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High RLSA-2026:4898 2 CVEs

Important: capstone security update

Published Mar 26, 2026 · Updated Mar 26, 2026

Summary

Capstone is a disassembly framework with the target of becoming the ultimate disasm engine for binary analysis and reversing in the security community.

Security Fix(es):

* capstone: Capstone: Memory corruption via unchecked vsnprintf return (CVE-2025-68114)

* capstone: Capstone: Heap buffer overflow via skipdata callback allows denial of service or arbitrary code execution. (CVE-2025-67873)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Fixed packages 1

ReleasePackageFixed in
Rocky Linux · 9 capstone 0:4.0.2-11.el9_7

Vulnerabilities 2

  • Medium 4.8

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

    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…

  • Medium 4.8

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

    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 th…

References

  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2423416
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2423419