net: team: free skb when broadcast has no txable port

{
  "id": "6f3ddf95d81fb391770b7841bad13530b3d90f70537cd6e1cc4bac072eabc07c",
  "url": "https://osv.dev/vulnerability/CVE-2026-99026",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: team: free skb when broadcast has no txable port",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net: team: free skb when broadcast has no txable port bc_transmit() sends the original skb through the last txable port. When no port is txable, it returns false without consuming the skb, but team_xmit() still returns NETDEV_TX_OK. AF_PACKET sends then retain the skb and its socket write-memory charge. A TX-enabled, link-down port keeps the broadcast transmit op installed. Carrier can stay up through a second link-up, TX-disabled port or be forced on by userspace. Free the original skb on the no-port path while leaving the existing drop accounting intact. Discovered by Sashiko during review of previous commit.",
    "evidence": "osv:CVE-2026-99026",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.57",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.11",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-99026",
      "aliases": [
        "CVE-2026-99026"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5fc889911a99043a97da1daa0d010ad72cbc3042"
                },
                {
                  "fixed": "961563117626f4681623077ec0cfd86f86da0d49"
                },
                {
                  "fixed": "f34b1bcac4581a5bd3daf9eff90f175e736b54aa"
                },
                {
                  "fixed": "489114c9ecae44e523361a4b3e610ee5ebd9189c"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-99026.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "3.6.0"
                },
                {
                  "fixed": "6.18.57"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.11"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-99026.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:27.838927513Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/489114c9ecae44e523361a4b3e610ee5ebd9189c",
        "https://git.kernel.org/stable/c/961563117626f4681623077ec0cfd86f86da0d49",
        "https://git.kernel.org/stable/c/f34b1bcac4581a5bd3daf9eff90f175e736b54aa",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99026.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-99026",
        "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/2026/99xxx/CVE-2026-99026.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-99026",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 494480,
  "published_at": "2026-10-23T12:21:13.509+00:00"
}