usb: typec: tipd: fix uninitialized typec_partner_desc in cd321x_update_work()

{
  "id": "b54be77038910ddca1d34238301e81efee20be4d269c1f9333aba7993cda72c8",
  "url": "https://osv.dev/vulnerability/CVE-2026-98759",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "usb: typec: tipd: fix uninitialized typec_partner_desc in cd321x_update_work()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: usb: typec: tipd: fix uninitialized typec_partner_desc in cd321x_update_work() cd321x_update_work() passes a stack-allocated typec_partner_desc to typec_register_partner() after initializing only usb_pd, accessory and identity. typec_register_partner() copies attach and deattach from the descriptor into the partner. With those fields left unset, garbage function pointers may be stored and later invoked from typec_partner_link_device() when a USB device is linked to the port. Uninitialized pd_revision and usb_capability similarly leak stack data through partner sysfs. Zero-initialize the descriptor so optional callbacks remain NULL and the remaining fields are zero.",
    "evidence": "osv:CVE-2026-98759",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.56",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-98759",
      "aliases": [
        "CVE-2026-98759"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "82432bbfb9e83b7e81d04660fe129b99a29b2ac2"
                },
                {
                  "fixed": "75dc6cb377efd2f4428b7f76d3a590a0bbc10399"
                },
                {
                  "fixed": "5414144e202a32437e3eb436cd3f5f00d79ad86e"
                },
                {
                  "fixed": "88c7e458af53ff781a3f1051708395892b325576"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98759.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.18.0"
                },
                {
                  "fixed": "6.18.56"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.10"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98759.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.277502695Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/5414144e202a32437e3eb436cd3f5f00d79ad86e",
        "https://git.kernel.org/stable/c/75dc6cb377efd2f4428b7f76d3a590a0bbc10399",
        "https://git.kernel.org/stable/c/88c7e458af53ff781a3f1051708395892b325576",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98759.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-98759",
        "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-2026-98759.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-98759",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 498310,
  "published_at": "2026-10-18T15:47:47.988+00:00"
}