CVE-2026-98019 (GCVE-0-2026-98019)
Vulnerability from cvelistv5
Published
2026-09-25 10:23
Modified
2026-10-21 12:54
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: mark a NULL call argument precise check_func_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. check_helper_call() enforces second parameter of the bpf_get_local_storage() to be zero, w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Grouping these two into one patch, as they share the same fixes tag.
References
Impacted products
Vendor Product Version
Linux Linux Version: b5dc0163d8fd78e64a7e21f309cf932fda34353e
Version: b5dc0163d8fd78e64a7e21f309cf932fda34353e
Version: b5dc0163d8fd78e64a7e21f309cf932fda34353e
Version: b5dc0163d8fd78e64a7e21f309cf932fda34353e
Version: b5dc0163d8fd78e64a7e21f309cf932fda34353e
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{
  "containers": {
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/bpf/verifier.c",
            "tools/testing/selftests/bpf/progs/verifier_subprog_precision.c"
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "5.3"
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              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.18.57",
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              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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: mark a NULL call argument precise\n\ncheck_func_arg() allows bpf_register_is_null() for nullable arguments\nw/o marking the underlying scalar register precise. Hence a checkpoint\ncreated on such a path would prune against arbitrary scalar value.\n\ncheck_helper_call() enforces second parameter of the\nbpf_get_local_storage() to be zero, w/o marking the underlying scalar\nregister precise. Hence a checkpoint created on such a path would\nprune against arbitrary scalar value.\n\nGrouping these two into one patch, as they share the same fixes tag."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-21T12:54:04.100Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/febbb66e682d8328f7c5bcbdd5e4291abab2e858"
        },
        {
          "url": "https://git.kernel.org/stable/c/627089c278df58749f25686c6a3caf7e181b5951"
        },
        {
          "url": "https://git.kernel.org/stable/c/b1fe6379e401b8ce0f561cb4d84af2b70b4343c3"
        },
        {
          "url": "https://git.kernel.org/stable/c/69a9ad004ccf5d45e534c7d503f47f643abe64b7"
        },
        {
          "url": "https://git.kernel.org/stable/c/1a3a10b030c96ea88868ccc060a16827c01eaa5a"
        }
      ],
      "title": "bpf: mark a NULL call argument precise",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98019",
    "datePublished": "2026-09-25T10:23:40.303Z",
    "dateReserved": "2026-09-25T10:19:56.069Z",
    "dateUpdated": "2026-10-21T12:54:04.100Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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