CVE-2023-52631: Linux Kernel

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Linux Linux Kernel: from 5.15, before 5.15.149 (fixed in 5.15.149); from 5.16, before 6.1.78 (fixed in 6.1.78); from 6.2, before 6.6.17 (fixed in 6.6.17); from 6.7, before 6.7.5 (fixed in 6.7.5); version 6.8 only

Published 2024-04-02. Last modified 2026-06-17.