CVE-2025-21790 in Linux
Tóm tắt
Bởi VulDB • 31/05/2026
Trong kernel Linux, lỗ hổng sau đây đã được khắc phục:
vxlan: kiểm tra giá trị trả về của vxlan_vnigroup_init()
vxlan_init() phải kiểm tra xem vxlan_vnigroup_init() có thành công hay không, nếu không sẽ xảy ra lỗi crash sau đó, do syzbot phát hiện.
Oops: general protection fault, có thể do địa chỉ không hợp lệ (non-canonical address) 0xdffffc000000002c: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref trong phạm vi [0x0000000000000160-0x0000000000000167]
CPU: 0 UID: 0 PID: 7313 Comm: syz-executor147 Not tainted 6.14.0-rc1-syzkaller-00276-g69b54314c975 #0 Tên phần cứng: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:vxlan_vnigroup_uninit+0x89/0x500 drivers/net/vxlan/vxlan_vnifilter.c:912 Code: 00 48 8b 44 24 08 4c 8b b0 98 41 00 00 48 89 44 24 18 48 89 54 24 10 48 89 74 24 08 48 89 7c 24 00 48 8b 44 24 08 4c 8b b0 98 41 00 00 <48> 8b 00 48 89 44 24 18 48 89 54 24 10 48 89 74 24 08 48 89 7c 24 RSP: 0018:ffffc90003997d30 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff8880461b0d80 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880461b0d80 RBP: ffffc90003997d60 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880461b0d80 R14: 0000000000000000 R15: dffffc0000000000 FS: 00007fecfa95d6c0(0000) GS:ffff88806a600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fecfa95cfb8 CR3: 000000004472c000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vxlan_uninit+0x1ab/0x200 drivers/net/vxlan/vxlan_core.c:2942 unregister_netdevice_many_notify+0x12d6/0x1f30 net/core/dev.c:11824 unregister_netdevice_many net/core/dev.c:11866 [inline]
unregister_netdevice_queue+0x307/0x3f0 net/core/dev.c:11736 register_netdevice+0x1829/0x1eb0 net/core/dev.c:10901 __vxlan_dev_create+0x7c6/0xa30 drivers/net/vxlan/vxlan_core.c:3981 vxlan_newlink+0xd1/0x130 drivers/net/vxlan/vxlan_core.c:4407 rtnl_newlink_create net/core/rtnetlink.c:3795 [inline]
__rtnl_newlink net/core/r
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