Bug 2521124

Summary:	CVE-2025-67873 imhex: Capstone: Heap buffer overflow via skipdata callback allows denial of service or arbitrary code execution. [epel-10]
Product:	[Fedora] Fedora EPEL	Reporter:	Praise Ogwuche <pogwuche>
Component:	imhex	Assignee:	Jonathan Wright <jonathan>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	epel10	CC:	jonathan, rebus
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:	---
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Regression:	---	Mount Type:	---
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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 19:28:36 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.