{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T03:43:50.111Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/fa6995eeb62e74b5a1480c73fb7b420c270784d3"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/608e13706c8b6c658a0646f09ebced74ec367f7c"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/c418afb9bf23e2f2b76cb819601e4a5d9dbab42d"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/a8d89feba7e54e691ca7c4efc2a6264fa83f3687"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-36918",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T17:16:07.190878Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:35:00.289Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/bloom_filter.c",
            "tools/testing/selftests/bpf/prog_tests/bloom_filter_map.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "fa6995eeb62e74b5a1480c73fb7b420c270784d3",
              "status": "affected",
              "version": "9330986c03006ab1d33d243b7cfe598a7a3c1baa",
              "versionType": "git"
            },
            {
              "lessThan": "608e13706c8b6c658a0646f09ebced74ec367f7c",
              "status": "affected",
              "version": "9330986c03006ab1d33d243b7cfe598a7a3c1baa",
              "versionType": "git"
            },
            {
              "lessThan": "c418afb9bf23e2f2b76cb819601e4a5d9dbab42d",
              "status": "affected",
              "version": "9330986c03006ab1d33d243b7cfe598a7a3c1baa",
              "versionType": "git"
            },
            {
              "lessThan": "a8d89feba7e54e691ca7c4efc2a6264fa83f3687",
              "status": "affected",
              "version": "9330986c03006ab1d33d243b7cfe598a7a3c1baa",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/bloom_filter.c",
            "tools/testing/selftests/bpf/prog_tests/bloom_filter_map.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            },
            {
              "lessThan": "5.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.31",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.8.*",
              "status": "unaffected",
              "version": "6.8.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.9",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.91",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.31",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8.10",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.9",
                  "versionStartIncluding": "5.16",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Check bloom filter map value size\n\nThis patch adds a missing check to bloom filter creating, rejecting\nvalues above KMALLOC_MAX_SIZE. This brings the bloom map in line with\nmany other map types.\n\nThe lack of this protection can cause kernel crashes for value sizes\nthat overflow int\u0027s. Such a crash was caught by syzkaller. The next\npatch adds more guard-rails at a lower level."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is reached purely through the `bpf()` syscall \u2014 `BPF_MAP_CREATE` for a bloom-filter map with an oversized `value_size`, then `BPF_PROG_LOAD` of a program calling `bpf_map_push_elem()` on it. No network or remote-peer input is involved.\nAC:L - Triggering is fully deterministic and attacker-controlled: pick any `value_size \u003e= 0x80000000` and any negative stack offset, and the signed overflow in `max_off + access_size` fires every time. There is no race, no timing window, and no memory-layout precondition needed to reach the out-of-bounds loop.\nPR:L - `bpf_map_push_elem` is in the unprivileged section of `bpf_base_func_proto()`, and bloom-filter map creation has no per-map-type capability gate at all on 5.16\u20136.3 (only `sysctl_unprivileged_bpf_disabled`), while on 6.9 a delegated bpffs BPF token grants `ns_capable(userns, CAP_BPF)` to an unprivileged containerized process. CAP_BPF is a deliberately reduced, non-root privilege routinely held by ordinary service accounts, so a basic low-privileged local context suffices.\nUI:N - The attacker performs the entire sequence \u2014 map creation plus program load \u2014 from their own process. No other user or administrator has to do anything.\nS:U - The corruption occurs in kernel heap memory belonging to the BPF verifier, within the same security authority as the exploiting process. No hypervisor, IOMMU, or other trust boundary is crossed.\nC:H - The loop performs unbounded negative-index reads of `state-\u003estack[spi].slot_type[]` and `spilled_ptr`, and `mark_reg_read()` chases an out-of-bounds `parent` pointer, giving an out-of-bounds kernel-heap read primitive that a heap-groomed attacker can leverage for arbitrary memory disclosure.\nI:H - With `clobber = true` the loop writes `*stype = STACK_MISC` out of bounds, `__mark_reg_unknown()`/`scrub_spilled_slot()` write a full `bpf_reg_state` and 8-byte slots out of bounds, and `mark_reg_read()` ORs `REG_LIVE_READ64` into an attacker-influenced wild pointer \u2014 an out-of-bounds write usable for control-flow hijacking.\nA:H - The overflowed loop iterates roughly two billion times descending ~120 bytes per 8 iterations, so it walks tens of gigabytes below the `stack` allocation and reliably faults on unmapped memory, producing a kernel oops/panic that any local user with map-create access can trigger at will."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:32:03.979Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/fa6995eeb62e74b5a1480c73fb7b420c270784d3"
        },
        {
          "url": "https://git.kernel.org/stable/c/608e13706c8b6c658a0646f09ebced74ec367f7c"
        },
        {
          "url": "https://git.kernel.org/stable/c/c418afb9bf23e2f2b76cb819601e4a5d9dbab42d"
        },
        {
          "url": "https://git.kernel.org/stable/c/a8d89feba7e54e691ca7c4efc2a6264fa83f3687"
        }
      ],
      "title": "bpf: Check bloom filter map value size",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-36918",
    "datePublished": "2024-05-30T15:29:13.904Z",
    "dateReserved": "2024-05-30T15:25:07.068Z",
    "dateUpdated": "2026-08-05T11:32:03.979Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}