CVE-2023-52631

fs/ntfs3: Fix an NULL dereference bug

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.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

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

Frequently Asked Questions

What is the severity of CVE-2023-52631?
CVE-2023-52631 has been scored as a medium severity vulnerability.
How to fix CVE-2023-52631?
To fix CVE-2023-52631, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-52631 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-52631 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-52631?
CVE-2023-52631 affects Linux Linux, Linux Linux.
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