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Vulnerability DatabaseCVE-2025-38677
CVE-2025-38677:
Linux Debian vulnerability analysis and mitigation
Overview
CVE-2025-38677 is a vulnerability discovered in the Linux kernel's F2FS (Flash-Friendly File System) implementation that involves an out-of-boundary access issue in the dnode page. The vulnerability was reported by Jiaming Zhang and was published to the CVE List on August 30, 2025 (NVD).
Technical details
The vulnerability occurs during the f2fsgetdnodeofdata() function execution when handling corrupted images. The specific issue arises when a dnode has the same node ID as its inode, causing the system to incorrectly parse the dnode as an inode node. This results in getdnodeaddr() returning 360, leading to an attempt to access page address from 360 + 934 * 4 = 4096 with 4 bytes (NVD).
Impact
The vulnerability can lead to out-of-boundary access in the dnode page of the F2FS filesystem, potentially causing system instability or crashes when processing corrupted F2FS images (NVD).
Mitigation and workarounds
The fix involves adding sanity checks for node IDs of all direct nodes during the f2fsgetdnodeofdata() function execution. This prevents the incorrect parsing of dnodes as inode nodes when they share the same node ID (NVD).
Additional resources
Source: This report was generated using AI
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