CyberRota Analysis
AI-GeneratedThe vulnerability in the Linux kernel affects the SMB client, specifically in the handling of tree connect responses with insufficient byte counts. This flaw can lead to a potential out-of-bounds read, allowing attackers to access memory beyond allocated buffers, which may expose sensitive data to userspace. Organizations using Linux systems that implement SMB should prioritize patching this vulnerability to mitigate the risk of data leakage and maintain system integrity.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: reject a tree connect response whose byte count is too small CIFSTCon() bounds its strnlen() over the byte area with the server's ByteCount minus two, which for ByteCount 0 or 1 goes negative as an int and converts to a huge size_t. The later subtraction wraps the __u16 bytes_left, and that is what bounds cifs_strndup_from_utf16(): a bound of up to 65535 against a ~16 KB cifs_req_poolp object runs off the end of the slab object, and the bytes reach userspace through tcon->nativeFileSystem in /proc/fs/cifs/DebugData. Reject a byte area too small for what the parser consumes. Two bytes is the least it can consume, and no conformant response carries fewer. The new trace point is the 129th smb_eio_trace entry, which __mode(byte) cannot represent, so the attribute goes with it.