fkie_cve-2021-47520
Vulnerability from fkie_nvd
Published
2024-05-24 15:15
Modified
2024-11-21 06:36
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: can: pch_can: pch_can_rx_normal: fix use after free After calling netif_receive_skb(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is dereferenced just after the call netif_receive_skb(skb). Reordering the lines solves the issue.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3a3c46e2eff0577454860a203be1a8295f4acb76Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3e193ef4e0a3f5bf92ede83ef214cb09d01b00aaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6c73fc931658d8cbc8a1714b326cb31eb71d16a7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/703dde112021c93d6e89443c070e7dbd4dea612ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/94cddf1e9227a171b27292509d59691819c458dbPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/abb4eff3dcd2e583060082a18a8dbf31f02689d4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/affbad02bf80380a7403885b9fe4a1587d1bb4f3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bafe343a885c70dddf358379cf0b2a1c07355d8dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3a3c46e2eff0577454860a203be1a8295f4acb76Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/3e193ef4e0a3f5bf92ede83ef214cb09d01b00aaPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6c73fc931658d8cbc8a1714b326cb31eb71d16a7Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/703dde112021c93d6e89443c070e7dbd4dea612ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/94cddf1e9227a171b27292509d59691819c458dbPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/abb4eff3dcd2e583060082a18a8dbf31f02689d4Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/affbad02bf80380a7403885b9fe4a1587d1bb4f3Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/bafe343a885c70dddf358379cf0b2a1c07355d8dPatch
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 *


To clipboard 

{
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: pch_can: pch_can_rx_normal: fix use after free\n\nAfter calling netif_receive_skb(skb), dereferencing skb is unsafe.\nEspecially, the can_frame cf which aliases skb memory is dereferenced\njust after the call netif_receive_skb(skb).\n\nReordering the lines solves the issue."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: can: pch_can: pch_can_rx_normal: corregir el use after free despu\u00e9s de llamar a netif_receive_skb(skb), desreferenciar skb no es seguro. Especialmente, el can_frame cf que alias la memoria skb se desreferencia justo despu\u00e9s de la llamada netif_receive_skb(skb). Reordenar las l\u00edneas resuelve el problema."
    }
  ],
  "id": "CVE-2021-47520",
  "lastModified": "2024-11-21T06:36:25.953",
  "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"
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        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
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  "published": "2024-05-24T15:15:14.003",
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  "vulnStatus": "Modified",
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      "source": "nvd@nist.gov",
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}


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