Bug 2533942 (CVE-2026-91947) - CVE-2026-91947 FreeRDP: FreeRDP: Use-after-free vulnerability in DRDYNVC parser leads to memory corruption
Summary: CVE-2026-91947 FreeRDP: FreeRDP: Use-after-free vulnerability in DRDYNVC pars...
Keywords:
Status: NEW
Alias: CVE-2026-91947
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2534065 2534066
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-15 15:52 UTC by OSIDB Bzimport
Modified: 2026-11-12 06:31 UTC (History)
2 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 RHSA-2026:75570 0 None None None 2026-10-05 04:23:25 UTC
Red Hat Product Errata RHSA-2026:93559 0 None None None 2026-11-02 07:42:14 UTC
Red Hat Product Errata RHSA-2026:98598 0 None None None 2026-11-11 11:28:04 UTC
Red Hat Product Errata RHSA-2026:99516 0 None None None 2026-11-12 06:31:04 UTC

Description OSIDB Bzimport 2026-09-15 15:52:07 UTC 
FreeRDP server versions before 3.31.0 contain a use-after-free vulnerability in the DRDYNVC parser that dereferences a channel pointer after releasing the synchronization lock. Authenticated clients can race AUDIN channel closure messages against DRDYNVC data parsing to trigger heap-use-after-free when accessing freed channel objects.
Comment 1 Jon Orris 2026-10-05 04:23:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:75570 https://access.redhat.com/errata/RHSA-2026:75570
Comment 2 Jon Orris 2026-11-02 07:42:13 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7 Extended Lifecycle Support

Via RHSA-2026:93559 https://access.redhat.com/errata/RHSA-2026:93559
Comment 4 errata-xmlrpc 2026-11-11 11:28:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:98598 https://access.redhat.com/errata/RHSA-2026:98598
Comment 5 errata-xmlrpc 2026-11-12 06:31:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:99516 https://access.redhat.com/errata/RHSA-2026:99516
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