cve-2024-50161
Vulnerability from cvelistv5
Published
2024-11-07 09:31
Modified
2024-12-19 09:34
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Check the remaining info_cnt before repeating btf fields When trying to repeat the btf fields for array of nested struct, it doesn't check the remaining info_cnt. The following splat will be reported when the value of ret * nelems is greater than BTF_FIELDS_MAX: ------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in ../kernel/bpf/btf.c:3951:49 index 11 is out of range for type 'btf_field_info [11]' CPU: 6 UID: 0 PID: 411 Comm: test_progs ...... 6.11.0-rc4+ #1 Tainted: [O]=OOT_MODULE Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ... Call Trace: <TASK> dump_stack_lvl+0x57/0x70 dump_stack+0x10/0x20 ubsan_epilogue+0x9/0x40 __ubsan_handle_out_of_bounds+0x6f/0x80 ? kallsyms_lookup_name+0x48/0xb0 btf_parse_fields+0x992/0xce0 map_create+0x591/0x770 __sys_bpf+0x229/0x2410 __x64_sys_bpf+0x1f/0x30 x64_sys_call+0x199/0x9f0 do_syscall_64+0x3b/0xc0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7fea56f2cc5d ...... </TASK> ---[ end trace ]--- Fix it by checking the remaining info_cnt in btf_repeat_fields() before repeating the btf fields.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6f957d972feee9b385ea3ae6530310a84e55ba71Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/797d73ee232dd1833dec4824bc53a22032e97c1cPatch
Impacted products
Vendor Product Version
Linux Linux Version: 6.11
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/btf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6f957d972feee9b385ea3ae6530310a84e55ba71",
              "status": "affected",
              "version": "64e8ee814819f21beeeda00d4119221443d77992",
              "versionType": "git"
            },
            {
              "lessThan": "797d73ee232dd1833dec4824bc53a22032e97c1c",
              "status": "affected",
              "version": "64e8ee814819f21beeeda00d4119221443d77992",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/btf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.11"
            },
            {
              "lessThan": "6.11",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.11.*",
              "status": "unaffected",
              "version": "6.11.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.12",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Check the remaining info_cnt before repeating btf fields\n\nWhen trying to repeat the btf fields for array of nested struct, it\ndoesn\u0027t check the remaining info_cnt. The following splat will be\nreported when the value of ret * nelems is greater than BTF_FIELDS_MAX:\n\n  ------------[ cut here ]------------\n  UBSAN: array-index-out-of-bounds in ../kernel/bpf/btf.c:3951:49\n  index 11 is out of range for type \u0027btf_field_info [11]\u0027\n  CPU: 6 UID: 0 PID: 411 Comm: test_progs ...... 6.11.0-rc4+ #1\n  Tainted: [O]=OOT_MODULE\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ...\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0x57/0x70\n   dump_stack+0x10/0x20\n   ubsan_epilogue+0x9/0x40\n   __ubsan_handle_out_of_bounds+0x6f/0x80\n   ? kallsyms_lookup_name+0x48/0xb0\n   btf_parse_fields+0x992/0xce0\n   map_create+0x591/0x770\n   __sys_bpf+0x229/0x2410\n   __x64_sys_bpf+0x1f/0x30\n   x64_sys_call+0x199/0x9f0\n   do_syscall_64+0x3b/0xc0\n   entry_SYSCALL_64_after_hwframe+0x4b/0x53\n  RIP: 0033:0x7fea56f2cc5d\n  ......\n   \u003c/TASK\u003e\n  ---[ end trace ]---\n\nFix it by checking the remaining info_cnt in btf_repeat_fields() before\nrepeating the btf fields."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-12-19T09:34:24.268Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6f957d972feee9b385ea3ae6530310a84e55ba71"
        },
        {
          "url": "https://git.kernel.org/stable/c/797d73ee232dd1833dec4824bc53a22032e97c1c"
        }
      ],
      "title": "bpf: Check the remaining info_cnt before repeating btf fields",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-50161",
    "datePublished": "2024-11-07T09:31:38.118Z",
    "dateReserved": "2024-10-21T19:36:19.961Z",
    "dateUpdated": "2024-12-19T09:34:24.268Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-50161\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-11-07T10:15:07.480\",\"lastModified\":\"2024-11-13T16:36:57.413\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf: Check the remaining info_cnt before repeating btf fields\\n\\nWhen trying to repeat the btf fields for array of nested struct, it\\ndoesn\u0027t check the remaining info_cnt. The following splat will be\\nreported when the value of ret * nelems is greater than BTF_FIELDS_MAX:\\n\\n  ------------[ cut here ]------------\\n  UBSAN: array-index-out-of-bounds in ../kernel/bpf/btf.c:3951:49\\n  index 11 is out of range for type \u0027btf_field_info [11]\u0027\\n  CPU: 6 UID: 0 PID: 411 Comm: test_progs ...... 6.11.0-rc4+ #1\\n  Tainted: [O]=OOT_MODULE\\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ...\\n  Call Trace:\\n   \u003cTASK\u003e\\n   dump_stack_lvl+0x57/0x70\\n   dump_stack+0x10/0x20\\n   ubsan_epilogue+0x9/0x40\\n   __ubsan_handle_out_of_bounds+0x6f/0x80\\n   ? kallsyms_lookup_name+0x48/0xb0\\n   btf_parse_fields+0x992/0xce0\\n   map_create+0x591/0x770\\n   __sys_bpf+0x229/0x2410\\n   __x64_sys_bpf+0x1f/0x30\\n   x64_sys_call+0x199/0x9f0\\n   do_syscall_64+0x3b/0xc0\\n   entry_SYSCALL_64_after_hwframe+0x4b/0x53\\n  RIP: 0033:0x7fea56f2cc5d\\n  ......\\n   \u003c/TASK\u003e\\n  ---[ end trace ]---\\n\\nFix it by checking the remaining info_cnt in btf_repeat_fields() before\\nrepeating the btf fields.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: Verificar el info_cnt restante antes de repetir los campos btf Al intentar repetir los campos btf para una matriz de estructuras anidadas, no verifica el info_cnt restante. Se informar\u00e1 el siguiente error cuando el valor de ret * nelems sea mayor que BTF_FIELDS_MAX: ------------[ cortar aqu\u00ed ]------------ UBSAN: array-index-out-of-bounds en ../kernel/bpf/btf.c:3951:49 el \u00edndice 11 est\u00e1 fuera de rango para el tipo \u0027btf_field_info [11]\u0027 CPU: 6 UID: 0 PID: 411 Comm: test_progs ...... 6.11.0-rc4+ #1 Tainted: [O]=OOT_MODULE Nombre del hardware: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ... Seguimiento de llamadas:  dump_stack_lvl+0x57/0x70 dump_stack+0x10/0x20 ubsan_epilogue+0x9/0x40 __ubsan_handle_fuera_de_l\u00edmites+0x6f/0x80 ? kallsyms_lookup_name+0x48/0xb0 btf_parse_fields+0x992/0xce0 map_create+0x591/0x770 __sys_bpf+0x229/0x2410 __x64_sys_bpf+0x1f/0x30 x64_sys_call+0x199/0x9f0 do_syscall_64+0x3b/0xc0 entry_SYSCALL_64_after_hwframe+0x4b/0x53 RIP: 0033:0x7fea56f2cc5d ......  ---[ fin del seguimiento ]--- Arr\u00e9glelo comprobando el info_cnt restante en btf_repeat_fields() antes de repetir los campos btf.\"}],\"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\":\"CWE-129\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.11\",\"versionEndExcluding\":\"6.11.6\",\"matchCriteriaId\":\"35973F0F-C32F-4D88-B0FE-C75F65A0002B\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"7F361E1D-580F-4A2D-A509-7615F73167A1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"925478D0-3E3D-4E6F-ACD5-09F28D5DF82C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.12:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"3C95E234-D335-4B6C-96BF-E2CEBD8654ED\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/6f957d972feee9b385ea3ae6530310a84e55ba71\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/797d73ee232dd1833dec4824bc53a22032e97c1c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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