ovpn: replace bind when clearing stale local source

{
  "id": "4add422ea2bee08497e900646fb61969a3b007a84d0cfcfe17757821ba22d0df",
  "url": "https://osv.dev/vulnerability/CVE-2026-98603",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ovpn: replace bind when clearing stale local source",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ovpn: replace bind when clearing stale local source The UDP output fallback clears bind->local in place when the remembered source address is no longer usable. The bind is RCU-published and read locklessly by concurrent TX, so an IPv6 reader can observe a torn address. Retry the route lookup with source address autoselection without modifying the bind. After a successful lookup, revalidate the bind and route key under peer->lock, reset the dst cache, and best-effort publish a replacement bind with a wildcard local address. Do not cache the resolved dst when clearing the local source. Replacing the source invalidates all per-CPU cache entries, while dst_cache_set_ip4 and dst_cache_set_ip6 update only the current CPU slot. The current packet can still use the resolved route; if bind allocation fails, a later cache miss retries the repair.",
    "evidence": "osv:CVE-2026-98603",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.18.55",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-98603",
      "aliases": [
        "CVE-2026-98603"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "08857b5ec5d91d83e69e40a36554a8c7557b7301"
                },
                {
                  "fixed": "c44a04722f7dae9a45a101b8e100931ab59f1c18"
                },
                {
                  "fixed": "72bd1bea37ea2c8553938f086bf48ccd2147dfe1"
                },
                {
                  "fixed": "7d8104988f423572df1f3347ce578037b1043f34"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98603.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.16.0"
                },
                {
                  "fixed": "6.18.55"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "7.2.9"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98603.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:50.581506135Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/72bd1bea37ea2c8553938f086bf48ccd2147dfe1",
        "https://git.kernel.org/stable/c/7d8104988f423572df1f3347ce578037b1043f34",
        "https://git.kernel.org/stable/c/c44a04722f7dae9a45a101b8e100931ab59f1c18",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98603.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-98603",
        "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-2026-98603.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-98603",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 519092,
  "published_at": "2026-10-18T15:19:16.215+00:00"
}