Bug 2533906 (CVE-2026-91954) - CVE-2026-91954 FreeRDP: FreeRDP: Denial of Service via crafted Surface Bits command
Summary: CVE-2026-91954 FreeRDP: FreeRDP: Denial of Service via crafted Surface Bits c...
Keywords:
Status: NEW
Alias: CVE-2026-91954
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: 2534074 2534075
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-15 15:47 UTC by OSIDB Bzimport
Modified: 2026-11-02 07:42 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 04:23:13 UTC
Red Hat Product Errata RHSA-2026:76747 0 None None None 2026-10-06 14:28:23 UTC
Red Hat Product Errata RHSA-2026:76755 0 None None None 2026-10-08 06:53:03 UTC
Red Hat Product Errata RHSA-2026:93537 0 None None None 2026-11-02 04:58:15 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 07:42:08 UTC

Description OSIDB Bzimport 2026-09-15 15:47:01 UTC 
FreeRDP before 3.31.0 contains a null pointer dereference vulnerability in gdi_surface_bits when processing Surface Bits commands with NSCodec codec ID. A malicious RDP server can crash a FreeRDP client by sending a crafted Surface Bits command claiming to use NSCodec, even when the codec is disabled.
Comment 1 Jon Orris 2026-10-05 04:23:12 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 14:28:23 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 2026-10-08 06:53:02 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 4 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 5 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 6 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 7 Jon Orris 2026-11-02 07:42:07 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
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