CVE-2022-49623 (GCVE-0-2022-49623)
Vulnerability from cvelistv5
Published
2025-02-26 02:23
Modified
2025-10-01 19:36
Summary
In the Linux kernel, the following vulnerability has been resolved: powerpc/xive/spapr: correct bitmap allocation size kasan detects access beyond the end of the xibm->bitmap allocation: BUG: KASAN: slab-out-of-bounds in _find_first_zero_bit+0x40/0x140 Read of size 8 at addr c00000001d1d0118 by task swapper/0/1 CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.19.0-rc2-00001-g90df023b36dd #28 Call Trace: [c00000001d98f770] [c0000000012baab8] dump_stack_lvl+0xac/0x108 (unreliable) [c00000001d98f7b0] [c00000000068faac] print_report+0x37c/0x710 [c00000001d98f880] [c0000000006902c0] kasan_report+0x110/0x354 [c00000001d98f950] [c000000000692324] __asan_load8+0xa4/0xe0 [c00000001d98f970] [c0000000011c6ed0] _find_first_zero_bit+0x40/0x140 [c00000001d98f9b0] [c0000000000dbfbc] xive_spapr_get_ipi+0xcc/0x260 [c00000001d98fa70] [c0000000000d6d28] xive_setup_cpu_ipi+0x1e8/0x450 [c00000001d98fb30] [c000000004032a20] pSeries_smp_probe+0x5c/0x118 [c00000001d98fb60] [c000000004018b44] smp_prepare_cpus+0x944/0x9ac [c00000001d98fc90] [c000000004009f9c] kernel_init_freeable+0x2d4/0x640 [c00000001d98fd90] [c0000000000131e8] kernel_init+0x28/0x1d0 [c00000001d98fe10] [c00000000000cd54] ret_from_kernel_thread+0x5c/0x64 Allocated by task 0: kasan_save_stack+0x34/0x70 __kasan_kmalloc+0xb4/0xf0 __kmalloc+0x268/0x540 xive_spapr_init+0x4d0/0x77c pseries_init_irq+0x40/0x27c init_IRQ+0x44/0x84 start_kernel+0x2a4/0x538 start_here_common+0x1c/0x20 The buggy address belongs to the object at c00000001d1d0118 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 0 bytes inside of 8-byte region [c00000001d1d0118, c00000001d1d0120) The buggy address belongs to the physical page: page:c00c000000074740 refcount:1 mapcount:0 mapping:0000000000000000 index:0xc00000001d1d0558 pfn:0x1d1d flags: 0x7ffff000000200(slab|node=0|zone=0|lastcpupid=0x7ffff) raw: 007ffff000000200 c00000001d0003c8 c00000001d0003c8 c00000001d010480 raw: c00000001d1d0558 0000000001e1000a 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: c00000001d1d0000: fc 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc c00000001d1d0080: fc fc 00 fc fc fc fc fc fc fc fc fc fc fc fc fc >c00000001d1d0100: fc fc fc 02 fc fc fc fc fc fc fc fc fc fc fc fc ^ c00000001d1d0180: fc fc fc fc 04 fc fc fc fc fc fc fc fc fc fc fc c00000001d1d0200: fc fc fc fc fc 04 fc fc fc fc fc fc fc fc fc fc This happens because the allocation uses the wrong unit (bits) when it should pass (BITS_TO_LONGS(count) * sizeof(long)) or equivalent. With small numbers of bits, the allocated object can be smaller than sizeof(long), which results in invalid accesses. Use bitmap_zalloc() to allocate and initialize the irq bitmap, paired with bitmap_free() for consistency.
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.1,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2022-49623",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T19:34:34.646128Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-125",
                "description": "CWE-125 Out-of-bounds Read",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T19:36:50.564Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/sysdev/xive/spapr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "10f2cd373e65bcd3be8f3cdc71c330c25763dfd8",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "99d1c36bddd93919072b5a51a89297bbb5ad6a6f",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "19fc5bb93c6bbdce8292b4d7eed04e2fa118d2fe",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/sysdev/xive/spapr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.56",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/xive/spapr: correct bitmap allocation size\n\nkasan detects access beyond the end of the xibm-\u003ebitmap allocation:\n\nBUG: KASAN: slab-out-of-bounds in _find_first_zero_bit+0x40/0x140\nRead of size 8 at addr c00000001d1d0118 by task swapper/0/1\n\nCPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.19.0-rc2-00001-g90df023b36dd #28\nCall Trace:\n[c00000001d98f770] [c0000000012baab8] dump_stack_lvl+0xac/0x108 (unreliable)\n[c00000001d98f7b0] [c00000000068faac] print_report+0x37c/0x710\n[c00000001d98f880] [c0000000006902c0] kasan_report+0x110/0x354\n[c00000001d98f950] [c000000000692324] __asan_load8+0xa4/0xe0\n[c00000001d98f970] [c0000000011c6ed0] _find_first_zero_bit+0x40/0x140\n[c00000001d98f9b0] [c0000000000dbfbc] xive_spapr_get_ipi+0xcc/0x260\n[c00000001d98fa70] [c0000000000d6d28] xive_setup_cpu_ipi+0x1e8/0x450\n[c00000001d98fb30] [c000000004032a20] pSeries_smp_probe+0x5c/0x118\n[c00000001d98fb60] [c000000004018b44] smp_prepare_cpus+0x944/0x9ac\n[c00000001d98fc90] [c000000004009f9c] kernel_init_freeable+0x2d4/0x640\n[c00000001d98fd90] [c0000000000131e8] kernel_init+0x28/0x1d0\n[c00000001d98fe10] [c00000000000cd54] ret_from_kernel_thread+0x5c/0x64\n\nAllocated by task 0:\n kasan_save_stack+0x34/0x70\n __kasan_kmalloc+0xb4/0xf0\n __kmalloc+0x268/0x540\n xive_spapr_init+0x4d0/0x77c\n pseries_init_irq+0x40/0x27c\n init_IRQ+0x44/0x84\n start_kernel+0x2a4/0x538\n start_here_common+0x1c/0x20\n\nThe buggy address belongs to the object at c00000001d1d0118\n which belongs to the cache kmalloc-8 of size 8\nThe buggy address is located 0 bytes inside of\n 8-byte region [c00000001d1d0118, c00000001d1d0120)\n\nThe buggy address belongs to the physical page:\npage:c00c000000074740 refcount:1 mapcount:0 mapping:0000000000000000 index:0xc00000001d1d0558 pfn:0x1d1d\nflags: 0x7ffff000000200(slab|node=0|zone=0|lastcpupid=0x7ffff)\nraw: 007ffff000000200 c00000001d0003c8 c00000001d0003c8 c00000001d010480\nraw: c00000001d1d0558 0000000001e1000a 00000001ffffffff 0000000000000000\npage dumped because: kasan: bad access detected\n\nMemory state around the buggy address:\n c00000001d1d0000: fc 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc\n c00000001d1d0080: fc fc 00 fc fc fc fc fc fc fc fc fc fc fc fc fc\n\u003ec00000001d1d0100: fc fc fc 02 fc fc fc fc fc fc fc fc fc fc fc fc\n                            ^\n c00000001d1d0180: fc fc fc fc 04 fc fc fc fc fc fc fc fc fc fc fc\n c00000001d1d0200: fc fc fc fc fc 04 fc fc fc fc fc fc fc fc fc fc\n\nThis happens because the allocation uses the wrong unit (bits) when it\nshould pass (BITS_TO_LONGS(count) * sizeof(long)) or equivalent. With small\nnumbers of bits, the allocated object can be smaller than sizeof(long),\nwhich results in invalid accesses.\n\nUse bitmap_zalloc() to allocate and initialize the irq bitmap, paired with\nbitmap_free() for consistency."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T08:42:00.979Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/10f2cd373e65bcd3be8f3cdc71c330c25763dfd8"
        },
        {
          "url": "https://git.kernel.org/stable/c/99d1c36bddd93919072b5a51a89297bbb5ad6a6f"
        },
        {
          "url": "https://git.kernel.org/stable/c/19fc5bb93c6bbdce8292b4d7eed04e2fa118d2fe"
        }
      ],
      "title": "powerpc/xive/spapr: correct bitmap allocation size",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49623",
    "datePublished": "2025-02-26T02:23:39.834Z",
    "dateReserved": "2025-02-26T02:21:30.420Z",
    "dateUpdated": "2025-10-01T19:36:50.564Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49623\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:01:37.663\",\"lastModified\":\"2025-10-01T20:16:57.890\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\npowerpc/xive/spapr: correct bitmap allocation size\\n\\nkasan detects access beyond the end of the xibm-\u003ebitmap allocation:\\n\\nBUG: KASAN: slab-out-of-bounds in _find_first_zero_bit+0x40/0x140\\nRead of size 8 at addr c00000001d1d0118 by task swapper/0/1\\n\\nCPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.19.0-rc2-00001-g90df023b36dd #28\\nCall Trace:\\n[c00000001d98f770] [c0000000012baab8] dump_stack_lvl+0xac/0x108 (unreliable)\\n[c00000001d98f7b0] [c00000000068faac] print_report+0x37c/0x710\\n[c00000001d98f880] [c0000000006902c0] kasan_report+0x110/0x354\\n[c00000001d98f950] [c000000000692324] __asan_load8+0xa4/0xe0\\n[c00000001d98f970] [c0000000011c6ed0] _find_first_zero_bit+0x40/0x140\\n[c00000001d98f9b0] [c0000000000dbfbc] xive_spapr_get_ipi+0xcc/0x260\\n[c00000001d98fa70] [c0000000000d6d28] xive_setup_cpu_ipi+0x1e8/0x450\\n[c00000001d98fb30] [c000000004032a20] pSeries_smp_probe+0x5c/0x118\\n[c00000001d98fb60] [c000000004018b44] smp_prepare_cpus+0x944/0x9ac\\n[c00000001d98fc90] [c000000004009f9c] kernel_init_freeable+0x2d4/0x640\\n[c00000001d98fd90] [c0000000000131e8] kernel_init+0x28/0x1d0\\n[c00000001d98fe10] [c00000000000cd54] ret_from_kernel_thread+0x5c/0x64\\n\\nAllocated by task 0:\\n kasan_save_stack+0x34/0x70\\n __kasan_kmalloc+0xb4/0xf0\\n __kmalloc+0x268/0x540\\n xive_spapr_init+0x4d0/0x77c\\n pseries_init_irq+0x40/0x27c\\n init_IRQ+0x44/0x84\\n start_kernel+0x2a4/0x538\\n start_here_common+0x1c/0x20\\n\\nThe buggy address belongs to the object at c00000001d1d0118\\n which belongs to the cache kmalloc-8 of size 8\\nThe buggy address is located 0 bytes inside of\\n 8-byte region [c00000001d1d0118, c00000001d1d0120)\\n\\nThe buggy address belongs to the physical page:\\npage:c00c000000074740 refcount:1 mapcount:0 mapping:0000000000000000 index:0xc00000001d1d0558 pfn:0x1d1d\\nflags: 0x7ffff000000200(slab|node=0|zone=0|lastcpupid=0x7ffff)\\nraw: 007ffff000000200 c00000001d0003c8 c00000001d0003c8 c00000001d010480\\nraw: c00000001d1d0558 0000000001e1000a 00000001ffffffff 0000000000000000\\npage dumped because: kasan: bad access detected\\n\\nMemory state around the buggy address:\\n c00000001d1d0000: fc 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc\\n c00000001d1d0080: fc fc 00 fc fc fc fc fc fc fc fc fc fc fc fc fc\\n\u003ec00000001d1d0100: fc fc fc 02 fc fc fc fc fc fc fc fc fc fc fc fc\\n                            ^\\n c00000001d1d0180: fc fc fc fc 04 fc fc fc fc fc fc fc fc fc fc fc\\n c00000001d1d0200: fc fc fc fc fc 04 fc fc fc fc fc fc fc fc fc fc\\n\\nThis happens because the allocation uses the wrong unit (bits) when it\\nshould pass (BITS_TO_LONGS(count) * sizeof(long)) or equivalent. With small\\nnumbers of bits, the allocated object can be smaller than sizeof(long),\\nwhich results in invalid accesses.\\n\\nUse bitmap_zalloc() to allocate and initialize the irq bitmap, paired with\\nbitmap_free() for consistency.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/xive/spapr: tama\u00f1o de asignaci\u00f3n de mapa de bits correcto kasan detecta acceso m\u00e1s all\u00e1 del final de la asignaci\u00f3n xibm-\u0026gt;bitmap: ERROR: KASAN: slab-out-of-bounds en _find_first_zero_bit+0x40/0x140 Lectura de tama\u00f1o 8 en la direcci\u00f3n c00000001d1d0118 by task swapper/0/1 CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.19.0-rc2-00001-g90df023b36dd #28 Call Trace: [c00000001d98f770] [c0000000012baab8] dump_stack_lvl+0xac/0x108 (unreliable) [c00000001d98f7b0] [c00000000068faac] print_report+0x37c/0x710 [c00000001d98f880] [c0000000006902c0] kasan_report+0x110/0x354 [c00000001d98f950] [c000000000692324] __asan_load8+0xa4/0xe0 [c00000001d98f970] [c0000000011c6ed0] _find_first_zero_bit+0x40/0x140 [c00000001d98f9b0] [c0000000000dbfbc] xive_spapr_get_ipi+0xcc/0x260 [c00000001d98fa70] [c0000000000d6d28] xive_setup_cpu_ipi+0x1e8/0x450 [c00000001d98fb30] [c000000004032a20] pSeries_smp_probe+0x5c/0x118 [c00000001d98fb60] [c000000004018b44] smp_prepare_cpus+0x944/0x9ac [c00000001d98fc90] [c000000004009f9c] kernel_init_freeable+0x2d4/0x640 [c00000001d98fd90] [c0000000000131e8] kernel_init+0x28/0x1d0 [c00000001d98fe10] [c00000000000cd54] ret_from_kernel_thread+0x5c/0x64 Allocated by task 0: kasan_save_stack+0x34/0x70 __kasan_kmalloc+0xb4/0xf0 __kmalloc+0x268/0x540 xive_spapr_init+0x4d0/0x77c pseries_init_irq+0x40/0x27c init_IRQ+0x44/0x84 start_kernel+0x2a4/0x538 start_here_common+0x1c/0x20 The buggy address belongs to the object at c00000001d1d0118 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 0 bytes inside of 8-byte region [c00000001d1d0118, c00000001d1d0120) The buggy address belongs to the physical page: page:c00c000000074740 refcount:1 mapcount:0 mapping:0000000000000000 index:0xc00000001d1d0558 pfn:0x1d1d flags: 0x7ffff000000200(slab|node=0|zone=0|lastcpupid=0x7ffff) raw: 007ffff000000200 c00000001d0003c8 c00000001d0003c8 c00000001d010480 raw: c00000001d1d0558 0000000001e1000a 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: c00000001d1d0000: fc 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc c00000001d1d0080: fc fc 00 fc fc fc fc fc fc fc fc fc fc fc fc fc \u0026gt;c00000001d1d0100: fc fc fc 02 fc fc fc fc fc fc fc fc fc fc fc fc ^ c00000001d1d0180: fc fc fc fc 04 fc fc fc fc fc fc fc fc fc fc fc c00000001d1d0200: fc fc fc fc fc 04 fc fc fc fc fc fc fc fc fc fc esto sucede porque la asignaci\u00f3n utiliza la unidad incorrecta (bits) cuando deber\u00eda pasar (BITS_TO_LONGS(count) * sizeof(long)) o equivalente. Con una peque\u00f1a cantidad de bits, el objeto asignado puede ser m\u00e1s peque\u00f1o que sizeof(long), lo que genera accesos no v\u00e1lidos. Utilice bitmap_zalloc() para asignar e inicializar el mapa de bits de irq, junto con bitmap_free() para mantener la coherencia.\"}],\"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:H/I:N/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-125\"}]},{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-125\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"5.15.56\",\"matchCriteriaId\":\"2AE4EB02-9AE9-4E43-9205-BC9D6E9BFEA7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.18.13\",\"matchCriteriaId\":\"640221A7-96EE-4B48-8FE1-BA810131789B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"A8C30C2D-F82D-4D37-AB48-D76ABFBD5377\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"BF8547FC-C849-4F1B-804B-A93AE2F04A92\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F3068028-F453-4A1C-B80F-3F5609ACEF60\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"2E9C0DB0-D349-489F-A3D6-B77214E93A8A\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/10f2cd373e65bcd3be8f3cdc71c330c25763dfd8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/19fc5bb93c6bbdce8292b4d7eed04e2fa118d2fe\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/99d1c36bddd93919072b5a51a89297bbb5ad6a6f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"cna\": {\"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T08:42:00.979Z\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\npowerpc/xive/spapr: correct bitmap allocation size\\n\\nkasan detects access beyond the end of the xibm-\u003ebitmap allocation:\\n\\nBUG: KASAN: slab-out-of-bounds in _find_first_zero_bit+0x40/0x140\\nRead of size 8 at addr c00000001d1d0118 by task swapper/0/1\\n\\nCPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.19.0-rc2-00001-g90df023b36dd #28\\nCall Trace:\\n[c00000001d98f770] [c0000000012baab8] dump_stack_lvl+0xac/0x108 (unreliable)\\n[c00000001d98f7b0] [c00000000068faac] print_report+0x37c/0x710\\n[c00000001d98f880] [c0000000006902c0] kasan_report+0x110/0x354\\n[c00000001d98f950] [c000000000692324] __asan_load8+0xa4/0xe0\\n[c00000001d98f970] [c0000000011c6ed0] _find_first_zero_bit+0x40/0x140\\n[c00000001d98f9b0] [c0000000000dbfbc] xive_spapr_get_ipi+0xcc/0x260\\n[c00000001d98fa70] [c0000000000d6d28] xive_setup_cpu_ipi+0x1e8/0x450\\n[c00000001d98fb30] [c000000004032a20] pSeries_smp_probe+0x5c/0x118\\n[c00000001d98fb60] [c000000004018b44] smp_prepare_cpus+0x944/0x9ac\\n[c00000001d98fc90] [c000000004009f9c] kernel_init_freeable+0x2d4/0x640\\n[c00000001d98fd90] [c0000000000131e8] kernel_init+0x28/0x1d0\\n[c00000001d98fe10] [c00000000000cd54] ret_from_kernel_thread+0x5c/0x64\\n\\nAllocated by task 0:\\n kasan_save_stack+0x34/0x70\\n __kasan_kmalloc+0xb4/0xf0\\n __kmalloc+0x268/0x540\\n xive_spapr_init+0x4d0/0x77c\\n pseries_init_irq+0x40/0x27c\\n init_IRQ+0x44/0x84\\n start_kernel+0x2a4/0x538\\n start_here_common+0x1c/0x20\\n\\nThe buggy address belongs to the object at c00000001d1d0118\\n which belongs to the cache kmalloc-8 of size 8\\nThe buggy address is located 0 bytes inside of\\n 8-byte region [c00000001d1d0118, c00000001d1d0120)\\n\\nThe buggy address belongs to the physical page:\\npage:c00c000000074740 refcount:1 mapcount:0 mapping:0000000000000000 index:0xc00000001d1d0558 pfn:0x1d1d\\nflags: 0x7ffff000000200(slab|node=0|zone=0|lastcpupid=0x7ffff)\\nraw: 007ffff000000200 c00000001d0003c8 c00000001d0003c8 c00000001d010480\\nraw: c00000001d1d0558 0000000001e1000a 00000001ffffffff 0000000000000000\\npage dumped because: kasan: bad access detected\\n\\nMemory state around the buggy address:\\n c00000001d1d0000: fc 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc\\n c00000001d1d0080: fc fc 00 fc fc fc fc fc fc fc fc fc fc fc fc fc\\n\u003ec00000001d1d0100: fc fc fc 02 fc fc fc fc fc fc fc fc fc fc fc fc\\n                            ^\\n c00000001d1d0180: fc fc fc fc 04 fc fc fc fc fc fc fc fc fc fc fc\\n c00000001d1d0200: fc fc fc fc fc 04 fc fc fc fc fc fc fc fc fc fc\\n\\nThis happens because the allocation uses the wrong unit (bits) when it\\nshould pass (BITS_TO_LONGS(count) * sizeof(long)) or equivalent. With small\\nnumbers of bits, the allocated object can be smaller than sizeof(long),\\nwhich results in invalid accesses.\\n\\nUse bitmap_zalloc() to allocate and initialize the irq bitmap, paired with\\nbitmap_free() for consistency.\"}], \"affected\": [{\"product\": \"Linux\", \"vendor\": \"Linux\", \"defaultStatus\": \"unaffected\", \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"programFiles\": [\"arch/powerpc/sysdev/xive/spapr.c\"], \"versions\": [{\"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"10f2cd373e65bcd3be8f3cdc71c330c25763dfd8\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"99d1c36bddd93919072b5a51a89297bbb5ad6a6f\", \"status\": \"affected\", \"versionType\": \"git\"}, {\"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"19fc5bb93c6bbdce8292b4d7eed04e2fa118d2fe\", \"status\": \"affected\", \"versionType\": \"git\"}]}, {\"product\": \"Linux\", \"vendor\": \"Linux\", \"defaultStatus\": \"affected\", \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"programFiles\": [\"arch/powerpc/sysdev/xive/spapr.c\"], \"versions\": [{\"version\": \"5.15.56\", \"lessThanOrEqual\": \"5.15.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"5.18.13\", \"lessThanOrEqual\": \"5.18.*\", \"status\": \"unaffected\", \"versionType\": \"semver\"}, {\"version\": \"5.19\", \"lessThanOrEqual\": \"*\", \"status\": \"unaffected\", \"versionType\": \"original_commit_for_fix\"}]}], \"cpeApplicability\": [{\"nodes\": [{\"operator\": \"OR\", \"negate\": false, \"cpeMatch\": [{\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"5.15.56\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"5.18.13\"}, {\"vulnerable\": true, \"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"versionEndExcluding\": \"5.19\"}]}]}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/10f2cd373e65bcd3be8f3cdc71c330c25763dfd8\"}, {\"url\": \"https://git.kernel.org/stable/c/99d1c36bddd93919072b5a51a89297bbb5ad6a6f\"}, {\"url\": \"https://git.kernel.org/stable/c/19fc5bb93c6bbdce8292b4d7eed04e2fa118d2fe\"}], \"title\": \"powerpc/xive/spapr: correct bitmap allocation size\", \"x_generator\": {\"engine\": \"bippy-1.2.0\"}}, \"adp\": [{\"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.1, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-49623\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-10-01T19:34:34.646128Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-125\", \"description\": \"CWE-125 Out-of-bounds Read\"}]}], \"providerMetadata\": {\"shortName\": \"CISA-ADP\", \"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"dateUpdated\": \"2025-10-01T16:51:54.128Z\"}, \"title\": \"CISA ADP Vulnrichment\"}]}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-49623\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"state\": \"PUBLISHED\", \"assignerShortName\": \"Linux\", \"dateReserved\": \"2025-02-26T02:21:30.420Z\", \"datePublished\": \"2025-02-26T02:23:39.834Z\", \"dateUpdated\": \"2025-05-04T08:42:00.979Z\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • 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.


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