cve-2022-48897
Vulnerability from cvelistv5
Published
2024-08-21 06:10
Modified
2024-11-04 12:18
Severity ?
Summary
arm64/mm: fix incorrect file_map_count for invalid pmd
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/21e5eca0ac9046da9918a919bc92b7b5a78d27e7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/74c2f81054510d45b813548cb0a1c4ebf87cdd5fPatch
Impacted products
Vendor Product Version
Linux Linux Version: 5.19
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2022-48897",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T16:04:02.667738Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-12T17:33:12.803Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/include/asm/pgtable.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "21e5eca0ac90",
              "status": "affected",
              "version": "42b2547137f5",
              "versionType": "git"
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              "lessThan": "74c2f8105451",
              "status": "affected",
              "version": "42b2547137f5",
              "versionType": "git"
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        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/include/asm/pgtable.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.19"
            },
            {
              "lessThan": "5.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\narm64/mm: fix incorrect file_map_count for invalid pmd\n\nThe page table check trigger BUG_ON() unexpectedly when split hugepage:\n\n ------------[ cut here ]------------\n kernel BUG at mm/page_table_check.c:119!\n Internal error: Oops - BUG: 00000000f2000800 [#1] SMP\n Dumping ftrace buffer:\n    (ftrace buffer empty)\n Modules linked in:\n CPU: 7 PID: 210 Comm: transhuge-stres Not tainted 6.1.0-rc3+ #748\n Hardware name: linux,dummy-virt (DT)\n pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n pc : page_table_check_set.isra.0+0x398/0x468\n lr : page_table_check_set.isra.0+0x1c0/0x468\n[...]\n Call trace:\n  page_table_check_set.isra.0+0x398/0x468\n  __page_table_check_pte_set+0x160/0x1c0\n  __split_huge_pmd_locked+0x900/0x1648\n  __split_huge_pmd+0x28c/0x3b8\n  unmap_page_range+0x428/0x858\n  unmap_single_vma+0xf4/0x1c8\n  zap_page_range+0x2b0/0x410\n  madvise_vma_behavior+0xc44/0xe78\n  do_madvise+0x280/0x698\n  __arm64_sys_madvise+0x90/0xe8\n  invoke_syscall.constprop.0+0xdc/0x1d8\n  do_el0_svc+0xf4/0x3f8\n  el0_svc+0x58/0x120\n  el0t_64_sync_handler+0xb8/0xc0\n  el0t_64_sync+0x19c/0x1a0\n[...]\n\nOn arm64, pmd_leaf() will return true even if the pmd is invalid due to\npmd_present_invalid() check. So in pmdp_invalidate() the file_map_count\nwill not only decrease once but also increase once. Then in set_pte_at(),\nthe file_map_count increase again, and so trigger BUG_ON() unexpectedly.\n\nAdd !pmd_present_invalid() check in pmd_user_accessible_page() to fix the\nproblem."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-11-04T12:18:44.481Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/21e5eca0ac9046da9918a919bc92b7b5a78d27e7"
        },
        {
          "url": "https://git.kernel.org/stable/c/74c2f81054510d45b813548cb0a1c4ebf87cdd5f"
        }
      ],
      "title": "arm64/mm: fix incorrect file_map_count for invalid pmd",
      "x_generator": {
        "engine": "bippy-9e1c9544281a"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-48897",
    "datePublished": "2024-08-21T06:10:29.785Z",
    "dateReserved": "2024-08-21T06:06:23.291Z",
    "dateUpdated": "2024-11-04T12:18:44.481Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-48897\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-08-21T07:15:05.693\",\"lastModified\":\"2024-09-11T16:10:40.843\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\narm64/mm: fix incorrect file_map_count for invalid pmd\\n\\nThe page table check trigger BUG_ON() unexpectedly when split hugepage:\\n\\n ------------[ cut here ]------------\\n kernel BUG at mm/page_table_check.c:119!\\n Internal error: Oops - BUG: 00000000f2000800 [#1] SMP\\n Dumping ftrace buffer:\\n    (ftrace buffer empty)\\n Modules linked in:\\n CPU: 7 PID: 210 Comm: transhuge-stres Not tainted 6.1.0-rc3+ #748\\n Hardware name: linux,dummy-virt (DT)\\n pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)\\n pc : page_table_check_set.isra.0+0x398/0x468\\n lr : page_table_check_set.isra.0+0x1c0/0x468\\n[...]\\n Call trace:\\n  page_table_check_set.isra.0+0x398/0x468\\n  __page_table_check_pte_set+0x160/0x1c0\\n  __split_huge_pmd_locked+0x900/0x1648\\n  __split_huge_pmd+0x28c/0x3b8\\n  unmap_page_range+0x428/0x858\\n  unmap_single_vma+0xf4/0x1c8\\n  zap_page_range+0x2b0/0x410\\n  madvise_vma_behavior+0xc44/0xe78\\n  do_madvise+0x280/0x698\\n  __arm64_sys_madvise+0x90/0xe8\\n  invoke_syscall.constprop.0+0xdc/0x1d8\\n  do_el0_svc+0xf4/0x3f8\\n  el0_svc+0x58/0x120\\n  el0t_64_sync_handler+0xb8/0xc0\\n  el0t_64_sync+0x19c/0x1a0\\n[...]\\n\\nOn arm64, pmd_leaf() will return true even if the pmd is invalid due to\\npmd_present_invalid() check. So in pmdp_invalidate() the file_map_count\\nwill not only decrease once but also increase once. Then in set_pte_at(),\\nthe file_map_count increase again, and so trigger BUG_ON() unexpectedly.\\n\\nAdd !pmd_present_invalid() check in pmd_user_accessible_page() to fix the\\nproblem.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: arm64/mm: corrige file_map_count incorrecto para pmd no v\u00e1lido. La verificaci\u00f3n de la tabla de p\u00e1ginas activa BUG_ON() inesperadamente cuando se divide una p\u00e1gina enorme: ------------[ cortar aqu\u00ed ]------------ \u00a1ERROR del kernel en mm/page_table_check.c:119! Error interno: Ups - ERROR: 00000000f2000800 [#1] SMP Dumping ftrace buffer: (ftrace buffer vac\u00edo) M\u00f3dulos vinculados en: CPU: 7 PID: 210 Comm: transhuge-stres No contaminado 6.1.0-rc3+ #748 Nombre de hardware: linux ,dummy-virt (DT) pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc: page_table_check_set.isra.0+0x398/0x468 lr: page_table_check_set.isra.0+0x1c0/0x468 [...] Rastreo de llamadas: page_table_check_set.isra.0+0x398/0x468 __page_table_check_pte_set+0x160/0x1c0 __split_huge_pmd_locked+0x900/0x1648 __split_huge_pmd+0x28c/0x3b8 unmap_page_range+0x428/0x858 single_vma+0xf4/0x1c8 zap_page_range+0x2b0/0x410 madvise_vma_behavior+0xc44 /0xe78 do_madvise+0x280/0x698 __arm64_sys_madvise+0x90/0xe8 invoke_syscall.constprop.0+0xdc/0x1d8 do_el0_svc+0xf4/0x3f8 el0_svc+0x58/0x120 el0t_64_sync_handler+0x b8/0xc0 el0t_64_sync+0x19c/0x1a0 [...] En arm64, pmd_leaf () devolver\u00e1 verdadero incluso si el pmd no es v\u00e1lido debido a la verificaci\u00f3n pmd_present_invalid(). Entonces, en pmdp_invalidate() file_map_count no solo disminuir\u00e1 una vez sino que tambi\u00e9n aumentar\u00e1 una vez. Luego, en set_pte_at(), file_map_count aumenta nuevamente y, por lo tanto, activa BUG_ON() inesperadamente. Agregue !pmd_present_invalid() check in pmd_user_accessible_page() para solucionar el problema.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.19\",\"versionEndExcluding\":\"6.1.7\",\"matchCriteriaId\":\"A3B4D9E4-9005-47B1-B0C1-FFC9874D6FF6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"FF501633-2F44-4913-A8EE-B021929F49F6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"2BDA597B-CAC1-4DF0-86F0-42E142C654E9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"725C78C9-12CE-406F-ABE8-0813A01D66E8\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/21e5eca0ac9046da9918a919bc92b7b5a78d27e7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/74c2f81054510d45b813548cb0a1c4ebf87cdd5f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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