Bug 2528987 (CVE-2026-86143) - CVE-2026-86143 libxml2: libxml2: Data integrity issues due to integer overflow in write callbacks
Summary: CVE-2026-86143 libxml2: libxml2: Data integrity issues due to integer overflo...
Keywords:
Status: NEW
Alias: CVE-2026-86143
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: 2530651 2530652 2530653 2530655 2530656 2530657 2530654
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-05 04:41 UTC by OSIDB Bzimport
Modified: 2026-11-02 13:32 UTC (History)
27 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-2026:72291 0 None None None 2026-09-28 01:56:06 UTC
Red Hat Product Errata RHBA-2026:72477 0 None None None 2026-09-28 11:48:15 UTC
Red Hat Product Errata RHBA-2026:73415 0 None None None 2026-09-29 12:38:27 UTC
Red Hat Product Errata RHBA-2026:73745 0 None None None 2026-09-30 04:15:10 UTC
Red Hat Product Errata RHBA-2026:73918 0 None None None 2026-09-30 11:25:22 UTC
Red Hat Product Errata RHBA-2026:74142 0 None None None 2026-09-30 21:41:18 UTC
Red Hat Product Errata RHBA-2026:74468 0 None None None 2026-10-01 16:27:39 UTC
Red Hat Product Errata RHSA-2026:71585 0 None None None 2026-09-24 19:00:37 UTC
Red Hat Product Errata RHSA-2026:71586 0 None None None 2026-09-24 12:54:56 UTC
Red Hat Product Errata RHSA-2026:71641 0 None None None 2026-09-24 16:03:00 UTC
Red Hat Product Errata RHSA-2026:89197 0 None None None 2026-10-27 22:03:23 UTC
Red Hat Product Errata RHSA-2026:89750 0 None None None 2026-10-26 03:04:54 UTC
Red Hat Product Errata RHSA-2026:89759 0 None None None 2026-10-26 03:20:11 UTC
Red Hat Product Errata RHSA-2026:90309 0 None None None 2026-10-26 15:42:04 UTC
Red Hat Product Errata RHSA-2026:92352 0 None None None 2026-10-29 13:33:06 UTC
Red Hat Product Errata RHSA-2026:92589 0 None None None 2026-10-29 19:49:43 UTC
Red Hat Product Errata RHSA-2026:93463 0 None None None 2026-11-02 03:32:57 UTC
Red Hat Product Errata RHSA-2026:93473 0 None None None 2026-11-02 03:23:07 UTC
Red Hat Product Errata RHSA-2026:93791 0 None None None 2026-11-02 13:32:56 UTC

Description OSIDB Bzimport 2026-09-05 04:41:22 UTC 
In xmlIO in libxml2 before 2.15.4, an inconsistency in xmlOutputWriteCallback and xmlBufUse causes negative lengths to reach write callbacks, aka a lack of a check for integer overflow before calling writecallback. This has security relevance for many types of uses of that length value within a callback.
Comment 3 Jon Orris 2026-09-24 12:54:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:71586 https://access.redhat.com/errata/RHSA-2026:71586
Comment 4 Jon Orris 2026-09-24 16:02:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:71641 https://access.redhat.com/errata/RHSA-2026:71641
Comment 5 Jon Orris 2026-09-24 16:02:58 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:71641 https://access.redhat.com/errata/RHSA-2026:71641
Comment 6 Jon Orris 2026-09-24 19:00:35 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:71585 https://access.redhat.com/errata/RHSA-2026:71585
Comment 7 Jon Orris 2026-10-26 03:04:52 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:89750 https://access.redhat.com/errata/RHSA-2026:89750
Comment 8 Jon Orris 2026-10-26 03:20:08 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:89759 https://access.redhat.com/errata/RHSA-2026:89759
Comment 9 Jon Orris 2026-10-26 15:42:02 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:90309 https://access.redhat.com/errata/RHSA-2026:90309
Comment 10 Jon Orris 2026-10-27 22:03:21 UTC 
This issue has been addressed in the following products:

  Red Hat OpenShift Container Platform 4.22

Via RHSA-2026:89197 https://access.redhat.com/errata/RHSA-2026:89197
Comment 11 Jon Orris 2026-10-29 13:33:04 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:92352 https://access.redhat.com/errata/RHSA-2026:92352
Comment 12 Jon Orris 2026-10-29 19:49:40 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:92589 https://access.redhat.com/errata/RHSA-2026:92589
Comment 13 Jon Orris 2026-11-02 03:23:04 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:93473 https://access.redhat.com/errata/RHSA-2026:93473
Comment 14 Jon Orris 2026-11-02 03:32:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:93463 https://access.redhat.com/errata/RHSA-2026:93463
Comment 15 Jon Orris 2026-11-02 13:32:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:93791 https://access.redhat.com/errata/RHSA-2026:93791
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