CVE-2024-43859

Kernel crash via uninitialized F2FS encryption context

Published Aug 17, 2024 · Updated May 11, 2026

NULL pointer dereference in affected Linux kernel F2FS builds allows local users to crash the kernel while mounting an F2FS volume. During a checkpoint-disabled mount, f2fs_iget reaches f2fs_truncate before fscrypt_file_open initializes inode.i_crypt_info, and a read bio dereferences the null context. The path requires low local privileges sufficient to initiate the mount, garbage collection, and an inode with preallocated blocks; successful triggering interrupts the host.

CVSS severity5.5
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

NULL pointer dereference in affected Linux kernel F2FS builds allows local users to crash the kernel while mounting an F2FS volume. During a checkpoint-disabled mount, f2fs_iget reaches f2fs_truncate before fscrypt_file_open initializes inode.i_crypt_info, and a read bio dereferences the null context. The path requires low local privileges sufficient to initiate the mount, garbage collection, and an inode with preallocated blocks; successful triggering interrupts the host.

The record

CVE
CVE-2024-43859
Published
Aug 17, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 17, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.17
  2. Affected versionversion=d4dd19ec1ea0cf6532d65709325c42b1398614a8 <298b1e4182d657c3e388adcc29477904e9600ed5
  3. Affected versionversion=d4dd19ec1ea0cf6532d65709325c42b1398614a8 <3ba0ae885215b325605ff7ebf6de12ac2adf204d
  4. Affected versionversion=d4dd19ec1ea0cf6532d65709325c42b1398614a8 <5f04969136db674f133781626e0b692c5f2bf2f0
  5. Affected versionversion=d4dd19ec1ea0cf6532d65709325c42b1398614a8 <f44a25a8bfe0c15d33244539696cd9119cf44d18

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.17; version=d4dd19ec1ea0cf6532d65709325c42b1398614a8 <298b1e4182d657c3e388adcc29477904e9600ed5; version=d4dd19ec1ea0cf6532d65709325c42b1398614a8 <3ba0ae885215b325605ff7ebf6de12ac2adf204d; version=d4dd19ec1ea0cf6532d65709325c42b1398614a8 <5f04969136db674f133781626e0b692c5f2bf2f0; version=d4dd19ec1ea0cf6532d65709325c42b1398614a8 <f44a25a8bfe0c15d33244539696cd9119cf44d18

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo