{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.2.9-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  netfilter: ip6t_rpfilter: reject routes without inet6_dev  ip6_route_lookup() can return an error-free route whose rt6i_idev is NULL. Lowering an external nexthop device's MTU below IPV6_MIN_MTU tears down its inet6_dev while fib6_ifdown() leaves routes using nexthop objects in the FIB. An unprivileged user can construct this state with rtnetlink in a private user and network namespace, then trigger a NULL dereference through an IPv6 rpfilter lookup:    Oops: general protection fault, probably for non-canonical address   0xdffffc0000000000   KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]   RIP: rpfilter_mt (net/ipv6/netfilter/ip6t_rpfilter.c:75)   Call Trace:   ip6t_do_table (net/ipv6/netfilter/ip6_tables.c:316)   nf_hook_slow (net/netfilter/core.c:619)   ipv6_rcv (net/ipv6/ip6_input.c:351)   __netif_receive_skb_one_core (net/core/dev.c:6216)   process_backlog (net/core/dev.c:6680)   __napi_poll (net/core/dev.c:7739)   net_rx_action (net/core/dev.c:7959)   handle_softirqs (kernel/softirq.c:622)   do_softirq.part.0 (kernel/softirq.c:523)   __local_bh_enable_ip (kernel/softirq.c:450)   __dev_queue_xmit (net/core/dev.c:4913)   packet_sendmsg (net/packet/af_packet.c:3139)   __sys_sendto (net/socket.c:2252)   __x64_sys_sendto (net/socket.c:2259)   do_syscall_64 (arch/x86/entry/syscall_64.c:94)   entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)   Kernel panic - not syncing: Fatal exception in interrupt  Reject routes without an inet6_dev immediately after lookup. Such routes are not eligible for reverse-path filtering, and the check protects all later rt6i_idev dereferences.",
  "id": "DEBIAN-CVE-2026-98379",
  "modified": "2026-10-10T04:47:32.528817614Z",
  "published": "2026-10-09T08:16:56.250Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-98379"
    }
  ],
  "upstream": [
    "CVE-2026-98379"
  ]
}