CVE-2023-52631

fs/ntfs3: Fix an NULL dereference bug

State: Published
Severity: 5.5 Medium
Published: Apr 2, 2024
Updated: May 11, 2026
Reserved: Mar 6, 2024

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.

Scores

CVSS	Score	Vector	Source
3.1	5.5 Medium	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H	CISA-ADP

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
LinuxLinux	be71b5cba2e6485e8959da7a9f9a44461a1bb074 to before ae4acad41b0f93f1c26cc0fc9135bb79d8282d0bAffected be71b5cba2e6485e8959da7a9f9a44461a1bb074 to before ec1bedd797588fe38fc11cba26d77bb1d9b194c6Affected be71b5cba2e6485e8959da7a9f9a44461a1bb074 to before fb7bcd1722bc9bc55160378f5f99c01198fd14a7Affected be71b5cba2e6485e8959da7a9f9a44461a1bb074 to before 686820fe141ea0220fc6fdfc7e5694f915cf64b2Affected be71b5cba2e6485e8959da7a9f9a44461a1bb074 to before b2dd7b953c25ffd5912dda17e980e7168bebcf6cAffected
LinuxLinux	5.15Affected before 5.15Not affected 5.15.149 through 5.15.Not affected 6.1.78 through 6.1.Not affected 6.6.17 through 6.6.Not affected 6.7.5 through 6.7.Not affected 6.8 and laterNot affected

Product

Versions

LinuxLinux

be71b5cba2e6485e8959da7a9f9a44461a1bb074 to before ae4acad41b0f93f1c26cc0fc9135bb79d8282d0bAffected
be71b5cba2e6485e8959da7a9f9a44461a1bb074 to before ec1bedd797588fe38fc11cba26d77bb1d9b194c6Affected
be71b5cba2e6485e8959da7a9f9a44461a1bb074 to before fb7bcd1722bc9bc55160378f5f99c01198fd14a7Affected
be71b5cba2e6485e8959da7a9f9a44461a1bb074 to before 686820fe141ea0220fc6fdfc7e5694f915cf64b2Affected
be71b5cba2e6485e8959da7a9f9a44461a1bb074 to before b2dd7b953c25ffd5912dda17e980e7168bebcf6cAffected

LinuxLinux

5.15Affected
before 5.15Not affected
5.15.149 through 5.15.*Not affected
6.1.78 through 6.1.*Not affected
6.6.17 through 6.6.*Not affected
6.7.5 through 6.7.*Not affected
6.8 and laterNot affected

References

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