CVE-2024-47726

Local file corruption via unfinished direct I/O

Published Oct 21, 2024 · Updated Aug 5, 2026

A direct-I/O race in Linux F2FS allows local users to overwrite data in blocks reassigned to another inode after block removal. The f2fs_setattr and f2fs_fallocate paths remove blocks without first calling inode_dio_wait, so an unfinished write can land after reassignment. An unprivileged local user needs a mounted F2FS volume and control of the racing file operations; resulting corruption can expose or alter other files and shut down the filesystem.

CVSS severity7.8
High
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A direct-I/O race in Linux F2FS allows local users to overwrite data in blocks reassigned to another inode after block removal. The f2fs_setattr and f2fs_fallocate paths remove blocks without first calling inode_dio_wait, so an unfinished write can land after reassignment. An unprivileged local user needs a mounted F2FS volume and control of the racing file operations; resulting corruption can expose or alter other files and shut down the filesystem.

The record

CVE
CVE-2024-47726
Published
Oct 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1485
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=3.8
  2. Affected versionversion=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <3aa5254d80969cb576601fb9fec7a188cc8dc169
  3. Affected versionversion=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <7be13b73409b553d9d9a6cbb042b4d19e2631cc7
  4. Affected versionversion=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <96cfeb0389530ae32ade8a48ae3ae1ac3b6c009d
  5. Affected versionversion=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <c2a7fc514637f640ff55c3f3e3ed879970814a3f
  6. Affected versionversion=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <e3db757ff9b7101ae68650ac5f6dd5743b68164e
  7. Affected versionversion=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <f81302decd64245bb1bd154ecae0f65a9ee21f04

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.8; version=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <3aa5254d80969cb576601fb9fec7a188cc8dc169; version=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <7be13b73409b553d9d9a6cbb042b4d19e2631cc7; version=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <96cfeb0389530ae32ade8a48ae3ae1ac3b6c009d; version=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <c2a7fc514637f640ff55c3f3e3ed879970814a3f; version=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <e3db757ff9b7101ae68650ac5f6dd5743b68164e; version=98e4da8ca301e062d79ae168c67e56f3c3de3ce4 <f81302decd64245bb1bd154ecae0f65a9ee21f04

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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.

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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

T1485Data Destruction

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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