cve-2024-26983
Vulnerability from cvelistv5
Published
2024-05-01 05:27
Modified
2024-09-11 17:33
Severity
Summary
bootconfig: use memblock_free_late to free xbc memory to buddy
References
SourceURLTags
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1e7feb31a18c197d63a5e606025ed63c762f8918
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5a7dfb8fcd3f29fc93161100179b27f24f3d5f35
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/89f9a1e876b5a7ad884918c03a46831af202c8a0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e46d3be714ad9652480c6db129ab8125e2d20ab7
Impacted products
VendorProduct
LinuxLinux
LinuxLinux
Show details on NVD website

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T00:21:05.888Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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        "references": [
          {
            "tags": [
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            "url": "https://git.kernel.org/stable/c/1e7feb31a18c197d63a5e606025ed63c762f8918"
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          {
            "tags": [
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            "url": "https://git.kernel.org/stable/c/e46d3be714ad9652480c6db129ab8125e2d20ab7"
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            "url": "https://git.kernel.org/stable/c/5a7dfb8fcd3f29fc93161100179b27f24f3d5f35"
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            "url": "https://git.kernel.org/stable/c/89f9a1e876b5a7ad884918c03a46831af202c8a0"
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        "title": "CVE Program Container"
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      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-26983",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:45:03.466509Z",
                "version": "2.0.3"
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              "type": "ssvc"
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        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:33:42.750Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/linux/bootconfig.h",
            "lib/bootconfig.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1e7feb31a18c",
              "status": "affected",
              "version": "40caa127f3c7",
              "versionType": "git"
            },
            {
              "lessThan": "e46d3be714ad",
              "status": "affected",
              "version": "40caa127f3c7",
              "versionType": "git"
            },
            {
              "lessThan": "5a7dfb8fcd3f",
              "status": "affected",
              "version": "40caa127f3c7",
              "versionType": "git"
            },
            {
              "lessThan": "89f9a1e876b5",
              "status": "affected",
              "version": "40caa127f3c7",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/linux/bootconfig.h",
            "lib/bootconfig.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.88",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.29",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.8",
              "versionType": "custom"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbootconfig: use memblock_free_late to free xbc memory to buddy\n\nOn the time to free xbc memory in xbc_exit(), memblock may has handed\nover memory to buddy allocator. So it doesn\u0027t make sense to free memory\nback to memblock. memblock_free() called by xbc_exit() even causes UAF bugs\non architectures with CONFIG_ARCH_KEEP_MEMBLOCK disabled like x86.\nFollowing KASAN logs shows this case.\n\nThis patch fixes the xbc memory free problem by calling memblock_free()\nin early xbc init error rewind path and calling memblock_free_late() in\nxbc exit path to free memory to buddy allocator.\n\n[    9.410890] ==================================================================\n[    9.418962] BUG: KASAN: use-after-free in memblock_isolate_range+0x12d/0x260\n[    9.426850] Read of size 8 at addr ffff88845dd30000 by task swapper/0/1\n\n[    9.435901] CPU: 9 PID: 1 Comm: swapper/0 Tainted: G     U             6.9.0-rc3-00208-g586b5dfb51b9 #5\n[    9.446403] Hardware name: Intel Corporation RPLP LP5 (CPU:RaptorLake)/RPLP LP5 (ID:13), BIOS IRPPN02.01.01.00.00.19.015.D-00000000 Dec 28 2023\n[    9.460789] Call Trace:\n[    9.463518]  \u003cTASK\u003e\n[    9.465859]  dump_stack_lvl+0x53/0x70\n[    9.469949]  print_report+0xce/0x610\n[    9.473944]  ? __virt_addr_valid+0xf5/0x1b0\n[    9.478619]  ? memblock_isolate_range+0x12d/0x260\n[    9.483877]  kasan_report+0xc6/0x100\n[    9.487870]  ? memblock_isolate_range+0x12d/0x260\n[    9.493125]  memblock_isolate_range+0x12d/0x260\n[    9.498187]  memblock_phys_free+0xb4/0x160\n[    9.502762]  ? __pfx_memblock_phys_free+0x10/0x10\n[    9.508021]  ? mutex_unlock+0x7e/0xd0\n[    9.512111]  ? __pfx_mutex_unlock+0x10/0x10\n[    9.516786]  ? kernel_init_freeable+0x2d4/0x430\n[    9.521850]  ? __pfx_kernel_init+0x10/0x10\n[    9.526426]  xbc_exit+0x17/0x70\n[    9.529935]  kernel_init+0x38/0x1e0\n[    9.533829]  ? _raw_spin_unlock_irq+0xd/0x30\n[    9.538601]  ret_from_fork+0x2c/0x50\n[    9.542596]  ? __pfx_kernel_init+0x10/0x10\n[    9.547170]  ret_from_fork_asm+0x1a/0x30\n[    9.551552]  \u003c/TASK\u003e\n\n[    9.555649] The buggy address belongs to the physical page:\n[    9.561875] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x45dd30\n[    9.570821] flags: 0x200000000000000(node=0|zone=2)\n[    9.576271] page_type: 0xffffffff()\n[    9.580167] raw: 0200000000000000 ffffea0011774c48 ffffea0012ba1848 0000000000000000\n[    9.588823] raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000\n[    9.597476] page dumped because: kasan: bad access detected\n\n[    9.605362] Memory state around the buggy address:\n[    9.610714]  ffff88845dd2ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n[    9.618786]  ffff88845dd2ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n[    9.626857] \u003effff88845dd30000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n[    9.634930]                    ^\n[    9.638534]  ffff88845dd30080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n[    9.646605]  ffff88845dd30100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\n[    9.654675] =================================================================="
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-05-29T05:26:24.420Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1e7feb31a18c197d63a5e606025ed63c762f8918"
        },
        {
          "url": "https://git.kernel.org/stable/c/e46d3be714ad9652480c6db129ab8125e2d20ab7"
        },
        {
          "url": "https://git.kernel.org/stable/c/5a7dfb8fcd3f29fc93161100179b27f24f3d5f35"
        },
        {
          "url": "https://git.kernel.org/stable/c/89f9a1e876b5a7ad884918c03a46831af202c8a0"
        }
      ],
      "title": "bootconfig: use memblock_free_late to free xbc memory to buddy",
      "x_generator": {
        "engine": "bippy-a5840b7849dd"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26983",
    "datePublished": "2024-05-01T05:27:15.635Z",
    "dateReserved": "2024-02-19T14:20:24.204Z",
    "dateUpdated": "2024-09-11T17:33:42.750Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26983\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-05-01T06:15:15.747\",\"lastModified\":\"2024-05-13T08:15:10.750\",\"vulnStatus\":\"Awaiting Analysis\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbootconfig: use memblock_free_late to free xbc memory to buddy\\n\\nOn the time to free xbc memory in xbc_exit(), memblock may has handed\\nover memory to buddy allocator. So it doesn\u0027t make sense to free memory\\nback to memblock. memblock_free() called by xbc_exit() even causes UAF bugs\\non architectures with CONFIG_ARCH_KEEP_MEMBLOCK disabled like x86.\\nFollowing KASAN logs shows this case.\\n\\nThis patch fixes the xbc memory free problem by calling memblock_free()\\nin early xbc init error rewind path and calling memblock_free_late() in\\nxbc exit path to free memory to buddy allocator.\\n\\n[    9.410890] ==================================================================\\n[    9.418962] BUG: KASAN: use-after-free in memblock_isolate_range+0x12d/0x260\\n[    9.426850] Read of size 8 at addr ffff88845dd30000 by task swapper/0/1\\n\\n[    9.435901] CPU: 9 PID: 1 Comm: swapper/0 Tainted: G     U             6.9.0-rc3-00208-g586b5dfb51b9 #5\\n[    9.446403] Hardware name: Intel Corporation RPLP LP5 (CPU:RaptorLake)/RPLP LP5 (ID:13), BIOS IRPPN02.01.01.00.00.19.015.D-00000000 Dec 28 2023\\n[    9.460789] Call Trace:\\n[    9.463518]  \u003cTASK\u003e\\n[    9.465859]  dump_stack_lvl+0x53/0x70\\n[    9.469949]  print_report+0xce/0x610\\n[    9.473944]  ? __virt_addr_valid+0xf5/0x1b0\\n[    9.478619]  ? memblock_isolate_range+0x12d/0x260\\n[    9.483877]  kasan_report+0xc6/0x100\\n[    9.487870]  ? memblock_isolate_range+0x12d/0x260\\n[    9.493125]  memblock_isolate_range+0x12d/0x260\\n[    9.498187]  memblock_phys_free+0xb4/0x160\\n[    9.502762]  ? __pfx_memblock_phys_free+0x10/0x10\\n[    9.508021]  ? mutex_unlock+0x7e/0xd0\\n[    9.512111]  ? __pfx_mutex_unlock+0x10/0x10\\n[    9.516786]  ? kernel_init_freeable+0x2d4/0x430\\n[    9.521850]  ? __pfx_kernel_init+0x10/0x10\\n[    9.526426]  xbc_exit+0x17/0x70\\n[    9.529935]  kernel_init+0x38/0x1e0\\n[    9.533829]  ? _raw_spin_unlock_irq+0xd/0x30\\n[    9.538601]  ret_from_fork+0x2c/0x50\\n[    9.542596]  ? __pfx_kernel_init+0x10/0x10\\n[    9.547170]  ret_from_fork_asm+0x1a/0x30\\n[    9.551552]  \u003c/TASK\u003e\\n\\n[    9.555649] The buggy address belongs to the physical page:\\n[    9.561875] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x45dd30\\n[    9.570821] flags: 0x200000000000000(node=0|zone=2)\\n[    9.576271] page_type: 0xffffffff()\\n[    9.580167] raw: 0200000000000000 ffffea0011774c48 ffffea0012ba1848 0000000000000000\\n[    9.588823] raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000\\n[    9.597476] page dumped because: kasan: bad access detected\\n\\n[    9.605362] Memory state around the buggy address:\\n[    9.610714]  ffff88845dd2ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\\n[    9.618786]  ffff88845dd2ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\\n[    9.626857] \u003effff88845dd30000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\\n[    9.634930]                    ^\\n[    9.638534]  ffff88845dd30080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\\n[    9.646605]  ffff88845dd30100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff\\n[    9.654675] ==================================================================\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: bootconfig: use memblock_free_late para liberar memoria xbc para el amigo En el momento de liberar memoria xbc en xbc_exit(), es posible que memblock haya entregado la memoria al asignador de amigos. Por lo tanto, no tiene sentido liberar memoria en Memblock. memblock_free() llamado por xbc_exit() incluso causa errores UAF en arquitecturas con CONFIG_ARCH_KEEP_MEMBLOCK deshabilitado como x86. Los siguientes registros de KASAN muestran este caso. Este parche soluciona el problema de falta de memoria de xbc llamando a memblock_free() en la ruta de rebobinado del error de inicio temprano de xbc y llamando a memblock_free_late() en la ruta de salida de xbc para liberar memoria al asignador de amigos. [9.410890] ================================================= =================== [9.418962] ERROR: KASAN: use-after-free en memblock_isolate_range+0x12d/0x260 [9.426850] Lectura de tama\u00f1o 8 en la direcci\u00f3n ffff88845dd30000 por el intercambiador de tareas /0/1 [ 9.435901] CPU: 9 PID: 1 Comm: swapper/0 Contaminado: GU 6.9.0-rc3-00208-g586b5dfb51b9 #5 [ 9.446403] Nombre de hardware: Intel Corporation RPLP LP5 (CPU:RaptorLake)/RPLP LP5 (ID:13), BIOS IRPPN02.01.01.00.00.19.015.D-00000000 28 de diciembre de 2023 [9.460789] Seguimiento de llamadas: [9.463518]  [9.465859] dump_stack_lvl+0x53/0x70 [9.469949] puerto+0xce/0x610 [ 9.473944] ? __virt_addr_valid+0xf5/0x1b0 [9.478619]? memblock_isolate_range+0x12d/0x260 [ 9.483877] kasan_report+0xc6/0x100 [ 9.487870] ? memblock_isolate_range+0x12d/0x260 [9.493125] memblock_isolate_range+0x12d/0x260 [9.498187] memblock_phys_free+0xb4/0x160 [9.502762]? __pfx_memblock_phys_free+0x10/0x10 [9.508021]? mutex_unlock+0x7e/0xd0 [9.512111]? __pfx_mutex_unlock+0x10/0x10 [9.516786]? kernel_init_freeable+0x2d4/0x430 [9.521850]? __pfx_kernel_init+0x10/0x10 [ 9.526426] xbc_exit+0x17/0x70 [ 9.529935] kernel_init+0x38/0x1e0 [ 9.533829] ? _raw_spin_unlock_irq+0xd/0x30 [9.538601] ret_from_fork+0x2c/0x50 [9.542596]? __pfx_kernel_init+0x10/0x10 [ 9.547170] ret_from_fork_asm+0x1a/0x30 [ 9.551552]  [ 9.555649] La direcci\u00f3n con errores pertenece a la p\u00e1gina f\u00edsica: [ 9.561875] p\u00e1gina: refcount:0 mapcount:0 mapeo:00000000000 \u00cdndice 00000: 0x1 pfn :0x45dd30 [ 9.570821] banderas: 0x200000000000000(nodo=0|zona=2) [ 9.576271] tipo de p\u00e1gina: 0xffffffff() [ 9.580167] raw: 0200000000000000 ffffea0011774c48 12ba1848 0000000000000000 [9.588823] raw: 0000000000000001 0000000000000000 00000000ffffffff 000000000000000000000000 [9.597476] p\u00e1gina volcada porque: kasan: mal acceso detectado [9.605362] Estado de la memoria alrededor de la direcci\u00f3n con errores: [9.610714] ffff88845dd2ff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 9.618786] ffff88845dd2ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 9.626857] \u0026gt;ffff88845dd30000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 9.634930] ^ [ 9.638534] ffff88845dd30080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 9.646605] ffff88845dd30100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 9.654675] ======================= ===============================================\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1e7feb31a18c197d63a5e606025ed63c762f8918\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5a7dfb8fcd3f29fc93161100179b27f24f3d5f35\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/89f9a1e876b5a7ad884918c03a46831af202c8a0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e46d3be714ad9652480c6db129ab8125e2d20ab7\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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