CVE-2024-33847Public exploit

Filesystem corruption via unaligned compressed-file truncation

Published Jun 24, 2024 · Updated Aug 5, 2026

Improper truncation handling in Linux F2FS 5.14 and later affected branches allows local users to corrupt filesystem metadata. The F2FS partial-truncation path assumes a released compressed inode still has reserved blocks, then changes valid-block accounting without updating i_blocks or total_valid_block_count. A user with write access to a file on a compression-enabled F2FS volume can create persistent accounting inconsistencies that cause fsck failures and can interrupt the filesystem.

CVSS severity7.1
High
EPSS probability0.23%
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

Improper truncation handling in Linux F2FS 5.14 and later affected branches allows local users to corrupt filesystem metadata. The F2FS partial-truncation path assumes a released compressed inode still has reserved blocks, then changes valid-block accounting without updating i_blocks or total_valid_block_count. A user with write access to a file on a compression-enabled F2FS volume can create persistent accounting inconsistencies that cause fsck failures and can interrupt the filesystem.

The record

CVE
CVE-2024-33847
Published
Jun 24, 2024
Updated
Aug 5, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
T1485
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 24, 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

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=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=5.14; version=8e1651cd667cd6779db28314844d88b6de8312a3 <b8962cf98595d1ec62f40f23667de830567ec8bc; version=c61404153eb683da9c35aad133131554861ed561 <29ed2b5dd521ce7c5d8466cd70bf0cc9d07afeee; version=c61404153eb683da9c35aad133131554861ed561 <3ccf5210dc941a7aa0180596ac021568be4d35ec; version=c61404153eb683da9c35aad133131554861ed561 <5268241b41b1c5d0acca75e9b97d4fd719251c8c; version=c61404153eb683da9c35aad133131554861ed561 <8acae047215024d1ac499b3c8337ef1b952f160b; version=c61404153eb683da9c35aad133131554861ed561 <9f9341064a9b5246a32a7fe56b9f80c6f7f3c62d

Published CVSS scores

7.1kernel.orgCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
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 exploitPublished

Weakness, pattern, technique

T1485Data Destruction

Public exploit references

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