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CVE-2024-56768 (GCVE-0-2024-56768)

Vulnerability from cvelistv5 – Published: 2025-01-06 16:20 – Updated: 2026-05-11 20:58
VLAI
Title
bpf: Fix bpf_get_smp_processor_id() on !CONFIG_SMP
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix bpf_get_smp_processor_id() on !CONFIG_SMP On x86-64 calling bpf_get_smp_processor_id() in a kernel with CONFIG_SMP disabled can trigger the following bug, as pcpu_hot is unavailable: [ 8.471774] BUG: unable to handle page fault for address: 00000000936a290c [ 8.471849] #PF: supervisor read access in kernel mode [ 8.471881] #PF: error_code(0x0000) - not-present page Fix by inlining a return 0 in the !CONFIG_SMP case.
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 · CISA-ADP (v2.0.3)
Decision recorded 2025-10-01 19:56 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1ae6921009e5d72787e07ccc04754514ccf6bc99 , < f4ab7d74247b0150547cf909b3f6f24ee85183df (git)
Affected: 1ae6921009e5d72787e07ccc04754514ccf6bc99 , < 23579010cf0a12476e96a5f1acdf78a9c5843657 (git)
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Linux Linux Affected: 6.10
Unaffected: 0 , < 6.10 (semver)
Unaffected: 6.12.8 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

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            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "kernel/bpf/verifier.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "f4ab7d74247b0150547cf909b3f6f24ee85183df",
                  "status": "affected",
                  "version": "1ae6921009e5d72787e07ccc04754514ccf6bc99",
                  "versionType": "git"
                },
                {
                  "lessThan": "23579010cf0a12476e96a5f1acdf78a9c5843657",
                  "status": "affected",
                  "version": "1ae6921009e5d72787e07ccc04754514ccf6bc99",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "kernel/bpf/verifier.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "6.10"
                },
                {
                  "lessThan": "6.10",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.12.*",
                  "status": "unaffected",
                  "version": "6.12.8",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.13",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.12.8",
                      "versionStartIncluding": "6.10",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.13",
                      "versionStartIncluding": "6.10",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix bpf_get_smp_processor_id() on !CONFIG_SMP\n\nOn x86-64 calling bpf_get_smp_processor_id() in a kernel with CONFIG_SMP\ndisabled can trigger the following bug, as pcpu_hot is unavailable:\n\n [    8.471774] BUG: unable to handle page fault for address: 00000000936a290c\n [    8.471849] #PF: supervisor read access in kernel mode\n [    8.471881] #PF: error_code(0x0000) - not-present page\n\nFix by inlining a return 0 in the !CONFIG_SMP case."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-05-04T10:04:16.289Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/f4ab7d74247b0150547cf909b3f6f24ee85183df"
            },
            {
              "url": "https://git.kernel.org/stable/c/23579010cf0a12476e96a5f1acdf78a9c5843657"
            }
          ],
          "title": "bpf: Fix bpf_get_smp_processor_id() on !CONFIG_SMP",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-56768",
        "datePublished": "2025-01-06T16:20:46.133Z",
        "dateReserved": "2024-12-29T11:26:39.762Z",
        "dateUpdated": "2025-10-01T20:07:00.952Z",
        "state": "PUBLISHED"
      },
      "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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.