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CVE-2024-36844

libmodbus v3.1.6 was discovered to contain a use-after-free via the ctx->backend pointer. This...

7.5 HighFix available

libmodbus v3.1.6 was discovered to contain a use-after-free via the ctx->backend pointer. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted message sent to the unit-test-server.

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

0.61%Up 0.6 points since Feb 14, 2025
90%50%10%1%

What each source reports

CVE List Score used 7.5

libmodbus v3.1.6 was discovered to contain a use-after-free via the ctx->backend pointer. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted message sent to the unit-test-server.

Record
CVE-2024-36844
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-416
Updated
2026-11-02
EUVDEUVD-2024-36228 7.5

libmodbus v3.1.6 was discovered to contain a use-after-free via the ctx->backend pointer. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted message sent to the unit-test-server.

Record
EUVD-2024-36228
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-2625-j643-gg22 7.5

libmodbus v3.1.6 was discovered to contain a use-after-free via the ctx->backend pointer. This...

libmodbus v3.1.6 was discovered to contain a use-after-free via the ctx->backend pointer. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted message sent to the unit-test-server.

Record
GHSA-2625-j643-gg22
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-416
Updated
2026-11-02
NVD 7.5

libmodbus v3.1.6 was discovered to contain a use-after-free via the ctx->backend pointer. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted message sent to the unit-test-server.

Record
CVE-2024-36844
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-416
Updated
2026-11-02
OSV 7.5

libmodbus v3.1.6 was discovered to contain a use-after-free via the ctx->backend pointer. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted message sent to the unit-test-server.

Record
CVE-2024-36844
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2024-36844 7.5

libmodbus v3.1.6 was discovered to contain a use-after-free via the ctx->backend pointer. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted message sent to the unit-test-server.

Record
DEBIAN-CVE-2024-36844
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVJLSEC-2026-1255 7.5

libmodbus v3.1.6 was discovered to contain a use-after-free via the ctx->backend pointer. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted message sent to the unit-test-server.

Record
JLSEC-2026-1255
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2024-36844 7.5

libmodbus v3.1.6 was discovered to contain a use-after-free via the ctx->backend pointer. This vulnerability allows attackers to cause a Denial of Service (DoS) via a crafted message sent to the unit-test-server.

Record
UBUNTU-CVE-2024-36844
CVSS 3.1
7.5 HighCVSS: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

Affected packages
PackageAffectedFixed
libmodbus
Debian:12
 before 3.1.6-2.1
3.1.6-2.1
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: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_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
Show 4 moreShow less
Affected packages
PackageAffectedFixed
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

History

History
RecordedChangedSources
affected, facts
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

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

In short

CVE-2024-36844 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 0.61%, the 49th percentile. Fixed in libmodbus 3.1.6-2.1.

References

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