CVE-2026-31546

취약점 유형

In the Linux kernel, the following vulnerability has been resolved: net: bonding: fix NULL deref in bond_debug_rlb_hash_show rlb_clear_slave intentionally keeps RLB hash-table entries on the rx_hashtbl_used_head list with slave set to NULL when no replacement slave is available. However, bond_debug_rlb_hash_show visites client_info->slave without checking if it's NULL. Other used-list iterators in bond_alb.c already handle this NULL-slave state safely: - rlb_update_client returns early on !client_info->slave - rlb_req_update_slave_clients, rlb_clear_slave, and rlb_rebalance compare slave values before visiting - lb_req_update_subnet_clients continues if slave is NULL The following NULL deref crash can be trigger in bond_debug_rlb_hash_show: [ 1.289791] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 1.292058] RIP: 0010:bond_debug_rlb_hash_show (drivers/net/bonding/bond_debugfs.c:41) [ 1.293101] RSP: 0018:ffffc900004a7d00 EFLAGS: 00010286 [ 1.293333] RAX: 0000000000000000 RBX: ffff888102b48200 RCX: ffff888102b48204 [ 1.293631] RDX: ffff888102b48200 RSI: ffffffff839daad5 RDI: ffff888102815078 [ 1.293924] RBP: ffff888102815078 R08: ffff888102b4820e R09: 0000000000000

영향받는 제품

• linux linux_kernel

참고 자료

• https://git.kernel.org/stable/c/017d674cf6930e9586a29ee808c7ca09d1396d07
• https://git.kernel.org/stable/c/0a3f8cd3f370247ded14d38d216b49dd30eade76
• https://git.kernel.org/stable/c/19f0fd87df0e5746b24f5caa465a66a8c6e6e241
• https://git.kernel.org/stable/c/2ec2c777f357a83c3d503d8d9370c90b60f0ae63
• https://git.kernel.org/stable/c/605b52497bf89b3b154674deb135da98f916e390
• https://git.kernel.org/stable/c/6a3bb74e25d79cbb15f67ef80f71e2b2bfe27ff4