{
  "cveId": "CVE-2026-98288",
  "url": "https://patchblox.com/security/cve/CVE-2026-98288",
  "summary": "CVE-2026-98288 is fixed in linux on 1 platform by DEBIAN-CVE-2026-98288 (version 7.2.8-1), released October 6, 2026. It is not reported as exploited. Patch Radar priority: Urgent.",
  "title": "net: stmmac: fix TSO header length truncation",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  net: stmmac: fix TSO header length truncation  stmmac_tso_xmit() stores the protocol header length returned by stmmac_tso_header_size() in a u8. stmmac_tso_valid_packet() admits headers up to 1023 bytes, so a header longer than 255 bytes wraps modulo 256 (486 becomes 230, 256 becomes 0).  A TCP over IPv6 socket carrying a few hundred bytes of sticky destination/hop-by-hop options makes skb_tcp_all_headers() exceed 255 while staying below the 1023-byte limit, so such an skb reaches stmmac_tso_xmit().  Widen proto_hdr_len to unsigned int, which is sufficient since the value is bounded by the hardware limit, and adjust the debug print specifier accordingly.",
  "published": "2026-10-06T09:18:19Z",
  "severity": "Critical",
  "cvss": 9.8,
  "epss": 0.00155,
  "epssPercentile": 0.04691,
  "priority": "Urgent",
  "priorityTier": 2,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98288",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.8-1",
      "fix": "DEBIAN-CVE-2026-98288",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98288",
      "released": "2026-10-06T21:56:27Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}