CVE-2022-1068: Modbus Tools Modbus Slave (versions 7.4.2 and prior) is vulnerable to a stack-based buffer overflow in the reg

Q: How do I fix CVE-2022-1068?

modbus slave: upgrade to 7.4.3. Exact commands for each OS are on this page.

Q: Is CVE-2022-1068 being exploited?

CVE-2022-1068 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-2022-1068 affect?

CVE-2022-1068 affects modbus slave. Severity is medium (CVSS 5.5). Modbus Tools Modbus Slave (versions 7.4.2 and prior) is vulnerable to a stack-based buffer overflow in the registration field. This may cause the program to crash when a long character string is used.

Q: How urgent is CVE-2022-1068?

Priority 35/100. No elevated risk signals yet.

Routine

MEDIUM 5.5UPGRADE

CVE-2022-1068 is a medium-severity flaw (CVSS 5.5) affecting modbus slave. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Modbus Tools Modbus Slave (versions 7.4.2 and prior) is vulnerable to a stack-based buffer overflow in the registration field. This may cause the program to crash when a long character string is used.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.0% (top 38%)
CISA exploited list	No
Weakness	CWE-121, CWE-787
Published	2022-04-01
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: modbustools

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

Am I affected?

Timeline

2022-04-01 23:15 UTCPublished CVE record published
2026-06-17 04:21 UTCUpdated Record last modified

modbustools modbus slave UPGRADE

Affected: < 7.4.3

Fixed in: 7.4.3

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy modbus-slave || rpm -q modbus-slave || modbus-slave --version

2. UPGRADE to 7.4.3 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade modbus-slave

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade modbus-slave

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-2022-1068?

modbus slave: upgrade to 7.4.3. Exact commands for each OS are on this page.

Is CVE-2022-1068 being exploited?

CVE-2022-1068 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-2022-1068 affect?

CVE-2022-1068 affects modbus slave. Severity is medium (CVSS 5.5). Modbus Tools Modbus Slave (versions 7.4.2 and prior) is vulnerable to a stack-based buffer overflow in the registration field. This may cause the program to crash when a long character string is used.

How urgent is CVE-2022-1068?

Priority 35/100. No elevated risk signals yet.

Related CVEs

CVE-2022-4856 MEDIUM 6.3 UPGRADE A vulnerability has been found in Modbus Tools Modbus Slave up to 7.5.1 and classified as critical

References

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