cve-2026-63993

{
  "document": {
    "aggregate_severity": {
      "namespace": "https://www.suse.com/support/security/rating/",
      "text": "important"
    },
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright 2024 SUSE LLC. All rights reserved.",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "summary",
        "text": "SUSE CVE-2026-63993",
        "title": "Title"
      },
      {
        "category": "description",
        "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: do not reuse cached ip_hdr() value after skb_tunnel_check_pmtu()\n\nskb_tunnel_check_pmtu() can change skb->head.\n\nReusing old_iph afer skb_tunnel_check_pmtu() can cause an UAF.\n\nUse instead ip_hdr(skb) as done in drivers/net/bareudp.c\nand drivers/net/geneve.c.\n\nFound by Sashiko.",
        "title": "Description of the CVE"
      },
      {
        "category": "legal_disclaimer",
        "text": "CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).",
        "title": "Terms of use"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://www.suse.com/support/security/contact/",
      "name": "SUSE Product Security Team",
      "namespace": "https://www.suse.com/"
    },
    "references": [
      {
        "category": "external",
        "summary": "CVE-2026-63993",
        "url": "https://www.suse.com/security/cve/CVE-2026-63993"
      },
      {
        "category": "external",
        "summary": "SUSE Security Ratings",
        "url": "https://www.suse.com/support/security/rating/"
      }
    ],
    "title": "SUSE CVE CVE-2026-63993",
    "tracking": {
      "current_release_date": "2026-07-30T16:33:55Z",
      "generator": {
        "date": "2026-07-21T13:01:59Z",
        "engine": {
          "name": "cve-database.git:bin/generate-csaf-vex.pl",
          "version": "1"
        }
      },
      "id": "CVE-2026-63993",
      "initial_release_date": "2026-07-21T13:01:59Z",
      "revision_history": [
        {
          "date": "2026-07-21T13:01:59Z",
          "number": "2",
          "summary": "references added,severity changed from  to critical"
        },
        {
          "date": "2026-07-30T16:33:55Z",
          "number": "3",
          "summary": "severity changed from critical to important"
        }
      ],
      "status": "interim",
      "version": "3"
    }
  }
}