CVE-2023-53486: 
Linux Kernel vulnerability analysis and mitigation

CVE-2023-53486 is a vulnerability in the Linux kernel affecting the NTFS3 filesystem implementation. The vulnerability was discovered in October 2025 and involves improper attribute size checking while enumerating attributes in the filesystem (Ubuntu Security).

The vulnerability exists in the fs/ntfs3 component where attribute size checks were not properly implemented. The issue manifests as a slab-out-of-bounds read vulnerability, specifically when reading memory at an invalid address during the attribute enumeration process. This was confirmed through KASAN (Kernel Address Sanitizer) reports showing unauthorized memory access during filesystem operations (Ubuntu Security).

The vulnerability could lead to out-of-bounds memory access in the kernel, potentially causing system crashes or information leaks. The issue affects various Linux distributions and kernel versions, particularly impacting systems that interact with NTFS filesystems (Ubuntu Security).

Several Linux distributions have released patches to address this vulnerability. Ubuntu has fixed the issue in linux-hwe-5.15 (version 5.15.0-83.92~20.04.1), linux-aws-5.15 (version 5.15.0-1044.49~20.04.1), and linux-azure-5.15 (version 5.15.0-1046.53~20.04.1). The fix combines overflow and boundary checks to ensure proper examination of all attribute sizes during enumeration (Ubuntu Security).