Vulnerability · Published May 31, 2024 · Assigned by mitre
CVE-2024-36844
High 7.5
In plain English
A high-severity use-after-free in the libmodbus package (Debian). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 49% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.6%top 50.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | libmodbus | 3.1.6-2.1 | DEBIAN-CVE-2024-36844 |
| Debian:13 | libmodbus | 3.1.6-2.1 | DEBIAN-CVE-2024-36844 |
| Debian:14 | libmodbus | 3.1.6-2.1 | DEBIAN-CVE-2024-36844 |
| Ubuntu:22.04:LTS | libmodbus | no fix listed | UBUNTU-CVE-2024-36844 |
| Ubuntu:24.04:LTS | libmodbus | no fix listed | UBUNTU-CVE-2024-36844 |
| Ubuntu:25.10 | libmodbus | no fix listed | UBUNTU-CVE-2024-36844 |
| Ubuntu:26.04:LTS | libmodbus | no fix listed | UBUNTU-CVE-2024-36844 |
| Ubuntu:26.10 | libmodbus | no fix listed | UBUNTU-CVE-2024-36844 |
Affected products (as reported)
Weakness: CWE-416 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H