CVE-2024-53189 Information

Description

In the Linux kernel the following vulnerability has been resolved:

wifi: nl80211: fix bounds checker error in nl80211_parse_sched_scan

The channels array in the cfg80211_scan_request has a __counted_by attribute attached to it which points to the n_channels variable. This attribute is used in bounds checking and if it is not set before the array is filled then the bounds sanitizer will issue a warning or a kernel panic if CONFIG_UBSAN_TRAP is set.

This patch sets the size of allocated memory as the initial value for n_channels. It is updated with the actual number of added elements after the array is filled.

Reference

https://git.kernel.org/stable/c/1a7b62ddf2c7642878c24f0e556041bb58c37527 https://git.kernel.org/stable/c/9c46a3a5b394d6d123866aa44436fc2cd342eb0d https://git.kernel.org/stable/c/d4ef643ea78c59c22546046c25dc6e7206267672