CVE-2023-53081: 
Linux Kernel vulnerability analysis and mitigation

CVE-2023-53081 is a vulnerability in the Linux kernel's OCFS2 filesystem implementation, discovered and disclosed in May 2025. The vulnerability affects Linux kernel systems using the OCFS2 filesystem (NVD, Wiz).

The vulnerability occurs when a buffered write fails to copy data into the underlying page cache page. In this scenario, ocfs2writeendnolock() zeroes out and dirties the page, which can leave a dirty page beyond EOF. If page writeback attempts to write this page before the write succeeds and expands isize, the page enters an inconsistent state where the page dirty bit is clear but buffer dirty bits remain set (NVD).

The primary impact of this vulnerability is potential data corruption and loss. When exploited, it can result in page data never being written to disk, leading to permanent loss of data that was intended to be written to the OCFS2 filesystem (Wiz).

The vulnerability has been fixed by implementing a solution that invalidates pages beyond EOF after a failed write. Fixed versions are available in various Linux distributions, including Debian bullseye (5.10.234-1), bookworm (6.1.135-1), and trixie (6.12.22-1) (Debian Tracker).