CVE-2025-67873
Capstone doesn't check Skipdata length, leading to cs_insn.bytes heap buffer overflow
Description
Capstone is a disassembly framework. In versions 6.0.0-Alpha5 and prior, Skipdata length is not bounds-checked, so a user-provided skipdata callback can make cs_disasm/cs_disasm_iter memcpy more than 24 bytes into cs_insn.bytes, causing a heap buffer overflow in the disassembly path. Commit cbef767ab33b82166d263895f24084b75b316df3 fixes the issue.
INFO
Published Date :
Dec. 17, 2025, 10:16 p.m.
Last Modified :
Dec. 18, 2025, 3:16 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2025-67873
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE |
Solution
- Update Capstone to a fixed version.
- Apply the provided commit to fix the overflow.
- Ensure skipdata length is bounds-checked.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-67873.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-67873 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-67873
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-67873 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-67873 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Dec. 18, 2025
Action Type Old Value New Value Added Reference https://github.com/capstone-engine/capstone/security/advisories/GHSA-hj6g-v545-v7jg -
New CVE Received by [email protected]
Dec. 17, 2025
Action Type Old Value New Value Added Description Capstone is a disassembly framework. In versions 6.0.0-Alpha5 and prior, Skipdata length is not bounds-checked, so a user-provided skipdata callback can make cs_disasm/cs_disasm_iter memcpy more than 24 bytes into cs_insn.bytes, causing a heap buffer overflow in the disassembly path. Commit cbef767ab33b82166d263895f24084b75b316df3 fixes the issue. Added CVSS V3.1 AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L Added CWE CWE-122 Added Reference https://github.com/capstone-engine/capstone/commit/cbef767ab33b82166d263895f24084b75b316df3 Added Reference https://github.com/capstone-engine/capstone/security/advisories/GHSA-hj6g-v545-v7jg