{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-98881",
  "modified": "2026-10-24T04:30:01Z",
  "upstream": [
    "CVE-2026-98881"
  ],
  "published": "2026-10-23T11:38:26Z",
  "summary": "net: bridge: remove stale rcu_barrier() in br_multicast_dev_del()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bridge: remove stale rcu_barrier() in br_multicast_dev_del()\n\nThis rcu_barrier() came from a time call_rcu() calls were used in\nnet/bridge/br_multicast.c.\n\nNow kfree_rcu() is there, we can remove this problematic rcu_barrier()\nwhich causes extreme RTNL pressure in many syzbot reports.\n\nINFO: task syz-executor:77945 is blocked on a mutex likely owned by task kworker/u1024:5:36537.\ntask:kworker/u1024:5 state:D stack:24616 pid:36537 tgid:36537 ppid:2      task_flags:0x4208060 flags:0x00080000 last_sleep:612797637337\nWorkqueue: netns cleanup_net\nCall Trace:\n <TASK>\n  [<ffffffff81914eaa>] context_switch+0xf2a/0x1730 kernel/sched/core.c:6483\n  [<ffffffff81201143>] __schedule+0x1133/0x43a0 kernel/sched/core.c:8411\n  [<ffffffff8120446b>] __schedule_loop kernel/sched/core.c:8514 [inline]\n  [<ffffffff8120446b>] schedule+0xab/0x260 kernel/sched/core.c:8529\n  [<ffffffff8121a093>] schedule_timeout+0xc3/0x2b0 kernel/time/sleep_timeout.c:75\n  [<ffffffff81205347>] do_wait_for_common kernel/sched/completion.c:100 [inline]\n  [<ffffffff81205347>] __wait_for_common kernel/sched/completion.c:121 [inline]\n  [<ffffffff81205347>] wait_for_common kernel/sched/completion.c:132 [inline]\n  [<ffffffff81205347>] wait_for_completion+0x2c7/0x5d0 kernel/sched/completion.c:153\n  [<ffffffff81b8f27f>] rcu_barrier+0x49f/0x620 kernel/rcu/tree.c:3888\n  [<ffffffff860091b3>] br_multicast_dev_del+0x303/0x350 net/bridge/br_multicast.c:4459\n  [<ffffffff85fb5dbc>] br_dev_uninit+0x1c/0x40 net/bridge/br_device.c:157\n  [<ffffffff8568058c>] unregister_netdevice_many_notify+0x1c1c/0x2300 net/core/dev.c:12599\n  [<ffffffff8562be43>] ops_exit_rtnl_list net/core/net_namespace.c:187 [inline]\n  [<ffffffff8562be43>] ops_undo_list+0x3d3/0x940 net/core/net_namespace.c:248",
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