CVE-2022-0367

A heap-based buffer overflow flaw was found in libmodbus in function modbus_reply() in src/modbus.c.

7.8 HighFix available

A heap-based buffer overflow flaw was found in libmodbus in function modbus_reply() in src/modbus.c.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.46%Down 0.4 points since Aug 30, 2022

What each source reports

NVD Score used 7.8

A heap-based buffer overflow flaw was found in libmodbus in function modbus_reply() in src/modbus.c.

Record: CVE-2022-0367
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-119, CWE-787
Updated: 2026-11-02

CVE List No score

A heap-based buffer overflow flaw was found in libmodbus in function modbus_reply() in src/modbus.c.

Record: CVE-2022-0367
Weakness: CWE-119
Updated: 2026-11-02

EUVDEUVD-2022-15522 No score

A heap-based buffer overflow flaw was found in libmodbus in function modbus_reply() in src/modbus.c.

Record: EUVD-2022-15522
Updated: 2026-11-02

GitHub AdvisoriesGHSA-w46r-g3fx-q46r 7.8

A heap-based buffer overflow flaw was found in libmodbus in function modbus_reply() in src/modbus.c.

A heap-based buffer overflow flaw was found in libmodbus in function modbus_reply() in src/modbus.c.

Record: GHSA-w46r-g3fx-q46r
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-119, CWE-787
Updated: 2026-11-02

OSVALPINE-CVE-2022-0367 7.8

A heap-based buffer overflow flaw was found in libmodbus in function modbus_reply() in src/modbus.c.

Record: ALPINE-CVE-2022-0367
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-03

OSVDEBIAN-CVE-2022-0367 7.8

A heap-based buffer overflow flaw was found in libmodbus in function modbus_reply() in src/modbus.c.

Record: DEBIAN-CVE-2022-0367
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-03

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OSVJLSEC-2026-1250 7.8

A heap-based buffer overflow flaw was found in libmodbus in function modbus_reply() in src/modbus.c.

Record: JLSEC-2026-1250
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2022-0367 7.8

A heap-based buffer overflow flaw was found in libmodbus in function modbus_reply() in src/modbus.c.

Record: UBUNTU-CVE-2022-0367
CVSS 3.1: 7.8 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSV No score

A heap-based buffer overflow flaw was found in libmodbus in function modbus_reply() in src/modbus.c.

Record: CVE-2022-0367
Weakness: CWE-119
Updated: 2026-11-02

OSVopenSUSE-SU-2022:10196-1 No score

Security update for libmodbus

This update for libmodbus fixes the following issues:

CVE-2022-0367: Fixed heap-based Buffer Overflow in modbus_reply (boo#1195124).

Record: openSUSE-SU-2022:10196-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`libmodbus` Alpine:v3.16	before 3.1.8-r0	3.1.8-r0
`libmodbus` Alpine:v3.17	before 3.1.8-r0	3.1.8-r0
`libmodbus` Alpine:v3.18	before 3.1.8-r0	3.1.8-r0
`libmodbus` Alpine:v3.19	before 3.1.8-r0	3.1.8-r0
`libmodbus` Alpine:v3.20	before 3.1.8-r0	3.1.8-r0
`libmodbus` Alpine:v3.21	before 3.1.8-r0	3.1.8-r0
`libmodbus` Alpine:v3.22	before 3.1.8-r0	3.1.8-r0
`libmodbus` Alpine:v3.23	before 3.1.8-r0	3.1.8-r0
`libmodbus` Alpine:v3.24	before 3.1.8-r0	3.1.8-r0
`libmodbus` Debian:12	before 3.1.6-2.1	3.1.6-2.1

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Affected packages
Package	Affected	Fixed
`libmodbus` Debian:13	before 3.1.6-2.1	3.1.6-2.1
`libmodbus` Debian:14	before 3.1.6-2.1	3.1.6-2.1
`libmodbus` Debian:10	before 3.1.4-2+deb10u2, plus listed versions 3.1.4-23.1.4-2+deb10u1	3.1.4-2+deb10u2
`libmodbus` Debian:11	before 3.1.6-2+deb11u1, plus listed versions 3.1.6-2	3.1.6-2+deb11u1
`LibModbus_jll` Julia	before 3.1.10+0	3.1.10+0
`libmodbus` Ubuntu:Pro:14.04:LTS	All versions, plus listed versions 3.0.4-13.0.5-13.0.5-1ubuntu0.1~esm1	None known
`libmodbus` Ubuntu:Pro:16.04:LTS	All versions, plus listed versions 3.0.6-13.0.6-1ubuntu0.1~esm1	None known
`libmodbus` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 3.0.6-23.0.6-2ubuntu0.1~esm13.0.6-2+deb9u1build0.18.04.1	None known
`libmodbus` Ubuntu:20.04:LTS	All versions, plus listed versions 3.1.6-13.1.6-2	None known
`libmodbus` Ubuntu:22.04:LTS	All versions, plus listed versions 3.1.6-2	None known
`libmodbus` Ubuntu:24.04:LTS	All versions, plus listed versions 3.1.6-2.13.1.10-1ubuntu1	None known
`libmodbus` Ubuntu:25.10	All versions, plus listed versions 3.1.11-2	None known
`libmodbus` Ubuntu:26.10	All versions, plus listed versions 3.1.11-2build13.2.0-1	None known
`libmodbus` Ubuntu:26.04:LTS	All versions, plus listed versions 3.1.11-23.1.11-2build1	None known
`libmodbus` SUSE:Package Hub 15 SP4	before 3.1.6-bp154.2.3.1	3.1.6-bp154.2.3.1
`libmodbus` openSUSE:Leap 15.4	before 3.1.6-bp154.2.3.1	3.1.6-bp154.2.3.1

History

History
Recorded	Changed	Sources
Nov 3, 2026	affected, aliases, references	OSV
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2022-0367 is a high vulnerability (CVSS 7.8) in Libmodbus, published August 29, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.46%, the 39th percentile. Fixed in libmodbus 3.1.8-r0.

References

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