IT

Tracker / CVE-2025-21909

CVE-2025-21909

Medium 5.5

In the Linux kernel, the following vulnerability has been resolved: wifi: nl80211: reject cooked mode if it is set along with other flags It is possible to set both MONITOR_FLAG_COOK_FRAMES and MONITOR_FLAG_ACTIVE flags simultaneously on the same monitor interface from the userspace. This causes a sub-interface to be created with no IEEE80211_SDATA_IN_DRIVER bit set because the monitor interface is in the cooked state and it takes precedence over all other states. When the interface is then being deleted the kernel calls WARN_ONCE() from check_sdata_in_driver() because of missing that bit. Fix this by rejecting MONITOR_FLAG_COOK_FRAMES if it is set along with other flags. Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

Affected products and versions

linux linux_kernel
linux linux_kernel · 2.6.26 → 5.4.291
linux linux_kernel · 5.11 → 5.15.179
linux linux_kernel · 5.16 → 6.1.131
linux linux_kernel · 5.5 → 5.10.235
linux linux_kernel · 6.13 → 6.13.7
linux linux_kernel · 6.2 → 6.6.83
linux linux_kernel · 6.7 → 6.12.19

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References