CVE-2025-41739 json
CODESYS Control - Linux/QNX SysSocket flaw
published 2025-12-01 11 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-199976
- cvss
- 5.9
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 31%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- CODESYS CODESYS PLCHandler 3.5.21.40
- CODESYS CODESYS Remote Target Visu 3.5.21.40
- CODESYS CODESYS Runtime Toolkit 3.5.21.40
- CODESYS CODESYS Control for BeagleBone SL 4.19.0.0
- CODESYS CODESYS Control for emPC-A/iMX6 SL 4.19.0.0
- CODESYS CODESYS Control for IOT2000 SL 4.19.0.0
- CODESYS CODESYS Control for Linux ARM SL 4.19.0.0
- CODESYS CODESYS Control for Linux SL 4.19.0.0
- CODESYS CODESYS Control for PFC100 SL 4.19.0.0
- CODESYS CODESYS Control for PFC200 SL 4.19.0.0
- CODESYS CODESYS Control for PLCnext SL 4.19.0.0
- CODESYS CODESYS Control for Raspberry Pi SL 4.19.0.0
- CODESYS CODESYS Control for WAGO Touch Panels 600 SL 4.19.0.0
- CODESYS CODESYS Edge Gateway for Linux 4.19.0.0
- CODESYS CODESYS TargetVisu for Linux SL 4.19.0.0
- CODESYS CODESYS Virtual Control SL 4.19.0.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 11 mo ago
Exploit prediction
0.37% chance of exploitation in the next 30 days, higher than 31% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.9 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- CODESYS CODESYS PLCHandler
- CODESYS CODESYS Remote Target Visu
- CODESYS CODESYS Runtime Toolkit
- CODESYS CODESYS Control for BeagleBone SL
- CODESYS CODESYS Control for emPC-A/iMX6 SL
- CODESYS CODESYS Control for IOT2000 SL
- CODESYS CODESYS Control for Linux ARM SL
- CODESYS CODESYS Control for Linux SL
- CODESYS CODESYS Control for PFC100 SL
- CODESYS CODESYS Control for PFC200 SL
- CODESYS CODESYS Control for PLCnext SL
- CODESYS CODESYS Control for Raspberry Pi SL
- CODESYS CODESYS Control for WAGO Touch Panels 600 SL
- CODESYS CODESYS Edge Gateway for Linux
- CODESYS CODESYS TargetVisu for Linux SL
- CODESYS CODESYS Virtual Control SL
Classification
- Weakness
-
- CWE-125 Out-of-bounds Read
References
Sources
- CVE List CVE-2025-41739
- NVD CVE-2025-41739
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.