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 

{
   configurations: [
      {
         nodes: [
            {
               cpeMatch: [
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "0BFBC5B8-3555-4F40-8066-0E6481B4B7F2",
                     versionEndExcluding: "4.4.295",
                     versionStartIncluding: "2.6.37",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "5D107324-F4B9-4146-BACC-391E95D41D67",
                     versionEndExcluding: "4.9.293",
                     versionStartIncluding: "4.5",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "71B2A056-7541-4FF3-859E-C55955DDA2DD",
                     versionEndExcluding: "4.14.258",
                     versionStartIncluding: "4.10",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "CECDDE2F-DEEF-4D3A-85FF-6AEBA16D225B",
                     versionEndExcluding: "4.19.221",
                     versionStartIncluding: "4.15",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "B1DD3148-41FC-42AC-96A5-F63D774A97A3",
                     versionEndExcluding: "5.4.165",
                     versionStartIncluding: "4.20",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "D9668578-08F7-4694-A86F-FCE448387A79",
                     versionEndExcluding: "5.10.85",
                     versionStartIncluding: "5.5",
                     vulnerable: true,
                  },
                  {
                     criteria: "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                     matchCriteriaId: "6664ACE2-F748-4AE5-B98B-58803B0B2C3E",
                     versionEndExcluding: "5.15.8",
                     versionStartIncluding: "5.11",
                     vulnerable: true,
                  },
               ],
               negate: false,
               operator: "OR",
            },
         ],
      },
   ],
   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 después 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 después de la llamada netif_receive_skb(skb). Reordenar las líneas 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",
            },
            exploitabilityScore: 1.8,
            impactScore: 5.9,
            source: "nvd@nist.gov",
            type: "Primary",
         },
      ],
   },
   published: "2024-05-24T15:15:14.003",
   references: [
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
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      },
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      },
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      },
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      },
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      },
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         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      },
      {
         source: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
         tags: [
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         ],
         url: "https://git.kernel.org/stable/c/bafe343a885c70dddf358379cf0b2a1c07355d8d",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/3a3c46e2eff0577454860a203be1a8295f4acb76",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
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         ],
         url: "https://git.kernel.org/stable/c/3e193ef4e0a3f5bf92ede83ef214cb09d01b00aa",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
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         url: "https://git.kernel.org/stable/c/6c73fc931658d8cbc8a1714b326cb31eb71d16a7",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
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         url: "https://git.kernel.org/stable/c/703dde112021c93d6e89443c070e7dbd4dea612e",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/94cddf1e9227a171b27292509d59691819c458db",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/abb4eff3dcd2e583060082a18a8dbf31f02689d4",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
         tags: [
            "Patch",
         ],
         url: "https://git.kernel.org/stable/c/affbad02bf80380a7403885b9fe4a1587d1bb4f3",
      },
      {
         source: "af854a3a-2127-422b-91ae-364da2661108",
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         url: "https://git.kernel.org/stable/c/bafe343a885c70dddf358379cf0b2a1c07355d8d",
      },
   ],
   sourceIdentifier: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
   vulnStatus: "Modified",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-416",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
   ],
}


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