CVE-2024-36843

Exp

libmodbus v3.1.6 was discovered to contain a heap overflow via the modbus_mapping_free() function.

Published: 2024-05-31 Last update: 2025-11-03 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-36843 is rated High Exploit Risk (70.8/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.75%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2024-36843

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2024-36843

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-20 0.54% 0.75% +0.21%
2 2026-04-01 0.45% 0.54% +0.09%
3 2025-12-28 — 0.45% —

Full EPSS history (17 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-36843

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2024-36843

OS Trackers for CVE-2024-36843

vendor priority summary link
debian not yet assigned CVE-2024-36843 not yet assigned priority: Debian including 1 source packages (libmodbus), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2024-36843
suse high — https://www.suse.com/security/cve/CVE-2024-36843/
ubuntu medium CVE-2024-36843 medium priority: Ubuntu including 1 source packages (libmodbus), 11 status rows across 11 suites (bionic, focal, jammy, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): needs-triage 8, ignored 3. https://ubuntu.com/security/CVE-2024-36843

Affected software / configurations for CVE-2024-36843

Vendor Product Version Raw CPE
libmodbus libmodbus 3.1.6 cpe:2.3:a:libmodbus:libmodbus:3.1.6:*:*:*:*:*:*:*

References for CVE-2024-36843

cvelogic Threat Intelligence