Bug 2530731 - CVE-2026-86138 libxml2: libxml2: Arbitrary code execution via heap-based buffer overflow [fedora-all]
Summary: CVE-2026-86138 libxml2: libxml2: Arbitrary code execution via heap-based buff...
Keywords:
Status: MODIFIED
Alias: None
Product: Fedora
Classification: Fedora
Component: libxml2
Version: rawhide
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: David King
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["3f412491-1aea-4cad-af86-6...
Depends On:
Blocks: CVE-2026-86138
TreeView+ depends on / blocked
 
Reported: 2026-09-09 11:21 UTC by Srikanth Balasubramanian
Modified: 2026-09-13 17:35 UTC (History)
1 user (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:

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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.
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