CVE-2022-49968: Linux Kernel

Medium severity, CVSS 4.7. EPSS: 0.3% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: ieee802154/adf7242: defer destroy_workqueue call There is a possible race condition (use-after-free) like below (FREE) | (USE) adf7242_remove | adf7242_channel cancel_delayed_work_sync | destroy_workqueue (1) | adf7242_cmd_rx | mod_delayed_work (2) | The root cause for this race is that the upper layer (ieee802154) is unaware of this detaching event and the function adf7242_channel can be called without any checks. To fix this, we can add a flag write at the beginning of adf7242_remove and add flag check in adf7242_channel. Or we can just defer the destructive operation like other commit 3e0588c291d6 ("hamradio: defer ax25 kfree after unregister_netdev") which let the ieee802154_unregister_hw() to handle the synchronization. This patch takes the second option. runs")

Affected products

• Linux Linux Kernel: from 4.17.19, before 4.18 (fixed in 4.18); from 4.18.1, before 4.19.258 (fixed in 4.19.258); from 4.20, before 5.4.213 (fixed in 5.4.213); from 5.5, before 5.10.142 (fixed in 5.10.142); from 5.11, before 5.15.66 (fixed in 5.15.66); from 5.16, before 5.19.8 (fixed in 5.19.8); …

Published 2025-06-18. Last modified 2026-08-04.