CVE-2024-47736

Task hang via overlapped EROFS pclusters

Published Oct 21, 2024 · Updated Sep 8, 2026

Denial of service in Linux EROFS allows local users to hang tasks by accessing a crafted compressed filesystem image with overlapping pclusters. Within fs/erofs/zdata.c, z_erofs_fill_bio_vec() and BIO submission are ordered incorrectly for nonincremental physical blocks, creating waits on locked cached folios. Exploitation requires local access to a deliberately malformed EROFS image; normal mkfs output cannot create the overlap, and the reported result is a task hang rather than data disclosure or code execution.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux EROFS allows local users to hang tasks by accessing a crafted compressed filesystem image with overlapping pclusters. Within fs/erofs/zdata.c, z_erofs_fill_bio_vec() and BIO submission are ordered incorrectly for nonincremental physical blocks, creating waits on locked cached folios. Exploitation requires local access to a deliberately malformed EROFS image; normal mkfs output cannot create the overlap, and the reported result is a task hang rather than data disclosure or code execution.

The record

CVE
CVE-2024-47736
Published
Oct 21, 2024
Updated
Sep 8, 2026
Vendor
Siemens
Product
SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
Classifications
CWE-404, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Oct 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 8, 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=V3.1.5 <*
  2. Affected versionversion=V3.1.6 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIPLUS S7-1500 CPU 1518-4 PN/DP MFPversion=V3.1.5 <*; version=V3.1.6 <*
The Linux Kernel Organization · Linuxversion=5.13; version=8e6c8fa9f2e95c88a642521a5da19a8e31748846 <1bf7e414cac303c9aec1be67872e19be8b64980c; version=8e6c8fa9f2e95c88a642521a5da19a8e31748846 <9cfa199bcbbbba31cbf97b2786f44f4464f3f29a; version=8e6c8fa9f2e95c88a642521a5da19a8e31748846 <9e2f9d34dd12e6e5b244ec488bcebd0c2d566c50; version=8e6c8fa9f2e95c88a642521a5da19a8e31748846 <b9b30af0e86ffb485301ecd83b9129c9dfb7ebf8; version=8e6c8fa9f2e95c88a642521a5da19a8e31748846 <c1172e65aad4b115392ea4c6e61e56e5b9b69df4
Siemens · SIMATIC S7-1500 CPU 1518F-4 PN/DP MFPversion=V3.1.5 <*; version=V3.1.6 <*
Siemens · SIMATIC S7-1500 CPU 1518-4 PN/DP MFPversion=V3.1.5 <*; version=V3.1.6 <*

Published CVSS scores

5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Siemens ProductCERTCVSS: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

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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

CWE-404Improper Resource Shutdown or Release
T1499Endpoint Denial of Service

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

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Your stack

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