{
  "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-2026-97964",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-97964",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-25T10:23:07.350Z",
    "updatedAt": "2026-10-19T09:11:30.152Z",
    "importedAt": "2026-10-24T01:58:41.756Z",
    "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": "ppp_synctty: ensure a writeable skb header",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nppp_synctty: ensure a writeable skb header\n\nppp_sync_txmunge() checks headroom before prepending the address and\ncontrol bytes, but does not ensure that the skb header is writable.\nA received skb can reach this function through PPP channel bridging\nwithout passing through ppp_start_xmit(), which calls skb_cow_head().\n\nFor example, a PPPoE frame may share its buffer with a clone queued to\nan AF_PACKET socket. If it is bridged to a synchronous tty channel, the\naddress/control bytes can overwrite data still visible to that socket.\n\nUse skb_cow_head() to ensure both sufficient headroom and a writable\nheader.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "4cf476ced45d7f12df30a68e833b263e7a2202d1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "25e03eeead2c49748c7582dfb64c205f93a42d00"
            },
            {
              "version": "4cf476ced45d7f12df30a68e833b263e7a2202d1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a256f9925288ef47de8febed5c38d5cc21340211"
            },
            {
              "version": "4cf476ced45d7f12df30a68e833b263e7a2202d1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7953946f68262a8bb137aa101249adef6e029652"
            },
            {
              "version": "4cf476ced45d7f12df30a68e833b263e7a2202d1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3af7797fbabc84992e0ca5ad2bc0ca8537d053ef"
            },
            {
              "version": "4cf476ced45d7f12df30a68e833b263e7a2202d1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0996c3e6bcc6ae08cb371ed43648c9f7f748ae6e"
            },
            {
              "version": "4cf476ced45d7f12df30a68e833b263e7a2202d1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "15d0a6c9a42df2d745c37510dba828f6dbe60d9f"
            },
            {
              "version": "4cf476ced45d7f12df30a68e833b263e7a2202d1",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8aaeb56aff2a557a88f83ae866da2c91ad247e59"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.11",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.11"
            },
            {
              "version": "5.15.222",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.189",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.158",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.111",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.53",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.7",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}