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CVE-2025-67873

Capstone doesn't check Skipdata length, leading to cs_insn.bytes heap buffer overflow

CVSS 4.8 MEDIUMEPSS 0.2%CWE-122
Vexday Risk Score
13Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 4.8EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
17 Dec 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
Affected products
capstone-engine · capstone

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References
https://github.com/capstone-engine/capstone/commit/cbef767ab33b82166d263895f24084b75b316df3https://github.com/capstone-engine/capstone/security/advisories/GHSA-hj6g-v545-v7jg