{
  "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-2026-89789",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-89789",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-16T08:48:25.689Z",
    "updatedAt": "2026-10-19T08:52:43.083Z",
    "importedAt": "2026-10-24T01:58:35.090Z",
    "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": "gtp: add synchronize_net() in gtp_newlink() error path to prevent use-after-free",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\ngtp: add synchronize_net() in gtp_newlink() error path to prevent use-after-free\n\ngtp_newlink()'s error path frees tid_hash and addr_hash without\nwaiting for an RCU grace period after clearing sk_user_data. A\nconcurrent gtp_encap_recv() in softirq may still hold the gtp_dev\npointer obtained via rcu_dereference_sk_user_data() and access the\nfreed memory.\n\n  BUG: KASAN: slab-use-after-free in gtp0_pdp_find+0x1f6/0x200 (gtp.c:152)\n  Call Trace:\n   <IRQ>\n   gtp0_pdp_find+0x1f6/0x200\n   gtp_encap_recv+0x527/0x24b0\n   udp_queue_rcv_one_skb+0x75f/0xc10\n\nAdd synchronize_net() before the kfree calls in out_hashtable, which\ncovers all error paths from both gtp_encap_enable() and\ngtp_create_sockets().",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "459aa660eb1d8ce67080da1983bb81d716aa5a69",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fcafb2b1430824bae4258c01a439ec97ca0c6973"
            },
            {
              "version": "459aa660eb1d8ce67080da1983bb81d716aa5a69",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3ca3da5c305caa873ddb81e8c6b118143f6dd3d1"
            },
            {
              "version": "459aa660eb1d8ce67080da1983bb81d716aa5a69",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6f815c2fb6ab20385f81c353cdad0ea3b88132af"
            },
            {
              "version": "459aa660eb1d8ce67080da1983bb81d716aa5a69",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e3b9aa0773abd5d4ed90be41ce5306c146d5b09e"
            },
            {
              "version": "459aa660eb1d8ce67080da1983bb81d716aa5a69",
              "status": "affected",
              "versionType": "git",
              "lessThan": "fd8396cfecbd904468c71362f08aaa25f96d5337"
            },
            {
              "version": "459aa660eb1d8ce67080da1983bb81d716aa5a69",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7677eb2cbf2cc7446de474c01a6b06277c0051e5"
            },
            {
              "version": "459aa660eb1d8ce67080da1983bb81d716aa5a69",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8d85498016a5bb56339734a14c276209fa65bafc"
            },
            {
              "version": "459aa660eb1d8ce67080da1983bb81d716aa5a69",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d989e22ae9802c52c56ad4284d0caf26696cf6ae"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.7",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.7"
            },
            {
              "version": "5.10.270",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.221",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.188",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.157",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.110",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.52",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}