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CVE-2025-41739

CODESYS Control - Linux/QNX SysSocket flaw

MEDIUM
5.9
CVSS Score
Published: December 1, 2025 at 10:00 AM UTC
Updated: June 17, 2026 at 09:23 AM UTC
16 products affected across 1 vendorControl for emPC-A/iMX6 SLControl for BeagleBone SLControl for PFC100 SL

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Severity
MEDIUM5.9
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

An unauthenticated remote attacker, who beats a race condition, can exploit a flaw in the communication servers of the CODESYS Control runtime system on Linux and QNX to trigger an out-of-bounds read via crafted socket communication, potentially causing a denial of service.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Control for BeagleBone SL· Codesys
60%
4.15.0.0 ≤ v < 4.19.0.04.15.0.0
Affected range stops below 4.19.0.0, so it looks safe — our inference, not a vendor statement
Control for emPC-A/iMX6 SL· Codesys
60%
4.15.0.0 ≤ v < 4.19.0.04.15.0.0
Affected range stops below 4.19.0.0, so it looks safe — our inference, not a vendor statement
Control for IOT2000 SL· Codesys
60%
4.15.0.0 ≤ v < 4.19.0.04.15.0.0
Affected range stops below 4.19.0.0, so it looks safe — our inference, not a vendor statement
Control for Linux ARM SL· Codesys
60%
4.15.0.0 ≤ v < 4.19.0.04.15.0.0
Affected range stops below 4.19.0.0, so it looks safe — our inference, not a vendor statement
Control for Linux SL· Codesys
60%
4.15.0.0 ≤ v < 4.19.0.04.15.0.0
Affected range stops below 4.19.0.0, so it looks safe — our inference, not a vendor statement
Control for PFC100 SL· Codesys
60%
4.15.0.0 ≤ v < 4.19.0.04.15.0.0
Affected range stops below 4.19.0.0, so it looks safe — our inference, not a vendor statement
Control for PFC200 SL· Codesys
60%
4.15.0.0 ≤ v < 4.19.0.04.15.0.0
Affected range stops below 4.19.0.0, so it looks safe — our inference, not a vendor statement
Control for PLCnext SL· Codesys
60%
4.15.0.0 ≤ v < 4.19.0.04.15.0.0
Affected range stops below 4.19.0.0, so it looks safe — our inference, not a vendor statement
Control for Raspberry Pi SL· Codesys
60%
4.15.0.0 ≤ v < 4.19.0.04.15.0.0
Affected range stops below 4.19.0.0, so it looks safe — our inference, not a vendor statement
Control for WAGO Touch Panels 600 SL· Codesys
60%
4.15.0.0 ≤ v < 4.19.0.04.15.0.0
Affected range stops below 4.19.0.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: [email protected]
https://certvde.com/de/advisories/VDE-2025-099

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.9MEDIUMCERTVDE
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-125

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