Critical severity · published Dec 17, 2025
CVE-2025-68114
Capstone doesn't check vsnprintf return in SStream_concat, allows stack buffer underflow and overflow
9.8
CVSS
0.2%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CA
capstone · capstone-engine
<= 6.0.0-Alpha5 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-68114
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-68114
Patch
https://github.com/capstone-engine/capstone/commit/2c7797182a1618be12017d7d41e0b6581d5d529e
Vendor Advisory
https://github.com/capstone-engine/capstone/security/advisories/GHSA-85f5-6xr3-q76r
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