Vulnerability · Published May 1, 2024 · Assigned by mitre
CVE-2023-26793
Critical 9.8
In plain English
A critical-severity heap buffer overflow in the libmodbus package (Ubuntu). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.7%top 45.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
libmodbus v3.1.10 has a heap-based buffer overflow vulnerability in read_io_status function in src/modbus.c.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | libmodbus | no fix listed | UBUNTU-CVE-2023-26793 |
| Ubuntu:24.04:LTS | libmodbus | no fix listed | UBUNTU-CVE-2023-26793 |
| Ubuntu:25.10 | libmodbus | no fix listed | UBUNTU-CVE-2023-26793 |
| Ubuntu:26.04:LTS | libmodbus | no fix listed | UBUNTU-CVE-2023-26793 |
| Ubuntu:26.10 | libmodbus | no fix listed | UBUNTU-CVE-2023-26793 |
Affected products (as reported)
Weakness: CWE-122 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H