Bug 2358173

Summary:	CVE-2025-3406 stb: Nothings stb Header Array out-of-bounds read [epel-9]
Product:	[Fedora] Fedora EPEL	Reporter:	Michal Findra <mfindra>
Component:	stb	Assignee:	Ben Beasley <code>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	epel9	CC:	code, mhroncok
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["96050952-a272-4f37-86e9-f22f264ca614"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2025-04-08 10:05:25 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:	2358118

Description Michal Findra 2025-04-08 06:11:27 UTC

More information about this security flaw is available in the following bug:

https://bugzilla.redhat.com/show_bug.cgi?id=2358118

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.

Comment 1 Ben Beasley 2025-04-08 10:05:25 UTC

https://nvd.nist.gov/vuln/detail/CVE-2025-3406

The CVE contains little detail and no suggested mitigation.

It is easy to see how an incorrect image-width argument w to the function stbhw_build_tileset_from_image could result in an out-of-bounds read in the data buffer, but an API user only supplies the buffer size indirectly via the w and h arguments, so it’s incumbent on the API user to make sure they are sane – there is nothing that can be done within stbhw_build_tileset_from_image to further validate them.

I am inclined to suggest that this CVE is invalid: the API user must provide a consistent width, height, and data buffer. We don’t say that memcpy() is vulnerable because an API user could pass it the wrong size argument n.