_wq_skb(). Dentro de enic_queue_wq_skb, si ocurre alg\u00fan error, dev_kfree_skb(skb) liberar\u00e1 el skb. Pero el skb liberado todav\u00eda se usa en skb_tx_timestamp(skb). Mi parche hace que enic_queue_wq_skb() devuelva un error y vaya a spin_unlock() en caso de error. La soluci\u00f3n la proporciona Govind. Consulte https://lkml.org/lkml/2021/4/30/961."
    }
  ],
  "id": "CVE-2021-46998",
  "lastModified": "2024-12-06T14:56:48.477",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "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"
      }
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  },
  "published": "2024-02-28T09:15:38.090",
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    },
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      "url": "https://git.kernel.org/stable/c/643001b47adc844ae33510c4bb93c236667008a3"
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    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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