{
  "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-2026-63830",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-63830",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-07-19T12:02:23.741Z",
    "updatedAt": "2026-10-19T20:07:49.188Z",
    "importedAt": "2026-10-24T01:58:20.586Z",
    "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": "net: skmsg: preserve sg.copy across SG transforms",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: skmsg: preserve sg.copy across SG transforms\n\nThe sk_msg sg.copy bitmap is part of the scatterlist entry ownership\nstate. A set bit tells sk_msg_compute_data_pointers() not to expose the\nentry through writable BPF ctx->data. This protects entries backed by\npages that are not private to the sk_msg, such as splice-backed file\npage-cache pages.\n\nSeveral sk_msg transform paths move, copy, split, or compact\nmsg->sg.data[] entries without moving the matching sg.copy bit. This can\nmake an externally backed entry arrive at a new slot with a clear copy\nbit. A later SK_MSG verdict can then expose sg_virt(sge) as writable\nctx->data and BPF stores can modify the original page cache.\n\nKeep sg.copy synchronized with sg.data[] whenever entries are\ntransferred, shifted, split, or copied into a new sk_msg. Clear the bit\nwhen an entry is replaced by a newly allocated private page or freed.\nThis covers the BPF pull/push/pop helpers, sk_msg_shift_left/right(),\nsk_msg_xfer(), and tls_split_open_record(), including the partial tail\nentry created during TLS open-record splitting.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "d3b18ad31f93d0b6bae105c679018a1ba7daa9ca",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f126eed589eec6f201405abbc398844042ef6d57"
            },
            {
              "version": "d3b18ad31f93d0b6bae105c679018a1ba7daa9ca",
              "status": "affected",
              "versionType": "git",
              "lessThan": "31a110642b5fb5e61940cbcfb503445ac4f28017"
            },
            {
              "version": "d3b18ad31f93d0b6bae105c679018a1ba7daa9ca",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9bb86d8184b37503816150c4a6ad3c17dfdbe827"
            },
            {
              "version": "d3b18ad31f93d0b6bae105c679018a1ba7daa9ca",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0eb4c16c4adb262763bda870a8ed38a1a9dec7ec"
            },
            {
              "version": "d3b18ad31f93d0b6bae105c679018a1ba7daa9ca",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d22cc92bc41290e5783a72375e0843d9435f6001"
            },
            {
              "version": "d3b18ad31f93d0b6bae105c679018a1ba7daa9ca",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1acdd14c0990dd1cd4b6534f00366d2e6dfce05f"
            },
            {
              "version": "d3b18ad31f93d0b6bae105c679018a1ba7daa9ca",
              "status": "affected",
              "versionType": "git",
              "lessThan": "21ed9540a8e1906dfcbc1bb82ba9b4de4fa4bd6d"
            },
            {
              "version": "d3b18ad31f93d0b6bae105c679018a1ba7daa9ca",
              "status": "affected",
              "versionType": "git",
              "lessThan": "406e8a651a7b854c41fecd5117bb282b3a6c2c6b"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.20",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.20"
            },
            {
              "version": "5.10.261",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.212",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.177",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.144",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.95",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.38",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}