Highlights

• Fixed CVE-2025-68114 and CVE-2025-67873 reported by @Finder16 (see below).
• csh and value argument of cs_option are now of type uintptr_t by @kingiler.
• Several improvements on x86 details and assembly text by @hainest and @0verflowme.
• Better support for cross builds.
• Handle previously ignored operands in M68K by @csoren.
• Change Alpha immediate operands to int64_t by @wargio.
• Static Capstone libraries are now built with PIC enabled by @hainest.

CVEs

This release fixes CVE-2025-68114 and CVE-2025-67873 reported by @Finder16.

Only users who have custom implementations of the skipdata callback or vsnprintf are affected.

Version 6.0.0-Alpha6: January 13th, 2026

What's Changed

• Update register semantics for x86 pop instructions by @hainest in https://github.com/capstone-engine/capstone/pull/2770
• Python binding: Support 3.14 free-threaded CPython build by @Antelox in https://github.com/capstone-engine/capstone/pull/2769
• Only publish if tag is present and workflow is triggered by release. by @Rot127 in https://github.com/capstone-engine/capstone/pull/2766
• Add Python prominently to the workflow name to prevent confusion. by @Rot127 in https://github.com/capstone-engine/capstone/pull/2774
• Fix incorrectly defined BSHUFFLE opcode. by @Rot127 in https://github.com/capstone-engine/capstone/pull/2772
• Fix cstest missing size checks by @Rot127 in https://github.com/capstone-engine/capstone/pull/2775
• Update read/written registers for x86 call instructions by @hainest in https://github.com/capstone-engine/capstone/pull/2773
• Apply other VIS instruction fixes from llvm/#130967 by @Rot127 in https://github.com/capstone-engine/capstone/pull/2777
• Fix regex match syntax for project version by @Zangetsu38 in https://github.com/capstone-engine/capstone/pull/2779
• Add workflow to check for C code formatting and format all code with clang-format-17 by @Rot127 in https://github.com/capstone-engine/capstone/pull/2744
• Fix log message in cstest_py/compare.compare_bit_flags by @hainest in https://github.com/capstone-engine/capstone/pull/2783
• DIET MSVC C1001 Fix by @LADIlib in https://github.com/capstone-engine/capstone/pull/2782
• Update read/written registers for x86 interrupt instructions by @hainest in https://github.com/capstone-engine/capstone/pull/2781
• Update read/written registers for x87 comparison instructions by @hainest in https://github.com/capstone-engine/capstone/pull/2784
• Update read/written registers for x86 enter/leave instructions by @hainest in https://github.com/capstone-engine/capstone/pull/2788
• Update read/written registers for x86 procedure return instructions by @hainest in https://github.com/capstone-engine/capstone/pull/2789
• Add instruction details to cstest logging by @hainest in https://github.com/capstone-engine/capstone/pull/2787
• Update read/written registers for x86 interrupt return instructions by @hainest in https://github.com/capstone-engine/capstone/pull/2793
• Remove unused fuzzit.sh script and key. by @Rot127 in https://github.com/capstone-engine/capstone/pull/2797
• Fix assertions if CAPSTONE_ASSERTION_WARNINGS=1. by @Rot127 in https://github.com/capstone-engine/capstone/pull/2792
• Update read/written registers for x86 string instructions by @hainest in https://github.com/capstone-engine/capstone/pull/2790
• Update read/written registers for x86 conditional jump instructions by @hainest in https://github.com/capstone-engine/capstone/pull/2798

New Contributors

• @Zangetsu38 made their first contribution in https://github.com/capstone-engine/capstone/pull/2779
• @LADIlib made their first contribution in https://github.com/capstone-engine/capstone/pull/2782
• @moste00 made their first contribution in https://github.com/capstone-engine/capstone/pull/2804
• @stuxnot made their first contribution in https://github.com/capstone-engine/capstone/pull/2814
• @csoren made their first contribution in https://github.com/capstone-engine/capstone/pull/2839
• @0verflowme made their first contribution in https://github.com/capstone-engine/capstone/pull/2843
• @kingiler made their first contribution in https://github.com/capstone-engine/capstone/pull/2845

Full Changelog: https://github.com/capstone-engine/capstone/compare/6.0.0-Alpha5...6.0.0-Alpha6