CVE-2025-53155: 
vulnerability analysis and mitigation

A vulnerability in the Linux kernel's OCFS2 filesystem implementation was discovered and tracked as CVE-2024-53155. The issue was first published on December 24, 2024, and involves an uninitialized value in the ocfs2fileread_iter() function. This vulnerability affects multiple versions of the Linux kernel, ranging from version 2.6.22 up to the latest 6.12.2 releases (NVD).

The vulnerability stems from an uninitialized value in the ocfs2fileread_iter() function where an instance of 'struct kiocb' may be passed from the block layer with an uninitialized 'private' field. The issue was identified through KMSAN (Kernel Memory Sanitizer) analysis. The vulnerability has been assigned a CVSS v3.1 base score of 7.1 (HIGH) with the vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H, indicating local access requirements with potential for high confidentiality and availability impacts (NVD).

The vulnerability could potentially lead to information disclosure and system availability issues due to the use of uninitialized resources (CWE-908). The high CVSS score indicates significant potential impact on system security, particularly affecting confidentiality and availability of the system (NVD).

A fix has been implemented by introducing 'ocfs2iocbinitrwlocked()' function and using it where 'ocfs2dioendio()' might be involved, specifically in 'ocfs2filereaditer()' and 'ocfs2filewrite_iter()' functions. Multiple patches have been released to address this vulnerability across different kernel versions (Kernel.org).