RHSA-2026:6340 - Security Advisory

Topic

An update for freerdp is now available for Red Hat Enterprise Linux 9.

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 heap-use-after-free (CVE-2026-22856)
• freerdp: FreeRDP heap-buffer-overflow (CVE-2026-22854)
• freerdp: FreeRDP heap-buffer-overflow (CVE-2026-22852)
• freerdp: FreeRDP: Denial of Service via FastGlyph parsing buffer overflow (CVE-2026-23732)
• freerdp: FreeRDP: Denial of Service via use-after-free in AUDIN format renegotiation (CVE-2026-24676)
• freerdp: FreeRDP has a heap-use-after-free in video_timer (CVE-2026-24491)
• freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2() (CVE-2026-23948)
• freerdp: FreeRDP has a Heap-use-after-free in play_thread (CVE-2026-24684)
• freerdp: FreeRDP has a heap-use-after-free in urb_bulk_transfer_cb (CVE-2026-24681)
• freerdp: FreeRDP has a heap-use-after-free in ainput_send_input_event (CVE-2026-24683)
• freerdp: FreeRDP has a heap-buffer-overflow in urb_select_interface (CVE-2026-24679)
• freerdp: FreeRDP has a Heap-use-after-free in urb_select_interface (CVE-2026-24675)
• freerdp: FreeRDP: Arbitrary code execution via crafted Remote Desktop Protocol (RDP) server messages (CVE-2026-31806)

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 9 x86_64
• Red Hat Enterprise Linux for IBM z Systems 9 s390x
• Red Hat Enterprise Linux for Power, little endian 9 ppc64le
• Red Hat Enterprise Linux for ARM 64 9 aarch64
• Red Hat CodeReady Linux Builder for x86_64 9 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 9 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 9 aarch64
• Red Hat CodeReady Linux Builder for IBM z Systems 9 s390x

Fixes

• BZ - 2429650 - CVE-2026-22856 freerdp: FreeRDP heap-use-after-free
• BZ - 2429652 - CVE-2026-22854 freerdp: FreeRDP heap-buffer-overflow
• BZ - 2429654 - CVE-2026-22852 freerdp: FreeRDP heap-buffer-overflow
• BZ - 2430881 - CVE-2026-23732 freerdp: FreeRDP: Denial of Service via FastGlyph parsing buffer overflow
• BZ - 2438201 - CVE-2026-24676 freerdp: FreeRDP: Denial of Service via use-after-free in AUDIN format renegotiation
• BZ - 2438202 - CVE-2026-24491 freerdp: FreeRDP has a heap-use-after-free in video_timer
• BZ - 2438207 - CVE-2026-23948 freerdp: FreeRDP has a NULL Pointer Dereference in rdp_write_logon_info_v2()
• BZ - 2438208 - CVE-2026-24684 freerdp: FreeRDP has a Heap-use-after-free in play_thread
• BZ - 2438210 - CVE-2026-24681 freerdp: FreeRDP has a heap-use-after-free in urb_bulk_transfer_cb
• BZ - 2438216 - CVE-2026-24683 freerdp: FreeRDP has a heap-use-after-free in ainput_send_input_event
• BZ - 2438217 - CVE-2026-24679 freerdp: FreeRDP has a heap-buffer-overflow in urb_select_interface
• BZ - 2438221 - CVE-2026-24675 freerdp: FreeRDP has a Heap-use-after-free in urb_select_interface
• BZ - 2447376 - CVE-2026-31806 freerdp: FreeRDP: Arbitrary code execution via crafted Remote Desktop Protocol (RDP) server messages

CVEs

• CVE-2026-22852
• CVE-2026-22854
• CVE-2026-22856
• CVE-2026-23732
• CVE-2026-23948
• CVE-2026-24491
• CVE-2026-24675
• CVE-2026-24676
• CVE-2026-24679
• CVE-2026-24681
• CVE-2026-24683
• CVE-2026-24684
• CVE-2026-31806

References

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