{
  "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-2023-52991",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2023-52991",
    "idYear": 2023,
    "status": "PUBLISHED",
    "publishedAt": "2025-03-27T16:43:26.991Z",
    "updatedAt": "2026-08-05T09:12:18.633Z",
    "importedAt": "2026-10-24T01:57:03.413Z",
    "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: fix NULL pointer in skb_segment_list",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: fix NULL pointer in skb_segment_list\n\nCommit 3a1296a38d0c (\"net: Support GRO/GSO fraglist chaining.\")\nintroduced UDP listifyed GRO. The segmentation relies on frag_list being\nuntouched when passing through the network stack. This assumption can be\nbroken sometimes, where frag_list itself gets pulled into linear area,\nleaving frag_list being NULL. When this happens it can trigger\nfollowing NULL pointer dereference, and panic the kernel. Reverse the\ntest condition should fix it.\n\n[19185.577801][    C1] BUG: kernel NULL pointer dereference, address:\n...\n[19185.663775][    C1] RIP: 0010:skb_segment_list+0x1cc/0x390\n...\n[19185.834644][    C1] Call Trace:\n[19185.841730][    C1]  <TASK>\n[19185.848563][    C1]  __udp_gso_segment+0x33e/0x510\n[19185.857370][    C1]  inet_gso_segment+0x15b/0x3e0\n[19185.866059][    C1]  skb_mac_gso_segment+0x97/0x110\n[19185.874939][    C1]  __skb_gso_segment+0xb2/0x160\n[19185.883646][    C1]  udp_queue_rcv_skb+0xc3/0x1d0\n[19185.892319][    C1]  udp_unicast_rcv_skb+0x75/0x90\n[19185.900979][    C1]  ip_protocol_deliver_rcu+0xd2/0x200\n[19185.910003][    C1]  ip_local_deliver_finish+0x44/0x60\n[19185.918757][    C1]  __netif_receive_skb_one_core+0x8b/0xa0\n[19185.927834][    C1]  process_backlog+0x88/0x130\n[19185.935840][    C1]  __napi_poll+0x27/0x150\n[19185.943447][    C1]  net_rx_action+0x27e/0x5f0\n[19185.951331][    C1]  ? mlx5_cq_tasklet_cb+0x70/0x160 [mlx5_core]\n[19185.960848][    C1]  __do_softirq+0xbc/0x25d\n[19185.968607][    C1]  irq_exit_rcu+0x83/0xb0\n[19185.976247][    C1]  common_interrupt+0x43/0xa0\n[19185.984235][    C1]  asm_common_interrupt+0x22/0x40\n...\n[19186.094106][    C1]  </TASK>",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "3a1296a38d0cf62bffb9a03c585cbd5dbf15d596",
              "status": "affected",
              "versionType": "git",
              "lessThan": "6446369fb9f083ce032448c5047da08e298b22e6"
            },
            {
              "version": "3a1296a38d0cf62bffb9a03c585cbd5dbf15d596",
              "status": "affected",
              "versionType": "git",
              "lessThan": "046de74f9af92ae9ffce75fa22a1795223f4fb54"
            },
            {
              "version": "3a1296a38d0cf62bffb9a03c585cbd5dbf15d596",
              "status": "affected",
              "versionType": "git",
              "lessThan": "888dad6f3e85e3b2f8389bd6478f181efc72534d"
            },
            {
              "version": "3a1296a38d0cf62bffb9a03c585cbd5dbf15d596",
              "status": "affected",
              "versionType": "git",
              "lessThan": "876e8ca8366735a604bac86ff7e2732fc9d85d2d"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.6",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.6"
            },
            {
              "version": "5.10.167",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.92",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.10",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}