Medium 4.8Published Dec 17, 2025

CVE-2025-68114Capstone doesn't check vsnprintf return in SStream_concat, allows stack buffer underflow and overflow

Updated under an hour ago (Oct 28, 2026, 5:25 PM ET)

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It affects capstone-engine capstone and 1 other product. Add what you run to find out whether that includes you.

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Every CVE for capstone-engine capstone

Exploited in the last 30 days

Capstone is a disassembly framework. In versions 6.0.0-Alpha5 and prior, an unchecked vsnprintf return in SStream_concat lets a malicious cs_opt_mem.vsnprintf drive SStream’s index negative or past the end, leading to a stack buffer underflow/overflow when the next write occurs. Commit 2c7797182a1618be12017d7d41e0b6581d5d529e fixes the issue.

CVSS: 4.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
Weakness (CWE): CWE-124, CWE-120
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Dec 18, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

capstone-engine capstone capstone_engine:capstone (from the name)	through 6.0.0-Alpha5	CNA record
capstone-engine capstone capstone-engine:capstone	before 6.0.0; 6.0.0; 6.0.0; 6.0.0; 6.0.0; 6.0.0	NVD

References

References

https://github.com/capstone-engine/capstone/security/advisories/GHSA-85f5-6xr3-q76r	x-refsource-confirm, vendor-advisory
https://github.com/capstone-engine/capstone/commit/2c7797182a1618be12017d7d41e0b6581d5d529e	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.