Vulnerability in Linux Kernel Affects nilfs2 Module

CVE-2026-53320

What is CVE-2026-53320?

A vulnerability in the Linux kernel's nilfs2 module allows malicious actors to bypass dead block checks through corrupted ioctl requests. When bd_oblocknr is incorrectly set to 0, it leads to improper handling during block management, raising concerns for stability and security. The flaw permits non-existent blocks to be targeted, potentially compromising data integrity. This flaw has been addressed by instituting checks that reject ioctl requests with a zero bd_oblocknr, thus enhancing the robustness of the nilfs2 module.

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