CVE-2018-25220 | Bochs 2.6-5 contains a stack-based buffer overflow vulnerabi… | CVSS 9.8 CRITICAL

Description

Bochs 2.6-5 contains a stack-based buffer overflow vulnerability that allows attackers to execute arbitrary code by supplying an oversized input string to the application. Attackers can craft a malicious payload with 1200 bytes of padding followed by a return-oriented programming chain to overwrite the instruction pointer and execute shell commands with application privileges.

Metadata

CVE ID: CVE-2018-25220
State: PUBLISHED
Assigner: VulnCheck
Reserved: 2026-03-28 11:46 UTC
Published: 2026-03-28 11:58 UTC
Last updated: 2026-03-30 14:53 UTC
Primary CWE: CWE-787
Out-of-bounds Write
Vendor / Product: bochs / BOCHS
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
bochs	BOCHS	—	2.6-5

Weakness (CWE)

CWE	Source	Description
CWE-787	cna	Out-of-bounds Write

CVSS scores (2)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3	CRITICAL	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References (3)

ExploitDB-43979 https://www.exploit-db.com/exploits/43979
Official Product Homepage http://bochs.sourceforge.net/
VulnCheck Advisory: Bochs 2.6-5 Buffer Overflow Remote Code Execution https://www.vulncheck.com/advisories/bochs-5-buffer-overflow-remote-code-execution