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CVE-2024-43859 is a vulnerability in the Linux kernel's Flash-Friendly File System (F2FS). The flaw arises from truncation of preallocated blocks occurring during an inode handling path that can be reached while mounting an F2FS filesystem with checkpointing disabled and garbage collection invoked. In this path, truncation can occur before fscrypt-related inode state has been initialized, leaving inode.i_crypt_info unset. Subsequent read and truncate operations can then reach fscrypt bio-crypt context handling with a NULL cryptographic context, causing a kernel NULL pointer dereference. The issue was resolved by relocating truncation of preallocated blocks to f2fs_file_open(), after fscrypt_file_open() has initialized the required encryption context.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical Linux kernel (Android kernel) elevation-of-privilege vulnerability in the Flash-Friendly File System (F2FS) enabling local privilege escalation.
Android Kernel component privilege escalation vulnerability.
Android Kernel component privilege escalation vulnerability.
A critical elevation-of-privilege vulnerability in the Android/Linux kernel's F2FS component.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.