by Kastro
Paper/Archive/CVE-2025-68114

CVE-2025-68114

capstone-engine capstone — Capstone doesn't check vsnprintf return in SStream_concat, allows stack buffer underflow and overflow

EPSS 0.2%public exploitCVSS 9.8
critical.is priorityof 100
41
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 10.0.100 × 202.0Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
capstone<= 6.0.0-Alpha5–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)4.8CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: partial

References

exploitgithub.com/capstone-engine/capstone/security/advisories/GHSA-85f5-6xr3-q76rrefgithub.com/capstone-engine/capstone/commit/2c7797182a1618be12017d7d41e0b6581d5d529e