CVE-2022-50829
wifi: ath9k: hif_usb: Fix use-after-free in ath9k_hif_usb_reg_in_cb()
Vexday Risk Score
3Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
30 Dec 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
In the Linux kernel, the following vulnerability has been resolved:
wifi: ath9k: hif_usb: Fix use-after-free in ath9k_hif_usb_reg_in_cb()
It is possible that skb is freed in ath9k_htc_rx_msg(), then
usb_submit_urb() fails and we try to free skb again. It causes
use-after-free bug. Moreover, if alloc_skb() fails, urb->context becomes
NULL but rx_buf is not freed and there can be a memory leak.
The patch removes unnecessary nskb and makes skb processing more clear: it
is supposed that ath9k_htc_rx_msg() either frees old skb or passes its
managing to another callback function.
Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/0c8dd2ea4b419da96ab4953e4967e9363e2f8a4fhttps://git.kernel.org/stable/c/355f16f756aad0c95cdaa0c14a34ab4137d32815https://git.kernel.org/stable/c/53b9bb1a00c4285ee7f58a11129dbea015db61bchttps://git.kernel.org/stable/c/5e8751a977a49a6e00cce1a8da5ca16da83f9c8chttps://git.kernel.org/stable/c/71fc0ad671a62c494d2aec731baeabd3bfe6c95dhttps://git.kernel.org/stable/c/988bd27de2484faf17afe0408db2e3d9e5ac61fchttps://git.kernel.org/stable/c/98d9172822dc6f38138333941984bd759a89d419https://git.kernel.org/stable/c/dd95f2239fc846795fc926787c3ae0ca701c9840https://git.kernel.org/stable/c/f127c2b4c967025e5c3a4ce7e13b79135d46a33d