CVE-2025-38013

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> wifi: mac80211: Set n_channels after allocating struct cfg80211_scan_request<br /> <br /> Make sure that n_channels is set after allocating the<br /> struct cfg80211_registered_device::int_scan_req member. Seen with<br /> syzkaller:<br /> <br /> UBSAN: array-index-out-of-bounds in net/mac80211/scan.c:1208:5<br /> index 0 is out of range for type &amp;#39;struct ieee80211_channel *[] __counted_by(n_channels)&amp;#39; (aka &amp;#39;struct ieee80211_channel *[]&amp;#39;)<br /> <br /> This was missed in the initial conversions because I failed to locate<br /> the allocation likely due to the "sizeof(void *)" not matching the<br /> "channels" array type.