{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.176-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.94-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.0.10-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  netfilter: nfnetlink_osf: fix divide-by-zero in OSF_WSS_MODULO  nf_osf_match_one() computes ctx-\u003ewindow % f-\u003ewss.val in the OSF_WSS_MODULO branch with no guard for f-\u003ewss.val == 0. A CAP_NET_ADMIN user can add such a fingerprint via nfnetlink; a subsequent matching TCP SYN divides by zero and panics the kernel.  Reject the bogus fingerprint in nfnl_osf_add_callback() above the per-option for-loop. f-\u003ewss is per-fingerprint, not per-option, so the check must run regardless of f-\u003eopt_num (including 0). Also reject wss.wc \u003e= OSF_WSS_MAX; nf_osf_match_one() already treats that as \"should not happen\".  Crash:  Oops: divide error: 0000 [#1] SMP KASAN NOPTI  RIP: 0010:nf_osf_match_one (net/netfilter/nfnetlink_osf.c:98)  Call Trace:  \u003cIRQ\u003e   nf_osf_match (net/netfilter/nfnetlink_osf.c:220)   xt_osf_match_packet (net/netfilter/xt_osf.c:32)   ipt_do_table (net/ipv4/netfilter/ip_tables.c:348)   nf_hook_slow (net/netfilter/core.c:622)   ip_local_deliver (net/ipv4/ip_input.c:265)   ip_rcv (include/linux/skbuff.h:1162)   __netif_receive_skb_one_core (net/core/dev.c:6181)   process_backlog (net/core/dev.c:6642)   __napi_poll (net/core/dev.c:7710)   net_rx_action (net/core/dev.c:7945)   handle_softirqs (kernel/softirq.c:622)",
  "id": "DEBIAN-CVE-2026-45841",
  "modified": "2026-09-09T08:47:30.368932881Z",
  "published": "2026-05-27T11:16:23.493Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-45841"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-45841"
  ]
}