CVE-2025-38109

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> net/mlx5: Fix ECVF vports unload on shutdown flow<br /> <br /> Fix shutdown flow UAF when a virtual function is created on the embedded<br /> chip (ECVF) of a BlueField device. In such case the vport acl ingress<br /> table is not properly destroyed.<br /> <br /> ECVF functionality is independent of ecpf_vport_exists capability and<br /> thus functions mlx5_eswitch_(enable|disable)_pf_vf_vports() should not<br /> test it when enabling/disabling ECVF vports.<br /> <br /> kernel log:<br /> [] refcount_t: underflow; use-after-free.<br /> [] WARNING: CPU: 3 PID: 1 at lib/refcount.c:28<br /> refcount_warn_saturate+0x124/0x220<br /> ----------------<br /> [] Call trace:<br /> [] refcount_warn_saturate+0x124/0x220<br /> [] tree_put_node+0x164/0x1e0 [mlx5_core]<br /> [] mlx5_destroy_flow_table+0x98/0x2c0 [mlx5_core]<br /> [] esw_acl_ingress_table_destroy+0x28/0x40 [mlx5_core]<br /> [] esw_acl_ingress_lgcy_cleanup+0x80/0xf4 [mlx5_core]<br /> [] esw_legacy_vport_acl_cleanup+0x44/0x60 [mlx5_core]<br /> [] esw_vport_cleanup+0x64/0x90 [mlx5_core]<br /> [] mlx5_esw_vport_disable+0xc0/0x1d0 [mlx5_core]<br /> [] mlx5_eswitch_unload_ec_vf_vports+0xcc/0x150 [mlx5_core]<br /> [] mlx5_eswitch_disable_sriov+0x198/0x2a0 [mlx5_core]<br /> [] mlx5_device_disable_sriov+0xb8/0x1e0 [mlx5_core]<br /> [] mlx5_sriov_detach+0x40/0x50 [mlx5_core]<br /> [] mlx5_unload+0x40/0xc4 [mlx5_core]<br /> [] mlx5_unload_one_devl_locked+0x6c/0xe4 [mlx5_core]<br /> [] mlx5_unload_one+0x3c/0x60 [mlx5_core]<br /> [] shutdown+0x7c/0xa4 [mlx5_core]<br /> [] pci_device_shutdown+0x3c/0xa0<br /> [] device_shutdown+0x170/0x340<br /> [] __do_sys_reboot+0x1f4/0x2a0<br /> [] __arm64_sys_reboot+0x2c/0x40<br /> [] invoke_syscall+0x78/0x100<br /> [] el0_svc_common.constprop.0+0x54/0x184<br /> [] do_el0_svc+0x30/0xac<br /> [] el0_svc+0x48/0x160<br /> [] el0t_64_sync_handler+0xa4/0x12c<br /> [] el0t_64_sync+0x1a4/0x1a8<br /> [] --[ end trace 9c4601d68c70030e ]---