cve-2021-47463
Vulnerability from cvelistv5
Published
2024-05-22 06:23
Modified
2024-12-19 07:42
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mm/secretmem: fix NULL page->mapping dereference in page_is_secretmem() Check for a NULL page->mapping before dereferencing the mapping in page_is_secretmem(), as the page's mapping can be nullified while gup() is running, e.g. by reclaim or truncation. BUG: kernel NULL pointer dereference, address: 0000000000000068 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 6 PID: 4173897 Comm: CPU 3/KVM Tainted: G W RIP: 0010:internal_get_user_pages_fast+0x621/0x9d0 Code: <48> 81 7a 68 80 08 04 bc 0f 85 21 ff ff 8 89 c7 be RSP: 0018:ffffaa90087679b0 EFLAGS: 00010046 RAX: ffffe3f37905b900 RBX: 00007f2dd561e000 RCX: ffffe3f37905b934 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffe3f37905b900 ... CR2: 0000000000000068 CR3: 00000004c5898003 CR4: 00000000001726e0 Call Trace: get_user_pages_fast_only+0x13/0x20 hva_to_pfn+0xa9/0x3e0 try_async_pf+0xa1/0x270 direct_page_fault+0x113/0xad0 kvm_mmu_page_fault+0x69/0x680 vmx_handle_exit+0xe1/0x5d0 kvm_arch_vcpu_ioctl_run+0xd81/0x1c70 kvm_vcpu_ioctl+0x267/0x670 __x64_sys_ioctl+0x83/0xa0 do_syscall_64+0x56/0x80 entry_SYSCALL_64_after_hwframe+0x44/0xae
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/79f9bc5843142b649575f887dccdf1c07ad75c20
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b77ba1e02345bafd703f0d407bdbd88c3be1f767
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/79f9bc5843142b649575f887dccdf1c07ad75c20
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b77ba1e02345bafd703f0d407bdbd88c3be1f767
Impacted products
Vendor Product Version
Linux Linux Version: 5.14
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47463",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-05-22T17:54:35.234529Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:13:47.455Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:39:59.505Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/b77ba1e02345bafd703f0d407bdbd88c3be1f767"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/79f9bc5843142b649575f887dccdf1c07ad75c20"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/linux/secretmem.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b77ba1e02345bafd703f0d407bdbd88c3be1f767",
              "status": "affected",
              "version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49",
              "versionType": "git"
            },
            {
              "lessThan": "79f9bc5843142b649575f887dccdf1c07ad75c20",
              "status": "affected",
              "version": "1507f51255c9ff07d75909a84e7c0d7f3c4b2f49",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/linux/secretmem.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.14"
            },
            {
              "lessThan": "5.14",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.14.*",
              "status": "unaffected",
              "version": "5.14.15",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.15",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm/secretmem: fix NULL page-\u003emapping dereference in page_is_secretmem()\n\nCheck for a NULL page-\u003emapping before dereferencing the mapping in\npage_is_secretmem(), as the page\u0027s mapping can be nullified while gup()\nis running, e.g.  by reclaim or truncation.\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000068\n  #PF: supervisor read access in kernel mode\n  #PF: error_code(0x0000) - not-present page\n  PGD 0 P4D 0\n  Oops: 0000 [#1] PREEMPT SMP NOPTI\n  CPU: 6 PID: 4173897 Comm: CPU 3/KVM Tainted: G        W\n  RIP: 0010:internal_get_user_pages_fast+0x621/0x9d0\n  Code: \u003c48\u003e 81 7a 68 80 08 04 bc 0f 85 21 ff ff 8 89 c7 be\n  RSP: 0018:ffffaa90087679b0 EFLAGS: 00010046\n  RAX: ffffe3f37905b900 RBX: 00007f2dd561e000 RCX: ffffe3f37905b934\n  RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffe3f37905b900\n  ...\n  CR2: 0000000000000068 CR3: 00000004c5898003 CR4: 00000000001726e0\n  Call Trace:\n   get_user_pages_fast_only+0x13/0x20\n   hva_to_pfn+0xa9/0x3e0\n   try_async_pf+0xa1/0x270\n   direct_page_fault+0x113/0xad0\n   kvm_mmu_page_fault+0x69/0x680\n   vmx_handle_exit+0xe1/0x5d0\n   kvm_arch_vcpu_ioctl_run+0xd81/0x1c70\n   kvm_vcpu_ioctl+0x267/0x670\n   __x64_sys_ioctl+0x83/0xa0\n   do_syscall_64+0x56/0x80\n   entry_SYSCALL_64_after_hwframe+0x44/0xae"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-12-19T07:42:53.443Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b77ba1e02345bafd703f0d407bdbd88c3be1f767"
        },
        {
          "url": "https://git.kernel.org/stable/c/79f9bc5843142b649575f887dccdf1c07ad75c20"
        }
      ],
      "title": "mm/secretmem: fix NULL page-\u003emapping dereference in page_is_secretmem()",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47463",
    "datePublished": "2024-05-22T06:23:23.688Z",
    "dateReserved": "2024-05-22T06:20:56.198Z",
    "dateUpdated": "2024-12-19T07:42:53.443Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2021-47463\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-22T07:15:11.193\",\"lastModified\":\"2024-11-21T06:36:12.637\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmm/secretmem: fix NULL page-\u003emapping dereference in page_is_secretmem()\\n\\nCheck for a NULL page-\u003emapping before dereferencing the mapping in\\npage_is_secretmem(), as the page\u0027s mapping can be nullified while gup()\\nis running, e.g.  by reclaim or truncation.\\n\\n  BUG: kernel NULL pointer dereference, address: 0000000000000068\\n  #PF: supervisor read access in kernel mode\\n  #PF: error_code(0x0000) - not-present page\\n  PGD 0 P4D 0\\n  Oops: 0000 [#1] PREEMPT SMP NOPTI\\n  CPU: 6 PID: 4173897 Comm: CPU 3/KVM Tainted: G        W\\n  RIP: 0010:internal_get_user_pages_fast+0x621/0x9d0\\n  Code: \u003c48\u003e 81 7a 68 80 08 04 bc 0f 85 21 ff ff 8 89 c7 be\\n  RSP: 0018:ffffaa90087679b0 EFLAGS: 00010046\\n  RAX: ffffe3f37905b900 RBX: 00007f2dd561e000 RCX: ffffe3f37905b934\\n  RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffe3f37905b900\\n  ...\\n  CR2: 0000000000000068 CR3: 00000004c5898003 CR4: 00000000001726e0\\n  Call Trace:\\n   get_user_pages_fast_only+0x13/0x20\\n   hva_to_pfn+0xa9/0x3e0\\n   try_async_pf+0xa1/0x270\\n   direct_page_fault+0x113/0xad0\\n   kvm_mmu_page_fault+0x69/0x680\\n   vmx_handle_exit+0xe1/0x5d0\\n   kvm_arch_vcpu_ioctl_run+0xd81/0x1c70\\n   kvm_vcpu_ioctl+0x267/0x670\\n   __x64_sys_ioctl+0x83/0xa0\\n   do_syscall_64+0x56/0x80\\n   entry_SYSCALL_64_after_hwframe+0x44/0xae\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm/secretmem: corrige la p\u00e1gina NULL-\u0026gt;desreferencia de mapeo en page_is_secretmem() Verifique si hay una p\u00e1gina NULL-\u0026gt;mapping antes de desreferenciar el mapeo en page_is_secretmem(), ya que el mapeo de la p\u00e1gina puede ser anulado mientras se ejecuta gup(), por ejemplo, mediante recuperaci\u00f3n o truncamiento. ERROR: desreferencia del puntero NULL del kernel, direcci\u00f3n: 00000000000000068 #PF: acceso de lectura del supervisor en modo kernel #PF: c\u00f3digo_error(0x0000) - p\u00e1gina no presente PGD 0 P4D 0 Ups: 0000 [#1] PREEMPT SMP NOPTI CPU: 6 PID: 4173897 Comunicaciones: CPU 3/KVM contaminada: GW RIP: 0010:internal_get_user_pages_fast+0x621/0x9d0 C\u00f3digo: \u0026lt;48\u0026gt; 81 7a 68 80 08 04 bc 0f 85 21 ff ff 8 89 c7 be RSP: ffffaa90087679 b0 EFLAGS: 00010046 RAX: ffffe3f37905b900 RBX: 00007f2dd561e000 RCX: ffffe3f37905b934 RDX: 0000000000000000 RSI: 00000000000000000 RDI: ffffe3f37905b900 ... CR2: 0000068 CR3: 00000004c5898003 CR4: 00000000001726e0 Seguimiento de llamadas: get_user_pages_fast_only+0x13/0x20 hva_to_pfn+0xa9/0x3e0 try_async_pf+0xa1/0x270 direct_page_fault+0x113/ 0xad0 kvm_mmu_page_fault+0x69/0x680 vmx_handle_exit+0xe1/0x5d0 kvm_arch_vcpu_ioctl_run+0xd81/0x1c70 kvm_vcpu_ioctl+0x267/0x670 __x64_sys_ioctl+0x83/0xa0 scall_64+0x56/0x80 entrada_SYSCALL_64_after_hwframe+0x44/0xae\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/79f9bc5843142b649575f887dccdf1c07ad75c20\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b77ba1e02345bafd703f0d407bdbd88c3be1f767\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/79f9bc5843142b649575f887dccdf1c07ad75c20\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://git.kernel.org/stable/c/b77ba1e02345bafd703f0d407bdbd88c3be1f767\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}"
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.