Buffer Management Vulnerability in Linux Kernel OCFS2

CVE-2026-80881

What is CVE-2026-80881?

A flaw in the OCFS2 read block handling within the Linux kernel can result in improper buffer head management, allowing potentially stale data to be submitted to the metadata cache. The vulnerability arises when the ownership assumption of the buffer head is violated, leading to situations where the BH_Uptodate flag is incorrectly set even after data validation failures. Immediate clearance of this flag post-validation is critical to preventing the propagation of invalid data and ensuring data integrity in OCFS2 file systems.

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