{
  "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-2026-31517",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-31517",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-04-22T13:54:33.522Z",
    "updatedAt": "2026-05-11T22:10:19.646Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "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": "xfrm: iptfs: fix skb_put() panic on non-linear skb during reassembly",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: iptfs: fix skb_put() panic on non-linear skb during reassembly\n\nIn iptfs_reassem_cont(), IP-TFS attempts to append data to the new inner\npacket 'newskb' that is being reassembled. First a zero-copy approach is\ntried if it succeeds then newskb becomes non-linear.\n\nWhen a subsequent fragment in the same datagram does not meet the\nfast-path conditions, a memory copy is performed. It calls skb_put() to\nappend the data and as newskb is non-linear it triggers\nSKB_LINEAR_ASSERT check.\n\n Oops: invalid opcode: 0000 [#1] SMP NOPTI\n [...]\n RIP: 0010:skb_put+0x3c/0x40\n [...]\n Call Trace:\n  <IRQ>\n  iptfs_reassem_cont+0x1ab/0x5e0 [xfrm_iptfs]\n  iptfs_input_ordered+0x2af/0x380 [xfrm_iptfs]\n  iptfs_input+0x122/0x3e0 [xfrm_iptfs]\n  xfrm_input+0x91e/0x1a50\n  xfrm4_esp_rcv+0x3a/0x110\n  ip_protocol_deliver_rcu+0x1d7/0x1f0\n  ip_local_deliver_finish+0xbe/0x1e0\n  __netif_receive_skb_core.constprop.0+0xb56/0x1120\n  __netif_receive_skb_list_core+0x133/0x2b0\n  netif_receive_skb_list_internal+0x1ff/0x3f0\n  napi_complete_done+0x81/0x220\n  virtnet_poll+0x9d6/0x116e [virtio_net]\n  __napi_poll.constprop.0+0x2b/0x270\n  net_rx_action+0x162/0x360\n  handle_softirqs+0xdc/0x510\n  __irq_exit_rcu+0xe7/0x110\n  irq_exit_rcu+0xe/0x20\n  common_interrupt+0x85/0xa0\n  </IRQ>\n  <TASK>\n\nFix this by checking if the skb is non-linear. If it is, linearize it by\ncalling skb_linearize(). As the initial allocation of newskb originally\nreserved enough tailroom for the entire reassembled packet we do not\nneed to check if we have enough tailroom or extend it.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "5f2b6a9095743a6bf1f34c43c4fe78fa8bdf5ad7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "33a7b36268933c75bdc355e5531951e0ea9f1951"
            },
            {
              "version": "5f2b6a9095743a6bf1f34c43c4fe78fa8bdf5ad7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7fdfe8f6efeb0e1200e22a903f2471539f54522b"
            },
            {
              "version": "5f2b6a9095743a6bf1f34c43c4fe78fa8bdf5ad7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "0b352f83cabfefdaafa806d6471f0eca117dc7d5"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.14",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.14"
            },
            {
              "version": "6.18.21",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}