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.

Classification

CVE ID: CVE-2023-52631

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.05% (probability of being exploited)

EPSS Percentile: 17.81% (scored less or equal to compared to others)

EPSS Date: 2025-02-03 (when was this score calculated)

References

https://git.kernel.org/stable/c/ae4acad41b0f93f1c26cc0fc9135bb79d8282d0b
https://git.kernel.org/stable/c/ec1bedd797588fe38fc11cba26d77bb1d9b194c6
https://git.kernel.org/stable/c/fb7bcd1722bc9bc55160378f5f99c01198fd14a7
https://git.kernel.org/stable/c/686820fe141ea0220fc6fdfc7e5694f915cf64b2
https://git.kernel.org/stable/c/b2dd7b953c25ffd5912dda17e980e7168bebcf6c

Timeline