# CVE-2022-0367: libmodbus: A heap-based buffer overflow flaw was found in libmodbus in function modbus_reply() in src/modbus.c.

CVE-2022-0367 is fixed in libmodbus on 1 platform, first by DEBIAN-CVE-2022-0367, released August 29, 2022. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-0367
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0046
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 29, 2022

## Description

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

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libmodbus Debian 11.6 (bullseye) | 3.1.6-2+deb11u1 | [DLA-4084-1](https://patchblox.com/security/data/fix/linux/dla-4084-1.md) | Mar 11, 2025 |
| Linux | libmodbus Debian 12.15 (bookworm) | 3.1.6-2.1 | [DEBIAN-CVE-2022-0367](https://patchblox.com/security/data/fix/linux/debian-cve-2022-0367.md) | Aug 29, 2022 |
| Linux | libmodbus Debian 13.5 (trixie) | 3.1.6-2.1 | [DEBIAN-CVE-2022-0367](https://patchblox.com/security/data/fix/linux/debian-cve-2022-0367.md) | Aug 29, 2022 |
| Linux | libmodbus Debian 14 | 3.1.6-2.1 | [DEBIAN-CVE-2022-0367](https://patchblox.com/security/data/fix/linux/debian-cve-2022-0367.md) | Aug 29, 2022 |

---

Data as of 2026-11-07T18:46:35Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.