CVE-2024-36281

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> net/mlx5: Use mlx5_ipsec_rx_status_destroy to correctly delete status rules<br /> <br /> rx_create no longer allocates a modify_hdr instance that needs to be<br /> cleaned up. The mlx5_modify_header_dealloc call will lead to a NULL pointer<br /> dereference. A leak in the rules also previously occurred since there are<br /> now two rules populated related to status.<br /> <br /> BUG: kernel NULL pointer dereference, address: 0000000000000000<br /> #PF: supervisor read access in kernel mode<br /> #PF: error_code(0x0000) - not-present page<br /> PGD 109907067 P4D 109907067 PUD 116890067 PMD 0<br /> Oops: 0000 [#1] SMP<br /> CPU: 1 PID: 484 Comm: ip Not tainted 6.9.0-rc2-rrameshbabu+ #254<br /> Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS Arch Linux 1.16.3-1-1 04/01/2014<br /> RIP: 0010:mlx5_modify_header_dealloc+0xd/0x70<br /> <br /> Call Trace:<br /> <br /> ? show_regs+0x60/0x70<br /> ? __die+0x24/0x70<br /> ? page_fault_oops+0x15f/0x430<br /> ? free_to_partial_list.constprop.0+0x79/0x150<br /> ? do_user_addr_fault+0x2c9/0x5c0<br /> ? exc_page_fault+0x63/0x110<br /> ? asm_exc_page_fault+0x27/0x30<br /> ? mlx5_modify_header_dealloc+0xd/0x70<br /> rx_create+0x374/0x590<br /> rx_add_rule+0x3ad/0x500<br /> ? rx_add_rule+0x3ad/0x500<br /> ? mlx5_cmd_exec+0x2c/0x40<br /> ? mlx5_create_ipsec_obj+0xd6/0x200<br /> mlx5e_accel_ipsec_fs_add_rule+0x31/0xf0<br /> mlx5e_xfrm_add_state+0x426/0xc00<br />