Bug 2563087

Summary:	CVE-2026-115456 mingw-gcc: Out-of-bounds read in std::from_chars [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Marco Benatto <mbenatto>
Component:	mingw-gcc	Assignee:	Kalev Lember <kalevlember>
Status:	CLOSED NEXTRELEASE	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	low	Docs Contact:
Priority:	low
Version:	rawhide	CC:	kalevlember, manisandro, marcandre.lureau, rjones
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["545bcf7b-5733-4a50-a1bd-1dc74598bd22"]}
Fixed In Version:		Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-10-28 22:03:44 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:	2563044

Description Marco Benatto 2026-10-28 18:43:51 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.

There's a out-of-bounds read in std::from_chars() in libstdc++ when the string being passed as parameter is not NULL terminated. The impact is limited to read invalid float point numbers or reach a non-readable memory position resulting a a Denial-of-Service only.

Comment 1 Sandro Mani 2026-10-28 22:03:44 UTC

I don't think a bug in a compiler qualifies for a CVE. This will be fixed with regular upstream gcc releases, as they become available.