{
  "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-2025-21926",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-21926",
    "idYear": 2025,
    "status": "PUBLISHED",
    "publishedAt": "2025-04-01T15:40:57.882Z",
    "updatedAt": "2026-10-15T01:05:12.371Z",
    "importedAt": "2026-10-24T01:57:29.455Z",
    "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: gso: fix ownership in __udp_gso_segment",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: gso: fix ownership in __udp_gso_segment\n\nIn __udp_gso_segment the skb destructor is removed before segmenting the\nskb but the socket reference is kept as-is. This is an issue if the\noriginal skb is later orphaned as we can hit the following bug:\n\n  kernel BUG at ./include/linux/skbuff.h:3312!  (skb_orphan)\n  RIP: 0010:ip_rcv_core+0x8b2/0xca0\n  Call Trace:\n   ip_rcv+0xab/0x6e0\n   __netif_receive_skb_one_core+0x168/0x1b0\n   process_backlog+0x384/0x1100\n   __napi_poll.constprop.0+0xa1/0x370\n   net_rx_action+0x925/0xe50\n\nThe above can happen following a sequence of events when using\nOpenVSwitch, when an OVS_ACTION_ATTR_USERSPACE action precedes an\nOVS_ACTION_ATTR_OUTPUT action:\n\n1. OVS_ACTION_ATTR_USERSPACE is handled (in do_execute_actions): the skb\n   goes through queue_gso_packets and then __udp_gso_segment, where its\n   destructor is removed.\n2. The segments' data are copied and sent to userspace.\n3. OVS_ACTION_ATTR_OUTPUT is handled (in do_execute_actions) and the\n   same original skb is sent to its path.\n4. If it later hits skb_orphan, we hit the bug.\n\nFix this by also removing the reference to the socket in\n__udp_gso_segment.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "ad405857b174ed31a97982bb129c320d03321cf5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9f28205ddb76e86cac418332e952241d85fed0dc"
            },
            {
              "version": "ad405857b174ed31a97982bb129c320d03321cf5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a2d1cca955ed34873e524cc2e6e885450d262f05"
            },
            {
              "version": "ad405857b174ed31a97982bb129c320d03321cf5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "455217ac9db0cf9349b3933664355e907bb1a569"
            },
            {
              "version": "ad405857b174ed31a97982bb129c320d03321cf5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e8db70537878e1bb3fd83e5abcc6feefc0587828"
            },
            {
              "version": "ad405857b174ed31a97982bb129c320d03321cf5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "01a83237644d6822bc7df2c5564fc81b0df84358"
            },
            {
              "version": "ad405857b174ed31a97982bb129c320d03321cf5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "084819b0d8b1bd433b90142371eb9450d657f8ca"
            },
            {
              "version": "ad405857b174ed31a97982bb129c320d03321cf5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c32da44cc9298eaa6109e3fc2c2b4e07cc4bf11b"
            },
            {
              "version": "ad405857b174ed31a97982bb129c320d03321cf5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ee01b2f2d7d0010787c2343463965bbc283a497f"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.18",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.18"
            },
            {
              "version": "5.4.291",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.235",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.179",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.131",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.83",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.19",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.13.7",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.13.*"
            },
            {
              "version": "6.14",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}