FKIE_CVE-2026-74720

Vulnerability from fkie_nvd - Published: 2026-08-22 16:16 - Updated: 2026-10-14 13:10
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Preserve pointer state for commuted arithmetic When scalar += pointer is handled in adjust_ptr_min_max_vals(), the destination register inherits the pointer state from the source pointer. Copying only selected fields is fragile because pointer provenance is tracked by several bpf_reg_state fields. Use the caller's temporary offset register to preserve the scalar operand while replacing the destination with the full pointer state. This preserves the frame number for PTR_TO_STACK registers and keeps parent identity fields consistent.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/29c239f8dbec5ab33a61796724d189bddee6cd4b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8109c25e0c41f5f19a1c2380bb49c991a877494e
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/86b203aadc2930e0a4f9c6277b5b80ff3664c472
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8cb23101a3fcc7432b451ea3d0f14a90711f4acf
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a4c6f804b44c5c790269b25e0e61cf4e9f117c86
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d1959028190a7649b926f5867a58de5fe221b23c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/db6382ed3361bdd8129572a3423956cba1dae829
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/eaffa1495e4fe6330aeff9f323ea3d48b01f118a
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "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": "86b203aadc2930e0a4f9c6277b5b80ff3664c472",
              "status": "affected",
              "version": "f4d7e40a5b7157e1329c3c5b10f60d8289fc2941",
              "versionType": "git"
            },
            {
              "lessThan": "8109c25e0c41f5f19a1c2380bb49c991a877494e",
              "status": "affected",
              "version": "f4d7e40a5b7157e1329c3c5b10f60d8289fc2941",
              "versionType": "git"
            },
            {
              "lessThan": "d1959028190a7649b926f5867a58de5fe221b23c",
              "status": "affected",
              "version": "f4d7e40a5b7157e1329c3c5b10f60d8289fc2941",
              "versionType": "git"
            },
            {
              "lessThan": "8cb23101a3fcc7432b451ea3d0f14a90711f4acf",
              "status": "affected",
              "version": "f4d7e40a5b7157e1329c3c5b10f60d8289fc2941",
              "versionType": "git"
            },
            {
              "lessThan": "29c239f8dbec5ab33a61796724d189bddee6cd4b",
              "status": "affected",
              "version": "f4d7e40a5b7157e1329c3c5b10f60d8289fc2941",
              "versionType": "git"
            },
            {
              "lessThan": "db6382ed3361bdd8129572a3423956cba1dae829",
              "status": "affected",
              "version": "f4d7e40a5b7157e1329c3c5b10f60d8289fc2941",
              "versionType": "git"
            },
            {
              "lessThan": "eaffa1495e4fe6330aeff9f323ea3d48b01f118a",
              "status": "affected",
              "version": "f4d7e40a5b7157e1329c3c5b10f60d8289fc2941",
              "versionType": "git"
            },
            {
              "lessThan": "a4c6f804b44c5c790269b25e0e61cf4e9f117c86",
              "status": "affected",
              "version": "f4d7e40a5b7157e1329c3c5b10f60d8289fc2941",
              "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": "4.16"
            },
            {
              "lessThan": "4.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.152",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.104",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.45",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Preserve pointer state for commuted arithmetic\n\nWhen scalar += pointer is handled in adjust_ptr_min_max_vals(), the\ndestination register inherits the pointer state from the source pointer.\nCopying only selected fields is fragile because pointer provenance is\ntracked by several bpf_reg_state fields.\n\nUse the caller\u0027s temporary offset register to preserve the scalar operand\nwhile replacing the destination with the full pointer state. This preserves\nthe frame number for PTR_TO_STACK registers and keeps parent identity\nfields consistent."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbpf: Preservar el estado del puntero para aritm\u00e9tica conmutada\n\nCuando se maneja scalar += pointer en adjust_ptr_min_max_vals(), el registro de destino hereda el estado del puntero del puntero de origen. Copiar solo campos seleccionados es fr\u00e1gil porque la procedencia del puntero es rastreada por varios campos de bpf_reg_state.\n\nUsar el registro de desplazamiento temporal del llamador para preservar el operando escalar mientras se reemplaza el destino con el estado completo del puntero. Esto preserva el n\u00famero de marco para los registros PTR_TO_STACK y mantiene consistentes los campos de identidad del padre."
    }
  ],
  "id": "CVE-2026-74720",
  "lastModified": "2026-10-14T13:10:00.187",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-22T16:16:46.957",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/29c239f8dbec5ab33a61796724d189bddee6cd4b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8109c25e0c41f5f19a1c2380bb49c991a877494e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/86b203aadc2930e0a4f9c6277b5b80ff3664c472"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8cb23101a3fcc7432b451ea3d0f14a90711f4acf"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a4c6f804b44c5c790269b25e0e61cf4e9f117c86"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d1959028190a7649b926f5867a58de5fe221b23c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/db6382ed3361bdd8129572a3423956cba1dae829"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/eaffa1495e4fe6330aeff9f323ea3d48b01f118a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    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.