Bug 2521130

Summary:	CVE-2025-67873 rust: Capstone: Heap buffer overflow via skipdata callback allows denial of service or arbitrary code execution. [fedora-43]
Product:	[Fedora] Fedora	Reporter:	Praise Ogwuche <pogwuche>
Component:	rust	Assignee:	Rust SIG <rust-sig>
Status:	CLOSED NOTABUG	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	43	CC:	amulhern, igor.raits, jchecahi, jistone, paumurph, rust-sig
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["90e919ed-5d1b-42ff-b8d6-6bdcc5c92cd6"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-08-21 21:29:53 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2423419

Description Praise Ogwuche 2026-08-21 19:29:18 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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 in the disassembly path. Commit cbef767ab33b82166d263895f24084b75b316df3 fixes the issue.

Comment 1 Josh Stone 2026-08-21 21:29:53 UTC

Capstone is only used by the miri tool, which we do not build or ship in any way. We even delete the bundled capstone sources in %prep.