Bug 2530731

Summary:	CVE-2026-86138 libxml2: libxml2: Arbitrary code execution via heap-based buffer overflow [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Srikanth Balasubramanian <sbalasub>
Component:	libxml2	Assignee:	David King <amigadave>
Status:	MODIFIED ---	QA Contact:	Fedora Extras Quality Assurance <extras-qa>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	amigadave
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["3f412491-1aea-4cad-af86-66225fa9d0df"]}
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2528986

Description Srikanth Balasubramanian 2026-09-09 11:21:58 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.

In libxml2 before 2.15.4, xmlDictAddQString in dict.c has an integer overflow and resultant heap-based buffer overflow.

Comment 1 Fedora Update System 2026-09-12 09:35:11 UTC

FEDORA-2026-081eb18404 (0ad-0.28.0-7.fc46, abiword-3.0.8-6.fc46, and 480 more) has been submitted as an update to Fedora 46.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-081eb18404

Comment 2 Fedora Update System 2026-09-13 17:35:47 UTC

FEDORA-2026-081eb18404 (0ad-0.28.0-7.fc46, abiword-3.0.8-6.fc46, and 483 more) has been pushed to the Fedora 46 stable repository.
If problem still persists, please make note of it in this bug report.