CVE-2024-50161 (GCVE-0-2024-50161)

Vulnerability from cvelistv5 – Published: 2024-11-07 09:31 – Updated: 2026-05-11 20:46
VLAI
Title
bpf: Check the remaining info_cnt before repeating btf fields
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.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-129 - Improper Validation of Array Index
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 64e8ee814819f21beeeda00d4119221443d77992 , < 6f957d972feee9b385ea3ae6530310a84e55ba71 (git)
Affected: 64e8ee814819f21beeeda00d4119221443d77992 , < 797d73ee232dd1833dec4824bc53a22032e97c1c (git)
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Linux Linux Affected: 6.11
Unaffected: 0 , < 6.11 (semver)
Unaffected: 6.11.6 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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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 ... 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      "title": "kernel: bpf: Check the remaining info_cnt before repeating btf fields",
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    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-50161\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-10-01T20:20:20.703840Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-129\", \"description\": \"CWE-129 Improper Validation of Array Index\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-10-01T15:18:29.932Z\"}}], \"cna\": {\"title\": \"bpf: Check the remaining info_cnt before repeating btf fields\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"64e8ee814819f21beeeda00d4119221443d77992\", \"lessThan\": \"6f957d972feee9b385ea3ae6530310a84e55ba71\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"64e8ee814819f21beeeda00d4119221443d77992\", \"lessThan\": \"797d73ee232dd1833dec4824bc53a22032e97c1c\", \"versionType\": \"git\"}], \"programFiles\": [\"kernel/bpf/btf.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.11\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.11\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.11.6\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"kernel/bpf/btf.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/6f957d972feee9b385ea3ae6530310a84e55ba71\"}, {\"url\": \"https://git.kernel.org/stable/c/797d73ee232dd1833dec4824bc53a22032e97c1c\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.6\", \"versionStartIncluding\": \"6.11\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12\", \"versionStartIncluding\": \"6.11\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:47:35.386Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-50161\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-01T20:27:12.187Z\", \"dateReserved\": \"2024-10-21T19:36:19.961Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-11-07T09:31:38.118Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.