bpf: mark a NULL call argument precise

{
  "id": "5c775dd930c566ac1355b0c141f65099576def77cebd93ff97dd5243b81ed934",
  "url": "https://osv.dev/vulnerability/CVE-2026-98019",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "bpf: mark a NULL call argument precise",
    "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.",
    "evidence": "osv:CVE-2026-98019",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.160",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.114",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.57",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.7",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-98019",
      "aliases": [
        "CVE-2026-98019"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "b5dc0163d8fd78e64a7e21f309cf932fda34353e"
                },
                {
                  "fixed": "febbb66e682d8328f7c5bcbdd5e4291abab2e858"
                },
                {
                  "fixed": "627089c278df58749f25686c6a3caf7e181b5951"
                },
                {
                  "fixed": "b1fe6379e401b8ce0f561cb4d84af2b70b4343c3"
                },
                {
                  "fixed": "69a9ad004ccf5d45e534c7d503f47f643abe64b7"
                },
                {
                  "fixed": "1a3a10b030c96ea88868ccc060a16827c01eaa5a"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98019.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.3.0"
                },
                {
                  "fixed": "6.6.160"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.114"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.57"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.7"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98019.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.162783569Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1a3a10b030c96ea88868ccc060a16827c01eaa5a",
        "https://git.kernel.org/stable/c/627089c278df58749f25686c6a3caf7e181b5951",
        "https://git.kernel.org/stable/c/69a9ad004ccf5d45e534c7d503f47f643abe64b7",
        "https://git.kernel.org/stable/c/b1fe6379e401b8ce0f561cb4d84af2b70b4343c3",
        "https://git.kernel.org/stable/c/febbb66e682d8328f7c5bcbdd5e4291abab2e858",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98019.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-98019",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98019.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-98019",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 492041,
  "published_at": "2026-09-25T10:23:40.303+00:00"
}