{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "11eeef41d5f63c7d2f7fdfcc733eb7fb137cc384"
            },
            {
              "fixed": "cb833bbc1b3c51e08652d3c86298307c07d3f2db"
            },
            {
              "fixed": "26900306a5a2c3e4f75c643a064525526bb6e5f3"
            },
            {
              "fixed": "0694618cf3e9b120666e31f5f383a6e466d95a0d"
            },
            {
              "fixed": "8def8fbd23f40e945febe913d04b731012ce0082"
            },
            {
              "fixed": "c55940895245d8ef658ab381248a28755218d625"
            },
            {
              "fixed": "fb965b1cfe92b28d28b5ebe3116b81dbef9f2d2f"
            },
            {
              "fixed": "9a05e195618a6d474f2bcd5b6376d0ffc2f00366"
            },
            {
              "fixed": "2195574dc6d9017d32ac346987e12659f931d932"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.6.31"
            },
            {
              "fixed": "5.10.258"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.209"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.175"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.141"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.91"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.33"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.0.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45841.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_osf: fix divide-by-zero in OSF_WSS_MODULO\n\nnf_osf_match_one() computes ctx-\u003ewindow % f-\u003ewss.val in the\nOSF_WSS_MODULO branch with no guard for f-\u003ewss.val == 0. A\nCAP_NET_ADMIN user can add such a fingerprint via nfnetlink; a\nsubsequent matching TCP SYN divides by zero and panics the kernel.\n\nReject the bogus fingerprint in nfnl_osf_add_callback() above the\nper-option for-loop. f-\u003ewss is per-fingerprint, not per-option, so\nthe check must run regardless of f-\u003eopt_num (including 0). Also\nreject wss.wc \u003e= OSF_WSS_MAX; nf_osf_match_one() already treats that\nas \"should not happen\".\n\nCrash:\n Oops: divide error: 0000 [#1] SMP KASAN NOPTI\n RIP: 0010:nf_osf_match_one (net/netfilter/nfnetlink_osf.c:98)\n Call Trace:\n \u003cIRQ\u003e\n  nf_osf_match (net/netfilter/nfnetlink_osf.c:220)\n  xt_osf_match_packet (net/netfilter/xt_osf.c:32)\n  ipt_do_table (net/ipv4/netfilter/ip_tables.c:348)\n  nf_hook_slow (net/netfilter/core.c:622)\n  ip_local_deliver (net/ipv4/ip_input.c:265)\n  ip_rcv (include/linux/skbuff.h:1162)\n  __netif_receive_skb_one_core (net/core/dev.c:6181)\n  process_backlog (net/core/dev.c:6642)\n  __napi_poll (net/core/dev.c:7710)\n  net_rx_action (net/core/dev.c:7945)\n  handle_softirqs (kernel/softirq.c:622)",
  "id": "CVE-2026-45841",
  "modified": "2026-07-15T01:49:08.397165799Z",
  "published": "2026-05-27T09:24:40.805Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0694618cf3e9b120666e31f5f383a6e466d95a0d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2195574dc6d9017d32ac346987e12659f931d932"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/26900306a5a2c3e4f75c643a064525526bb6e5f3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8def8fbd23f40e945febe913d04b731012ce0082"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9a05e195618a6d474f2bcd5b6376d0ffc2f00366"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c55940895245d8ef658ab381248a28755218d625"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cb833bbc1b3c51e08652d3c86298307c07d3f2db"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fb965b1cfe92b28d28b5ebe3116b81dbef9f2d2f"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45841.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-45841"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.8.0",
  "summary": "netfilter: nfnetlink_osf: fix divide-by-zero in OSF_WSS_MODULO"
}