{
  "cveId": "CVE-2026-99211",
  "url": "https://patchblox.com/security/cve/CVE-2026-99211",
  "summary": "CVE-2026-99211 is fixed in linux on 1 platform by DEBIAN-CVE-2026-99211 (version 6.12.115-2), released November 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "netlink: reset skb headers before unicast and multicast filtering",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  netlink: reset skb headers before unicast and multicast filtering  Socket filters can use SKF_NET_OFF and SKF_LL_OFF to read relative to an skb\u0027s network and MAC headers. Netlink producers may reserve headroom without resetting those headers, allowing a receiving socket\u0027s filter to read data before the initialized message.  For example, IWPM HELLO replies are allocated with dev_alloc_skb(), which reserves NET_SKB_PAD bytes. An unprivileged NETLINK_RDMA user can attach a classic socket filter and disclose this headroom through the length of the delivered reply. The resets in netlink_dump() do not help because IWPM sends a separately allocated skb through netlink_unicast().  Reset both headers before running the receiver\u0027s filter in unicast and broadcast delivery, as is already done for dump skbs. This also covers other netlink producers that reserve headroom without changing their allocation or message-building code.",
  "published": "2026-10-28T11:17:42Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "epss": 0.00167,
  "epssPercentile": 0.05979,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-99211",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.115-2",
      "fix": "DEBIAN-CVE-2026-99211",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-99211",
      "released": "2026-11-03T18:58:21Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}