RHSA-2026:36203 - Security Advisory

Topic

An update for freerdp is now available for Red Hat Enterprise Linux 10.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.

Security Fix(es):

• freerdp: FreeRDP: Remote code execution via heap-buffer-overflow in gdi_CacheToSurface (CVE-2026-40033)
• freerdp: FreeRDP: Arbitrary code execution or denial of service via heap use-after-free in RDPEAR NDR parser (CVE-2026-44422)
• freerdp: FreeRDP: Out-of-bounds write in planar bitmap decoder allows arbitrary code execution (CVE-2026-45700)
• freerdp: FreeRDP: Arbitrary code execution via crafted RDPGFX PDUs (CVE-2026-44421)
• freerdp: FreeRDP: Arbitrary code execution and denial of service via heap-buffer-overflow (CVE-2026-44420)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for x86_64 10 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Update Support 10.2 x86_64
• Red Hat Enterprise Linux for IBM z Systems 10 s390x
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 10.2 s390x
• Red Hat Enterprise Linux for Power, little endian 10 ppc64le
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 10.2 ppc64le
• Red Hat Enterprise Linux for ARM 64 10 aarch64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 10.2 aarch64
• Red Hat CodeReady Linux Builder for x86_64 10 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 10 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 10 aarch64
• Red Hat CodeReady Linux Builder for IBM z Systems 10 s390x
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 10.2 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 10.2 ppc64le
• Red Hat CodeReady Linux Builder for IBM z Systems - Extended Update Support 10.2 s390x
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 10.2 aarch64
• Red Hat Enterprise Linux for ARM 64 - 4 years of updates 10.2 aarch64
• Red Hat Enterprise Linux for IBM z Systems - 4 years of updates 10.2 s390x
• Red Hat Enterprise Linux for Power, little endian - 4 years of support 10.2 ppc64le
• Red Hat Enterprise Linux for x86_64 - 4 years of updates 10.2 x86_64
• Red Hat Enterprise Linux for x86_64 - Extended Life Cycle 10.2 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Life Cycle 10.2 aarch64
• Red Hat Enterprise Linux for Power, little endian - Extended Life Cycle 10.2 ppc64le
• Red Hat Enterprise Linux for IBM z Systems - Extended Life Cycle 10.2 s390x

Fixes

• BZ - 2481473 - CVE-2026-40033 freerdp: FreeRDP: Remote code execution via heap-buffer-overflow in gdi_CacheToSurface
• BZ - 2483467 - CVE-2026-44422 freerdp: FreeRDP: Arbitrary code execution or denial of service via heap use-after-free in RDPEAR NDR parser
• BZ - 2483470 - CVE-2026-45700 freerdp: FreeRDP: Out-of-bounds write in planar bitmap decoder allows arbitrary code execution
• BZ - 2483471 - CVE-2026-44421 freerdp: FreeRDP: Arbitrary code execution via crafted RDPGFX PDUs
• BZ - 2483480 - CVE-2026-44420 freerdp: FreeRDP: Arbitrary code execution and denial of service via heap-buffer-overflow

CVEs

• CVE-2026-40033
• CVE-2026-44420
• CVE-2026-44421
• CVE-2026-44422
• CVE-2026-45700

References

• https://access.redhat.com/security/updates/classification/#important