CVE-2022-50179
Description
In the Linux kernel, the following vulnerability has been resolved: ath9k: fix use-after-free in ath9k_hif_usb_rx_cb Syzbot reported use-after-free Read in ath9k_hif_usb_rx_cb() [0]. The problem was in incorrect htc_handle->drv_priv initialization. Probable call trace which can trigger use-after-free: ath9k_htc_probe_device() /* htc_handle->drv_priv = priv; */ ath9k_htc_wait_for_target() <--- Failed ieee80211_free_hw() <--- priv pointer is freed <IRQ> ... ath9k_hif_usb_rx_cb() ath9k_hif_usb_rx_stream() RX_STAT_INC() <--- htc_handle->drv_priv access In order to not add fancy protection for drv_priv we can move htc_handle->drv_priv initialization at the end of the ath9k_htc_probe_device() and add helper macro to make all *_STAT_* macros NULL safe, since syzbot has reported related NULL deref in that macros [1]
How to fix
- linux linux_kernel4.14.291, 4.19.256, 5.4.211, 5.10.137, 5.15.61, 5.18.18, 5.19.2 or later
- git.kernel.org/stable/c/03ca957c5f7b55660957eda20b5db4110319ac7a
- git.kernel.org/stable/c/0ac4827f78c7ffe8eef074bc010e7e34bc22f533
- git.kernel.org/stable/c/62bc1ea5c7401d77eaf73d0c6a15f3d2e742856e
- git.kernel.org/stable/c/6b14ab47937ba441e75e8dbb9fbfc9c55efa41c6
- git.kernel.org/stable/c/ab7a0ddf5f1cdec63cb21840369873806fc36d80
- git.kernel.org/stable/c/b66ebac40f64336ae2d053883bee85261060bd27
- git.kernel.org/stable/c/e9e21206b8ea62220b486310c61277e7ebfe7cec
- git.kernel.org/stable/c/eccd7c3e2596b574241a7670b5b53f5322f470e5
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 2.6.35 ≤ v < 4.14.291, 4.15 ≤ v < 4.19.256, 4.20 ≤ v < 5.4.211, 5.5 ≤ v < 5.10.137, 5.11 ≤ v < 5.15.61, 5.16 ≤ v < 5.18.18, 5.19 ≤ v < 5.19.2 | 4.14.291, 4.19.256, 5.4.211, 5.10.137, 5.15.61, 5.18.18, 5.19.2 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.