{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2025-71128",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-71128",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2026-01-14T15:07:44.941Z",
    "updatedAt": "2026-10-19T18:15:15.302Z",
    "importedAt": "2026-10-24T01:57:44.935Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "erspan: Initialize options_len before referencing options.",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nerspan: Initialize options_len before referencing options.\n\nThe struct ip_tunnel_info has a flexible array member named\noptions that is protected by a counted_by(options_len)\nattribute.\n\nThe compiler will use this information to enforce runtime bounds\nchecking deployed by FORTIFY_SOURCE string helpers.\n\nAs laid out in the GCC documentation, the counter must be\ninitialized before the first reference to the flexible array\nmember.\n\nAfter scanning through the files that use struct ip_tunnel_info\nand also refer to options or options_len, it appears the normal\ncase is to use the ip_tunnel_info_opts_set() helper.\n\nSaid helper would initialize options_len properly before copying\ndata into options, however in the GRE ERSPAN code a partial\nupdate is done, preventing the use of the helper function.\n\nBefore this change the handling of ERSPAN traffic in GRE tunnels\nwould cause a kernel panic when the kernel is compiled with\nGCC 15+ and having FORTIFY_SOURCE configured:\n\nmemcpy: detected buffer overflow: 4 byte write of buffer size 0\n\nCall Trace:\n <IRQ>\n __fortify_panic+0xd/0xf\n erspan_rcv.cold+0x68/0x83\n ? ip_route_input_slow+0x816/0x9d0\n gre_rcv+0x1b2/0x1c0\n gre_rcv+0x8e/0x100\n ? raw_v4_input+0x2a0/0x2b0\n ip_protocol_deliver_rcu+0x1ea/0x210\n ip_local_deliver_finish+0x86/0x110\n ip_local_deliver+0x65/0x110\n ? ip_rcv_finish_core+0xd6/0x360\n ip_rcv+0x186/0x1a0\n\nReported-at: https://launchpad.net/bugs/2129580",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "bb5e62f2d547c4de6d1b144cbce2373a76c33f18",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b282b2a9eed848587c1348abdd5d83fa346a2743"
            },
            {
              "version": "bb5e62f2d547c4de6d1b144cbce2373a76c33f18",
              "status": "affected",
              "versionType": "git",
              "lessThan": "35ddf66c65eff93fff91406756ba273600bf61a3"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.15",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.15"
            },
            {
              "version": "6.18.4",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}