Bug 2533911 (CVE-2026-91964) - CVE-2026-91964 FreeRDP: FreeRDP: Remote code execution via heap buffer overflow in Server Redirection PDU
Summary: CVE-2026-91964 FreeRDP: FreeRDP: Remote code execution via heap buffer overfl...
Keywords:
Status: NEW
Alias: CVE-2026-91964
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2534097 2534099
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-15 15:48 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 04:23:16 UTC
Red Hat Product Errata RHSA-2026:76747 0 None None None 2026-10-06 14:28:26 UTC
Red Hat Product Errata RHSA-2026:76755 0 None None None 2026-10-08 06:53:04 UTC
Red Hat Product Errata RHSA-2026:93537 0 None None None 2026-11-02 04:58:16 UTC
Red Hat Product Errata RHSA-2026:93538 0 None None None 2026-11-02 04:42:14 UTC
Red Hat Product Errata RHSA-2026:93549 0 None None None 2026-11-02 05:57:06 UTC
Red Hat Product Errata RHSA-2026:93559 0 None None None 2026-11-02 07:42:09 UTC
Red Hat Product Errata RHSA-2026:98469 0 None None None 2026-11-11 11:58:15 UTC
Red Hat Product Errata RHSA-2026:98598 0 None None None 2026-11-11 11:27:49 UTC
Red Hat Product Errata RHSA-2026:99034 0 None None None 2026-11-11 16:54:46 UTC
Red Hat Product Errata RHSA-2026:99035 0 None None None 2026-11-11 17:03:37 UTC
Red Hat Product Errata RHSA-2026:99516 0 None None None 2026-11-12 06:30:59 UTC

Description OSIDB Bzimport 2026-09-15 15:48:43 UTC 
FreeRDP versions before 3.31.0 contain a heap-based buffer overflow in nego_send_negotiation_request when processing Server Redirection PDU messages with attacker-controlled LoadBalanceInfo fields. A malicious RDP server can trigger the overflow by sending an arbitrary-length field that gets written to a fixed 512-byte buffer without validation, causing client crashes or potential code execution when chained with memory disclosure.
Comment 1 Jon Orris 2026-10-05 04:23:15 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 2026-10-06 14:28:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:76747 https://access.redhat.com/errata/RHSA-2026:76747
Comment 3 Jon Orris 2026-10-06 14:28:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:76747 https://access.redhat.com/errata/RHSA-2026:76747
Comment 4 Jon Orris 2026-10-08 06:53:04 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:76755 https://access.redhat.com/errata/RHSA-2026:76755
Comment 5 Jon Orris 2026-11-02 04:42:13 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-2026:93538 https://access.redhat.com/errata/RHSA-2026:93538
Comment 6 Jon Orris 2026-11-02 04:58:15 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-2026:93537 https://access.redhat.com/errata/RHSA-2026:93537
Comment 7 Jon Orris 2026-11-02 05:57:05 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-2026:93549 https://access.redhat.com/errata/RHSA-2026:93549
Comment 8 Jon Orris 2026-11-02 07:42:08 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 10 errata-xmlrpc 2026-11-11 11:27:47 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 11 errata-xmlrpc 2026-11-11 11:58:13 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:98469 https://access.redhat.com/errata/RHSA-2026:98469
Comment 12 errata-xmlrpc 2026-11-11 16:54:45 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:99034 https://access.redhat.com/errata/RHSA-2026:99034
Comment 13 errata-xmlrpc 2026-11-11 17:03:36 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:99035 https://access.redhat.com/errata/RHSA-2026:99035
Comment 14 errata-xmlrpc 2026-11-12 06:30:58 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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