Bug 2559136

Summary:	CVE-2026-113679 mingw-harfbuzz: HarfBuzz: Out-of-bounds write via crafted font in WebAssembly shaper [fedora-44]
Product:	[Fedora] Fedora	Reporter:	Joel Chamberlain <jochambe>
Component:	mingw-harfbuzz	Assignee:	Kalev Lember <kalevlember>
Status:	CLOSED ERRATA	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	44	CC:	kalevlember, manisandro
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["faf64dd7-55f2-4786-9d2d-5972f141725c"]}
Fixed In Version:	mingw-harfbuzz-14.6.0-1.fc44	Doc Type:	---
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-11-04 01:35:50 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:	2556270

Description Joel Chamberlain 2026-10-22 16:45:46 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.

HarfBuzz 8.0.0 through 14.6.0 contains an out-of-bounds write vulnerability in the experimental WebAssembly shaper because the font_glyph_to_string import has a wrong WAMR signature. Attackers can supply a crafted font whose wasm module places the output buffer near linear memory's end, writing glyph-name bytes into host memory to crash or corrupt applications.

Comment 1 Fedora Update System 2026-10-26 14:27:44 UTC

FEDORA-2026-cb54091d9d (mingw-harfbuzz-14.6.0-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-cb54091d9d

Comment 2 Fedora Update System 2026-10-27 01:57:33 UTC

FEDORA-2026-cb54091d9d has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-cb54091d9d`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-cb54091d9d

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 3 Fedora Update System 2026-11-04 01:35:50 UTC

FEDORA-2026-cb54091d9d (mingw-harfbuzz-14.6.0-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.