#VU96358 Improper locking in Linux kernel - CVE-2022-48887

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the vmw_execbuf_rcache_update(), vmw_execbuf_res_noref_val_add(), vmw_view_res_val_add(), vmw_resource_context_res_add(), vmw_cmd_res_check(), vmw_translate_mob_ptr(), vmw_translate_guest_ptr(), vmw_cmd_set_shader(), vmw_cmd_dx_set_shader(), vmw_cmd_dx_bind_shader(), vmw_cmd_dx_bind_streamoutput(), vmw_cmd_dx_set_streamoutput() and vmw_execbuf_tie_context() functions in drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c, within the vmw_user_bo_lookup() function in drivers/gpu/drm/vmwgfx/vmwgfx_bo.c, within the ttm_base_object_unref() and ttm_base_object_lookup() functions in drivers/gpu/drm/vmwgfx/ttm_object.c. A local user can perform a denial of service (DoS) attack.

Remediation

External links

• https://git.kernel.org/stable/c/7ac9578e45b20e3f3c0c8eb71f5417a499a7226a
• https://git.kernel.org/stable/c/a309c7194e8a2f8bd4539b9449917913f6c2cd50
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.7
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2