PatchSiren cyber security CVE debrief

CVE-2024-41016 Linux CVE debrief

CVE-2024-41016 is a medium-severity vulnerability (CVSS 5.5) in the OCFS2 filesystem affecting Siemens SIMATIC S7-1500 TM MFP industrial control systems with GNU/Linux subsystems. The flaw exists in the ocfs2_xattr_find_entry() function where extended attributes (xattr) may be stored as 'non-indexed' with additional requested space, creating a potential out-of-bounds memory read condition during memcmp operations. While exploitation requires local access and crafted malicious filesystem images, the vulnerability could lead to integrity impacts. The issue was published on April 9, 2024, and remains unpatched as of the source's last modification on May 14, 2026. Siemens and CISA recommend defensive mitigations including restricting interactive shell access to trusted personnel only and ensuring applications are built and run exclusively from trusted sources.

Vendor: Linux
Product: SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
CVSS: MEDIUM 5.5
CISA KEV: Not listed in stored evidence
Original CVE published: 2024-04-09
Original CVE updated: 2026-05-14
Advisory published: 2024-04-09
Advisory updated: 2026-05-14

Who should care

Industrial control system operators, OT security teams, and Siemens SIMATIC S7-1500 TM MFP administrators responsible for securing embedded GNU/Linux subsystems in manufacturing and critical infrastructure environments.

Technical summary

The vulnerability resides in ocfs2_xattr_find_entry() where non-indexed extended attributes with additional allocated space may not have proper bounds checking before memcmp operations. This creates a potential out-of-bounds memory read when processing crafted filesystem images. The attack surface is limited by the requirement for local access and malicious image mounting, but integrity impact is rated high in CVSS scoring.

Defensive priority

medium

Recommended defensive actions

Restrict interactive shell access to the GNU/Linux subsystem to trusted personnel only
Build and run applications exclusively from trusted sources
Monitor for anomalous filesystem image mounting attempts
Apply vendor patches when released by Siemens

Evidence notes

Vulnerability description and affected product confirmed through CISA CSAF advisory ICSA-24-102-01. CVSS vector AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N indicates local attack vector with low attack complexity and low privileges required, no user interaction needed, with integrity impact as primary concern. No availability or confidentiality impact per scoring.

Official resources

public