Zijian Zhang

**Name of the Vulnerable Software and Affected Versions** Linux kernel versions prior to 6.6.65 **Description** A vulnerability in the Linux kernel has been resolved. The issue is related to the introduction of support for vsock and unix sockets in sockmap, where the function `tls sw has ctx tx/rx` cannot presume the socket passed in must be `IS ICSK`. This can cause `tls get ctx` to return an invalid pointer and result in a page fault in the function `tls sw ctx rx`. The error is characterized by an inability to handle a page fault for a specific address. Technical details include the involvement of `sk psock strp data ready` and `virtio transport recv pkt` functions. **Recommendations** To resolve the issue, update to Linux kernel version 6.6.65 or later. As a temporary workaround, consider restricting the use of the vulnerable `tls sw has ctx tx/rx` function until a patch is available. Additionally, be cautious when using `vsock` and `af unix` sockets, as they may be affected by this issue.