CVE-2025-71291

In the Linux kernel, the following vulnerability has been resolved:

misc: bcm_vk: Fix possible null-pointer dereferences in bcm_vk_read()

In the function bcm_vk_read(), the pointer entry is checked, indicating

that it can be NULL. If entry is NULL and rc is set to -EMSGSIZE, the

following code may cause null-pointer dereferences:

struct vk_msg_blk tmp_msg = entry->to_h_msg[0];

set_msg_id(&tmp_msg, entry->usr_msg_id);

tmp_msg.size = entry->to_h_blks - 1;

To prevent these possible null-pointer dereferences, copy to_h_msg,

usr_msg_id, and to_h_blks from iter into temporary variables, and return

these temporary variables to the application instead of accessing them

through a potentially NULL entry.