CVE-2022-49881

In the Linux kernel, the following vulnerability has been resolved:

wifi: cfg80211: fix memory leak in query_regdb_file()

In the function query_regdb_file() the alpha2 parameter is duplicated using kmemdup() and subsequently freed in regdb_fw_cb(). However, request_firmware_nowait() can fail without calling regdb_fw_cb() and thus leak memory.

A memory leak was fixed in query_regdb_file() where kmemdup()'ed memory for the alpha2 parameter was not freed if request_firmware_nowait() failed before invoking the callback. The issue was resolved by explicitly calling kfree(alpha2) when the firmware request fails synchronously. Since access to this function requires capabilities like CAP_NET_ADMIN or direct kernel interaction, the Privileges Required metric is rated High (PR:H).

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.