FKIE_CVE-2026-74720

Vulnerability from fkie_nvd - Published: 2026-08-22 16:16 - Updated: 2026-08-22 16:16
Severity
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."
    }
  ],
  "id": "CVE-2026-74720",
  "lastModified": "2026-08-22T16:16:46.957",
  "metrics": {},
  "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"
}



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