PT-2025-51920 · Capstone+1 · Capstone+1

Finder16 · Published 2025-12-17 · Updated 2026-03-25 · CVE-2025-67873

Positive Technologies · (AI Summary)

CVSS v3.1

7.8

High

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Capstone versions 6.0.0-Alpha5 and prior

Description Capstone, a disassembly framework, contains a flaw where the length of skipdata is not properly validated. A user-provided skipdata callback can trigger a heap buffer overflow in the disassembly path by allowing cs disasm/cs disasm iter to write beyond the allocated memory in cs insn.bytes, specifically exceeding 24 bytes. This occurs due to insufficient bounds checking.

Recommendations Update to a version later than 6.0.0-Alpha5.

Exploit

Fix

Heap Based Buffer Overflow

Weakness Enumeration

CWE-122

Related Identifiers

ALSA-2026:4898

CVE-2025-67873

GHSA-HJ6G-V545-V7JG

RHSA-2026:4898

RHSA-2026:5123

RHSA-2026:5124

RHSA-2026:5125

SUSE-SU-2026:0060-1

SUSE-SU-2026:20054-1

SUSE-SU-2026:20868-1

Affected Products

Capstone

Debian

References · 36

• 🔥 https://github.com/capstone-engine/capstone/security/advisories/GHSA-hj6g-v545-v7jg · Exploit
• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/67xxx/CVE-2025-67873.json · Exploit
• https://github.com/capstone-engine/capstone/commit/cbef767ab33b82166d263895f24084b75b316df3 · Patch
• https://ubuntu.com/security/CVE-2025-67873 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2026-4898.html · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:0060-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-67873 · Vendor Advisory
• https://errata.almalinux.org/9/ALSA-2026-4898.html · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-67873 · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2026:4898 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:20054-1 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2025-67873 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-67873 · Security Note
• https://osv.dev/vulnerability/SUSE-SU-2026:20868-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-67873 · Security Note