CVE-2024-46744

Kernel crash via oversized Squashfs symlink size

Published Sep 18, 2024 · Updated May 12, 2026

Use of uninitialized memory in Linux Squashfs allows local users to crash the kernel by accessing a symbolic link in a malformed filesystem image. squashfs_symlink_read_folio stores the oversized inode size in a signed integer, producing a negative length that skips page initialization. Exploitation requires local access and crafted Squashfs content; the published impact is a kernel crash without confidentiality or integrity loss.

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

What happened

Use of uninitialized memory in Linux Squashfs allows local users to crash the kernel by accessing a symbolic link in a malformed filesystem image. squashfs_symlink_read_folio stores the oversized inode size in a signed integer, producing a negative length that skips page initialization. Exploitation requires local access and crafted Squashfs content; the published impact is a kernel crash without confidentiality or integrity loss.

The record

CVE
CVE-2024-46744
Published
Sep 18, 2024
Updated
May 12, 2026
Vendor
Siemens
Product
SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family
Classifications
CWE-908
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2024CVE publishedPublication date reported by the CVE source.
  2. May 12, 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=0 <V3.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 familyversion=0 <V3.2
Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=2.6.29; version=6545b246a2c815a8fcd07d58240effb6ec3481b1 <087f25b2d36adae19951114ffcbb7106ed405ebb; version=6545b246a2c815a8fcd07d58240effb6ec3481b1 <1b9451ba6f21478a75288ea3e3fca4be35e2a438; version=6545b246a2c815a8fcd07d58240effb6ec3481b1 <5c8906de98d0d7ad42ff3edf2cb6cd7e0ea658c4; version=6545b246a2c815a8fcd07d58240effb6ec3481b1 <810ee43d9cd245d138a2733d87a24858a23f577d; version=6545b246a2c815a8fcd07d58240effb6ec3481b1 <c3af7e460a526007e4bed1ce3623274a1a6afe5e; version=6545b246a2c815a8fcd07d58240effb6ec3481b1 <ef4e249971eb77ec33d74c5c3de1e2576faf6c90; version=6545b246a2c815a8fcd07d58240effb6ec3481b1 <f82cb7f24032ed023fc67d26ea9bf322d8431a90; version=6545b246a2c815a8fcd07d58240effb6ec3481b1 <fac5e82ab1334fc8ed6ff7183702df634bd1d93d
Siemens · SCALANCE XCM/XRM/XCH/XRH-300 familyversion=0 <V3.2
Siemens · RUGGEDCOM RST2428Pversion=0 <V3.2

Published CVSS scores

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

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

CWE-908Use of Uninitialized Resource

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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