DEBIAN-CVE-2026-55893
- Source
- https://security-tracker.debian.org/tracker/CVE-2026-55893
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55893.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-55893
- Upstream
- Published
- 2026-08-20T22:17:22Z
- Modified
- 2026-09-14T17:03:20Z
- Severity
-
- 7.3 (High) CVSS_V4 - CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
- Summary
- [none]
- Details
-
Capstone is a disassembly framework. In 6.0.0-Alpha9 and earlier, Capstone's arch/SH/SHDisassembler.c SH floating-point decoders such as opFADD, opFMUL, and opFSUB call set_reg() and set_reg_n() using sh_info.op.op_count without checking the fixed-size operands[] array. Repeated crafted instructions processed through cs_disasm_iter() or cs_disasm() with CS_ARCH_SH, CS_MODE_SH2A or CS_MODE_SH4A, CS_MODE_SHFPU, and CS_OPT_DETAIL can increment the operand count beyond the 176-byte sh_info allocation and perform a four-byte heap buffer overflow write. The corruption can crash the process and may enable code execution depending on heap layout. This issue is fixed in version 6.0.0-Alpha10.
- References
Affected packages
Debian:12 / capstone
Package
- Name
- capstone
- Purl
- pkg:deb/debian/capstone?arch=source&distro=bookworm
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0 Unknown introduced version / All previous versions are affected
Debian:13 / capstone
Package
- Name
- capstone
- Purl
- pkg:deb/debian/capstone?arch=source&distro=trixie
Debian:14 / capstone
Package
- Name
- capstone
- Purl
- pkg:deb/debian/capstone?arch=source&distro=forky