Linux · Linux Kernel · CVE-2021-23134
**Name of the Vulnerable Software and Affected Versions**
Linux kernel versions prior to 5.12.4
**Description**
The issue is related to a Use After Free vulnerability in the NFC sockets of the Linux kernel. This vulnerability can be exploited by a local attacker to elevate their privileges. In typical configurations, the issue can only be triggered by a privileged local user with the CAP NET RAW capability. The vulnerability is associated with the use of memory after it has been freed.
**Recommendations**
For Linux kernel versions prior to 5.12.4, update to version 5.12.4 or later to resolve the issue. As a temporary workaround, consider restricting the use of NFC sockets or disabling the CAP NET RAW capability for non-privileged users until a patch is applied.