Detections
Analytics
CVE-2023-52631
medium
Description
In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: Fix an NULL dereference bug The issue here is when this is called from ntfs_load_attr_list(). The "size" comes from le32_to_cpu(attr->res.data_size) so it can't overflow on a 64bit systems but on 32bit systems the "+ 1023" can overflow and the result is zero. This means that the kmalloc will succeed by returning the ZERO_SIZE_PTR and then the memcpy() will crash with an Oops on the next line.
References
https://git.kernel.org/stable/c/fb7bcd1722bc9bc55160378f5f99c01198fd14a7
https://git.kernel.org/stable/c/ec1bedd797588fe38fc11cba26d77bb1d9b194c6
https://git.kernel.org/stable/c/b2dd7b953c25ffd5912dda17e980e7168bebcf6c
https://git.kernel.org/stable/c/ae4acad41b0f93f1c26cc0fc9135bb79d8282d0b
https://git.kernel.org/stable/c/686820fe141ea0220fc6fdfc7e5694f915cf64b2