CVE-2026-74720 (GCVE-0-2026-74720)

Vulnerability from cvelistv5 – Published: 2026-08-22 15:33 – Updated: 2026-08-22 15:33
VLAI
Title
bpf: Preserve pointer state for commuted arithmetic
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f4d7e40a5b7157e1329c3c5b10f60d8289fc2941 , < 86b203aadc2930e0a4f9c6277b5b80ff3664c472 (git)
Affected: f4d7e40a5b7157e1329c3c5b10f60d8289fc2941 , < 8109c25e0c41f5f19a1c2380bb49c991a877494e (git)
Affected: f4d7e40a5b7157e1329c3c5b10f60d8289fc2941 , < d1959028190a7649b926f5867a58de5fe221b23c (git)
Affected: f4d7e40a5b7157e1329c3c5b10f60d8289fc2941 , < 8cb23101a3fcc7432b451ea3d0f14a90711f4acf (git)
Affected: f4d7e40a5b7157e1329c3c5b10f60d8289fc2941 , < 29c239f8dbec5ab33a61796724d189bddee6cd4b (git)
Affected: f4d7e40a5b7157e1329c3c5b10f60d8289fc2941 , < db6382ed3361bdd8129572a3423956cba1dae829 (git)
Affected: f4d7e40a5b7157e1329c3c5b10f60d8289fc2941 , < eaffa1495e4fe6330aeff9f323ea3d48b01f118a (git)
Affected: f4d7e40a5b7157e1329c3c5b10f60d8289fc2941 , < a4c6f804b44c5c790269b25e0e61cf4e9f117c86 (git)
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Linux Linux Affected: 4.16
Unaffected: 0 , < 4.16 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.152 , ≤ 6.6.* (semver)
Unaffected: 6.12.104 , ≤ 6.12.* (semver)
Unaffected: 6.18.45 , ≤ 6.18.* (semver)
Unaffected: 7.1.9 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
            "kernel/bpf/verifier.c"
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          "vendor": "Linux",
          "versions": [
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              "version": "4.16"
            },
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              "status": "unaffected",
              "version": "0",
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              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "5.15.*",
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              "version": "7.2",
              "versionType": "original_commit_for_fix"
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      "cpeApplicability": [
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              "negate": false,
              "operator": "OR"
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      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-22T15:33:13.342Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/86b203aadc2930e0a4f9c6277b5b80ff3664c472"
        },
        {
          "url": "https://git.kernel.org/stable/c/8109c25e0c41f5f19a1c2380bb49c991a877494e"
        },
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          "url": "https://git.kernel.org/stable/c/d1959028190a7649b926f5867a58de5fe221b23c"
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          "url": "https://git.kernel.org/stable/c/8cb23101a3fcc7432b451ea3d0f14a90711f4acf"
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          "url": "https://git.kernel.org/stable/c/a4c6f804b44c5c790269b25e0e61cf4e9f117c86"
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      "title": "bpf: Preserve pointer state for commuted arithmetic",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74720",
    "datePublished": "2026-08-22T15:33:13.342Z",
    "dateReserved": "2026-08-15T05:44:03.929Z",
    "dateUpdated": "2026-08-22T15:33:13.342Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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  }
}



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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.