CVE-2024-36843
libmodbus v3.1.6 was discovered to contain a heap overflow via the modbus_mapping_free() function.
libmodbus v3.1.6 was discovered to contain a heap overflow via the modbus_mapping_free() function.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
libmodbus v3.1.6 was discovered to contain a heap overflow via the modbus_mapping_free() function.
- Record
CVE-2024-36843- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-122
- Updated
- 2026-11-02
EUVDEUVD-2024-36227
libmodbus v3.1.6 was discovered to contain a heap overflow via the modbus_mapping_free() function.
- Record
EUVD-2024-36227- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-mh44-x3cr-7p25
libmodbus v3.1.6 was discovered to contain a heap overflow via the modbus_mapping_free() function.
libmodbus v3.1.6 was discovered to contain a heap overflow via the modbus_mapping_free() function.
- Record
GHSA-mh44-x3cr-7p25- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-122
- Updated
- 2026-11-02
NVD
libmodbus v3.1.6 was discovered to contain a heap overflow via the modbus_mapping_free() function.
- Record
CVE-2024-36843- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Weakness
- CWE-122
- Updated
- 2026-11-02
OSV
libmodbus v3.1.6 was discovered to contain a heap overflow via the modbus_mapping_free() function.
- Record
CVE-2024-36843- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVDEBIAN-CVE-2024-36843
libmodbus v3.1.6 was discovered to contain a heap overflow via the modbus_mapping_free() function.
- Record
DEBIAN-CVE-2024-36843- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVJLSEC-2026-1254
libmodbus v3.1.6 was discovered to contain a heap overflow via the modbus_mapping_free() function.
- Record
JLSEC-2026-1254- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2024-36843
libmodbus v3.1.6 was discovered to contain a heap overflow via the modbus_mapping_free() function.
- Record
UBUNTU-CVE-2024-36843- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libmodbusDebian:12 |
before 3.1.6-2.1 | 3.1.6-2.1 |
libmodbusDebian:13 |
before 3.1.6-2.1 | 3.1.6-2.1 |
libmodbusDebian:14 |
before 3.1.6-2.1 | 3.1.6-2.1 |
libmodbusDebian:11 From an advisory covering 5 CVEs |
before 3.1.6-2+deb11u1, plus listed versions 3.1.6-2 |
3.1.6-2+deb11u1 |
LibModbus_jllJulia |
before 3.1.10+0 | 3.1.10+0 |
libmodbusUbuntu:Pro:14.04:LTS |
All versions, plus listed versions 3.0.4-13.0.5-13.0.5-1ubuntu0.1~esm1 |
None known |
libmodbusUbuntu:Pro:16.04:LTS |
All versions, plus listed versions 3.0.6-13.0.6-1ubuntu0.1~esm1 |
None known |
libmodbusUbuntu: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 |
libmodbusUbuntu:20.04:LTS |
All versions, plus listed versions 3.1.6-13.1.6-2 |
None known |
libmodbusUbuntu:22.04:LTS |
All versions, plus listed versions 3.1.6-2 |
None known |
Show 4 moreShow less
| Package | Affected | Fixed |
|---|---|---|
libmodbusUbuntu:24.04:LTS |
All versions, plus listed versions 3.1.6-2.13.1.10-1ubuntu1 |
None known |
libmodbusUbuntu:25.10 |
All versions, plus listed versions 3.1.11-2 |
None known |
libmodbusUbuntu:26.10 |
All versions, plus listed versions 3.1.11-2build13.2.0-1 |
None known |
libmodbusUbuntu:26.04:LTS |
All versions, plus listed versions 3.1.11-23.1.11-2build1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, facts | ||
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2024-36843 is a high vulnerability (CVSS 7.5) in Libmodbus, published May 31, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.79%, the 56th percentile. Fixed in libmodbus 3.1.6-2.1.
References
github.com/stephane/libmodbus/issues/748
lists.debian.org/debian-lts-announce/2025/03/msg00010.html
nvd.nist.gov/vuln/detail/CVE-2024-36843
security-tracker.debian.org/tracker/CVE-2024-36843
ubuntu.com/security/CVE-2024-36843
cve.org/CVERecord?id=CVE-2024-36843