CVE-2023-41375: Use after free vulnerability exists in Kostac PLC Programming Software Version 1.6.11.0

Q: How do I fix CVE-2023-41375?

kostac plc: upgrade to 1.6.10.0. Exact commands for each OS are on this page.

Q: Is CVE-2023-41375 being exploited?

CVE-2023-41375 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-41375 affect?

CVE-2023-41375 affects kostac plc. Severity is high (CVSS 7.8). Use after free vulnerability exists in Kostac PLC Programming Software Version 1.6.11.0. Arbitrary code may be executed by having a user open a specially crafted project file which was saved using Kostac PLC Programming Software Version 1.6

Routine

HIGH 7.8UPGRADE

CVE-2023-41375 is a high-severity flaw (CVSS 7.8) affecting kostac plc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Use after free vulnerability exists in Kostac PLC Programming Software Version 1.6.11.0. Arbitrary code may be executed by having a user open a specially crafted project file which was saved using Kostac PLC Programming Software Version 1.6.9.0 and earlier because the issue exists in parsing of KPP project files. The vendor states that Kostac PLC Programming Software Version 1.6.10.0 or later implements the function which prevents a project file

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 90%)
CISA exploited list	No
Weakness	CWE-416
Published	2023-09-20
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: jtekt

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-09-20 09:15 UTCPublished CVE record published
2026-06-17 06:22 UTCUpdated Record last modified

jtekt kostac plc UPGRADE

Affected: < 1.6.10.0 · 1.6.11.0

Fixed in: 1.6.10.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy kostac-plc || rpm -q kostac-plc || kostac-plc --version

2. UPGRADE to 1.6.10.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade kostac-plc

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade kostac-plc

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-41375?

kostac plc: upgrade to 1.6.10.0. Exact commands for each OS are on this page.

Is CVE-2023-41375 being exploited?

CVE-2023-41375 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-41375 affect?

CVE-2023-41375 affects kostac plc. Severity is high (CVSS 7.8). Use after free vulnerability exists in Kostac PLC Programming Software Version 1.6.11.0. Arbitrary code may be executed by having a user open a specially crafted project file which was saved using Kostac PLC Programming Software Version 1.6

How urgent is CVE-2023-41375?

Priority 30/100. High severity

Related CVEs

CVE-2024-47136 HIGH 7.8 UPGRADE Out-of-bounds read vulnerability exists in Kostac PLC Programming Software (Former name: Koyo PLC Programming
CVE-2024-47135 HIGH 7.8 UPGRADE Stack-based buffer overflow vulnerability exists in Kostac PLC Programming Software (Former name: Koyo PLC Pro
CVE-2023-41374 HIGH 7.8 UPGRADE Double free issue exists in Kostac PLC Programming Software Version 1.6.11.0 and earlier

References

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