Sanity Check Failure in Linux Kernel's F2FS Implementation
CVE-2026-23265

Currently unrated

Key Information:

Vendor: Linux
Status: Linux
Vendor: CVE Published:; 18 March 2026

What is CVE-2026-23265?

The Linux kernel's F2FS (Flash-Friendly File System) implementation contains a vulnerability that arises from a lack of proper sanity checks on node page footers during read and write operations. Specifically, if a node page's footer is corrupted, the kernel will load this damaged node page asynchronously without validating the footer. This issue can lead to inconsistencies between the node page index and the footer node id (nid). When the corrupted page is later marked as dirty and undergoes writeback, it triggers a bug within the kernel, which can hinder system stability and data integrity.

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