Bug 2490669 (CVE-2026-56132) - CVE-2026-56132 expat: libexpat: Arbitrary Code Execution via Heap-based Buffer Overflow
Summary: CVE-2026-56132 expat: libexpat: Arbitrary Code Execution via Heap-based Buffe...
Keywords:
Status: NEW
Alias: CVE-2026-56132
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2493639 2493638
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-19 05:01 UTC by OSIDB Bzimport
Modified: 2026-09-14 13:31 UTC (History)
20 users (show)

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

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2026:65161 0 None None None 2026-09-08 09:27:00 UTC
Red Hat Product Errata RHBA-2026:65533 0 None None None 2026-09-08 16:40:44 UTC
Red Hat Product Errata RHBA-2026:65877 0 None None None 2026-09-09 09:02:44 UTC
Red Hat Product Errata RHBA-2026:67288 0 None None None 2026-09-14 13:27:21 UTC
Red Hat Product Errata RHBA-2026:67297 0 None None None 2026-09-14 13:31:40 UTC
Red Hat Product Errata RHSA-2026:64809 0 None None None 2026-09-08 04:29:23 UTC
Red Hat Product Errata RHSA-2026:64810 0 None None None 2026-09-08 05:51:24 UTC
Red Hat Product Errata RHSA-2026:64812 0 None None None 2026-09-08 06:42:41 UTC

Description OSIDB Bzimport 2026-06-19 05:01:29 UTC 
In libexpat before 2.8.2, there is a heap-based buffer overflow in doProlog in xmlparse.c because scaffold backing array reallocation is mishandled when there is data-structure sharing across parsers.
Comment 3 errata-xmlrpc 2026-09-08 04:29:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:64809 https://access.redhat.com/errata/RHSA-2026:64809
Comment 4 errata-xmlrpc 2026-09-08 05:51:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:64810 https://access.redhat.com/errata/RHSA-2026:64810
Comment 5 errata-xmlrpc 2026-09-08 06:42:39 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:64812 https://access.redhat.com/errata/RHSA-2026:64812
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