CVE-2026-98403 affecting package kernel 6.6.157.1-1

{
  "id": "0bf0e780746193d43666ce5ce476e5a7c3dd1edf47633a4e9295478079b62dc3",
  "url": "https://osv.dev/vulnerability/AZL-108102",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-98403 affecting package kernel 6.6.157.1-1",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: s390/boot: Avoid IPL parameter append past command line A command line may occupy all but the terminating byte of COMMAND_LINE_SIZE. In that case append_ipl_block_parm() passes a zero size to the IPL parameter conversion helpers and points the destination one byte past early_command_line. The helpers subtract one from the unsigned size and write the converted parameter outside the command line buffer. Convert the IPL parameter in the command line parsing buffer first. A parameter beginning with '=' can then replace the existing command line regardless of its length, while other parameters are appended only when space remains.",
    "evidence": "osv:AZL-108102",
    "products": [
      {
        "name": {
          "value": "kernel",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "AZL-108102",
      "aliases": [
        "AZL-108102"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "6.6.157.1-1"
                }
              ]
            }
          ],
          "package": {
            "name": "kernel",
            "purl": "pkg:rpm/azure-linux/kernel",
            "ecosystem": "Azure Linux:3"
          },
          "database_specific": {
            "source": "https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-108102.json"
          }
        }
      ],
      "modified": "2026-10-15T14:16:41.002409804Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-98403"
      ],
      "references": [
        "https://nvd.nist.gov/vuln/detail/CVE-2026-98403"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-98403",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 332581,
  "published_at": "2026-10-14T14:17:51+00:00"
}