netfilter: nfnetlink_queue: acquire rcu_read_lock() in instance_destroy_rcu()

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: acquire rcu_read_lock() in instance_destroy_rcu() syzbot reported that nf_reinject() could be called without rcu_read_lock() : WARNING: suspicious RCU usage 6.9.0-rc7-syzkaller-02060-g5c1672705a1a #0 Not tainted net/netfilter/nfnetlink_queue.c:263 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 2 locks held by syz-executor.4/13427: #0: ffffffff8e334f60 (rcu_callback){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline] #0: ffffffff8e334f60 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2190 [inline] #0: ffffffff8e334f60 (rcu_callback){....}-{0:0}, at: rcu_core+0xa86/0x1830 kernel/rcu/tree.c:2471 #1: ffff88801ca92958 (&inst->lock){+.-.}-{2:2}, at: spin_lock_bh include/linux/spinlock.h:356 [inline] #1: ffff88801ca92958 (&inst->lock){+.-.}-{2:2}, at: nfqnl_flush net/netfilter/nfnetlink_queue.c:405 [inline] #1: ffff88801ca92958 (&inst->lock){+.-.}-{2:2}, at: instance_destroy_rcu+0x30/0x220 net/netfilter/nfnetlink_queue.c:172 stack backtrace: CPU: 0 PID: 13427 Comm: syz-executor.4 Not tainted 6.9.0-rc7-syzkaller-02060-g5c1672705a1a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 lockdep_rcu_suspicious+0x221/0x340 kernel/locking/lockdep.c:6712 nf_reinject net/netfilter/nfnetlink_queue.c:323 [inline] nfqnl_reinject+0x6ec/0x1120 net/netfilter/nfnetlink_queue.c:397 nfqnl_flush net/netfilter/nfnetlink_queue.c:410 [inline] instance_destroy_rcu+0x1ae/0x220 net/netfilter/nfnetlink_queue.c:172 rcu_do_batch kernel/rcu/tree.c:2196 [inline] rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2471 handle_softirqs+0x2d6/0x990 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 </IRQ> <TASK>

Timeline

1. Jun 21, 2024, 10:18 AM UTCCVE published
2. Sep 10, 2024, 5:09 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Oct 15, 2026, 12:42 AM UTCRecord last updated

Affected versions

• Linux Linux

  From 9872bec773c2e8503fec480c1e8a0c732517e257 · fixed in 8658bd777cbfcb0c13df23d0ea120e70517761b9; From 9872bec773c2e8503fec480c1e8a0c732517e257 · fixed in 3989b817857f4890fab9379221a9d3f52bf5c256; From 9872bec773c2e8503fec480c1e8a0c732517e257 · fixed in e01065b339e323b3dfa1be217fd89e9b3208b0ab; From 9872bec773c2e8503fec480c1e8a0c732517e257 · fixed in 25ea5377e3d2921a0f96ae2551f5ab1b36825dd4; From 9872bec773c2e8503fec480c1e8a0c732517e257 · fixed in 68f40354a3851df46c27be96b84f11ae193e36c5; From 9872bec773c2e8503fec480c1e8a0c732517e257 · fixed in 8f365564af898819a523f1a8cf5c6ce053e9f718; From 9872bec773c2e8503fec480c1e8a0c732517e257 · fixed in 215df6490e208bfdd5b3012f5075e7f8736f3e7a; From 9872bec773c2e8503fec480c1e8a0c732517e257 · fixed in dc21c6cc3d6986d938efbf95de62473982c98dec

• Linux Linux

  2.6.25

• KernelLinux

  From 2.6.25 · fixed in 4.19.316; From 4.20.0 · fixed in 5.4.278; From 5.5.0 · fixed in 5.10.219; From 5.11.0 · fixed in 5.15.161; From 5.16.0 · fixed in 6.1.93; From 6.2.0 · fixed in 6.6.33; From 6.7.0 · fixed in 6.9.4

References 8