RHSA-2026:98598 - 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 Critical. 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-proxy: FreeRDP: Information disclosure via uninitialized heap memory in Save Session Info PDU (CVE-2026-85089)
• FreeRDP: FreeRDP: Arbitrary code execution via oversized channel messages in SHOW_PROTOCOL (CVE-2026-91948)
• FreeRDP: FreeRDP: Denial of Service via crafted Surface Bits command (CVE-2026-91954)
• FreeRDP: FreeRDP: Remote code execution via heap buffer overflow in Server Redirection PDU (CVE-2026-91964)
• FreeRDP: FreeRDP: Information Disclosure via RDPGFX ResetGraphics PDU (CVE-2026-91946)
• freerdp: FreeRDP 3.0.0 through 3.30.0 Protocol Negotiation Bypass (CVE-2026-91949)
• FreeRDP: FreeRDP: Denial of Service via out-of-bounds read in URBDRC channel (CVE-2026-91956)
• FreeRDP: FreeRDP: Denial of Service via out-of-bounds write in urbdrc client channel (CVE-2026-91951)
• FreeRDP: FreeRDP: Remote code execution via uninitialized heap memory disclosure (CVE-2026-91963)
• FreeRDP: FreeRDP: Use-after-free vulnerability in DRDYNVC parser leads to memory corruption (CVE-2026-91947)
• FreeRDP: FreeRDP: Denial of Service due to buffer over-read in RPC gateway (CVE-2026-91959)
• FreeRDP: FreeRDP: Out-of-bounds read leads to denial of service or information disclosure (CVE-2026-91950)
• FreeRDP: FreeRDP: Denial of Service via integer overflow and double free in WinPR (CVE-2026-91960)
• FreeRDP: FreeRDP: Heap buffer overflow via oversized LB_LOAD_BALANCE_INFO routing token can lead to heap corruption. (CVE-2026-91953)
• FreeRDP: FreeRDP: Denial of Service due to out-of-bounds read in smartcard response processing (CVE-2026-91945)
• freerdp: FreeRDP: Denial of Service via uninitialized progressive tile handling (CVE-2026-109242)
• freerdp: FreeRDP 3.0.0-beta1 before 3.32.0 Use-After-Free via Smartcard Connect (CVE-2026-109676)
• freerdp: FreeRDP: Unauthenticated keystroke injection via premature input dispatch (CVE-2026-110838)
• freerdp: freerdp: Denial of Service via file descriptor exhaustion in serial device handling (CVE-2026-110830)
• freerdp: freerdp: Denial of Service via heap-based buffer overflow during MP3 audio decoding (CVE-2026-110837)
• freerdp: freerdp: Denial of Service via unbounded memory consumption during RDPDR reassembly (CVE-2026-110833)
• freerdp: FreeRDP: Denial of Service via grayscale JPEG clipboard conversion (CVE-2026-110839)
• freerdp: freerdp: Denial of Service via memory exhaustion in NLA frame parser (CVE-2026-111378)
• freerdp: FreeRDP: Arbitrary code execution via crafted persistent cache file (CVE-2026-111379)
• freerdp: freerdp: Arbitrary code execution via crafted persistent cache file (CVE-2026-111381)
• freerdp: freerdp: Arbitrary code execution via crafted display frames (CVE-2026-111382)
• freerdp: freerdp: Denial of Service via heap out-of-bounds write in NTLM authentication (CVE-2026-111880)
• freerdp: FreeRDP: heap buffer overflow in server rdpsnd via crafted audio formats (CVE-2026-114045)
• freerdp: FreeRDP: Denial of Service via malformed image clipboard payloads (CVE-2026-121386)
• freerdp: freerdp: Denial of Service via zero-width graphics reset (CVE-2026-121402)
• freerdp: freerdp: Denial of Service via zero-length dynamic virtual channel messages (CVE-2026-121404)
• freerdp: freerdp: Denial of Service via uncontrolled memory allocation in dynamic virtual channels (CVE-2026-121388)
• freerdp: FreeRDP: Denial of Service via assertion failure in RemoteFX decoder (CVE-2026-121394)

Bug Fix(es) and Enhancement(s):

• Rebase FreeRDP to 3.32.2 or newer [rhel-10.3.z] (JIRA:RHEL-277443)

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 IBM z Systems 10 s390x
• Red Hat Enterprise Linux for Power, little endian 10 ppc64le
• Red Hat Enterprise Linux for ARM 64 10 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

Fixes

• BZ - 2527811 - CVE-2026-85089 FreeRDP: freerdp-proxy: FreeRDP: Information disclosure via uninitialized heap memory in Save Session Info PDU
• BZ - 2533904 - CVE-2026-91948 FreeRDP: FreeRDP: Arbitrary code execution via oversized channel messages in SHOW_PROTOCOL
• BZ - 2533906 - CVE-2026-91954 FreeRDP: FreeRDP: Denial of Service via crafted Surface Bits command
• BZ - 2533911 - CVE-2026-91964 FreeRDP: FreeRDP: Remote code execution via heap buffer overflow in Server Redirection PDU
• BZ - 2533913 - CVE-2026-91946 FreeRDP: FreeRDP: Information Disclosure via RDPGFX ResetGraphics PDU
• BZ - 2533925 - CVE-2026-91949 freerdp: FreeRDP 3.0.0 through 3.30.0 Protocol Negotiation Bypass
• BZ - 2533927 - CVE-2026-91956 FreeRDP: FreeRDP: Denial of Service via out-of-bounds read in URBDRC channel
• BZ - 2533928 - CVE-2026-91951 FreeRDP: FreeRDP: Denial of Service via out-of-bounds write in urbdrc client channel
• BZ - 2533930 - CVE-2026-91963 FreeRDP: FreeRDP: Remote code execution via uninitialized heap memory disclosure
• BZ - 2533942 - CVE-2026-91947 FreeRDP: FreeRDP: Use-after-free vulnerability in DRDYNVC parser leads to memory corruption
• BZ - 2533951 - CVE-2026-91959 FreeRDP: FreeRDP: Denial of Service due to buffer over-read in RPC gateway
• BZ - 2533954 - CVE-2026-91950 FreeRDP: FreeRDP: Out-of-bounds read leads to denial of service or information disclosure
• BZ - 2533957 - CVE-2026-91960 FreeRDP: FreeRDP: Denial of Service via integer overflow and double free in WinPR
• BZ - 2533959 - CVE-2026-91953 FreeRDP: FreeRDP: Heap buffer overflow via oversized LB_LOAD_BALANCE_INFO routing token can lead to heap corruption.
• BZ - 2533965 - CVE-2026-91945 FreeRDP: FreeRDP: Denial of Service due to out-of-bounds read in smartcard response processing
• BZ - 2549790 - CVE-2026-109242 freerdp: FreeRDP: Denial of Service via uninitialized progressive tile handling
• BZ - 2550539 - CVE-2026-109676 freerdp: FreeRDP 3.0.0-beta1 before 3.32.0 Use-After-Free via Smartcard Connect
• BZ - 2552961 - CVE-2026-110838 freerdp: FreeRDP: Unauthenticated keystroke injection via premature input dispatch
• BZ - 2552970 - CVE-2026-110830 freerdp: freerdp: Denial of Service via file descriptor exhaustion in serial device handling
• BZ - 2552978 - CVE-2026-110837 freerdp: freerdp: Denial of Service via heap-based buffer overflow during MP3 audio decoding
• BZ - 2552988 - CVE-2026-110833 freerdp: freerdp: Denial of Service via unbounded memory consumption during RDPDR reassembly
• BZ - 2552996 - CVE-2026-110839 freerdp: FreeRDP: Denial of Service via grayscale JPEG clipboard conversion
• BZ - 2553907 - CVE-2026-111378 freerdp: freerdp: Denial of Service via memory exhaustion in NLA frame parser
• BZ - 2553911 - CVE-2026-111379 freerdp: FreeRDP: Arbitrary code execution via crafted persistent cache file
• BZ - 2553917 - CVE-2026-111381 freerdp: freerdp: Arbitrary code execution via crafted persistent cache file
• BZ - 2553920 - CVE-2026-111382 freerdp: freerdp: Arbitrary code execution via crafted display frames
• BZ - 2554625 - CVE-2026-111880 freerdp: freerdp: Denial of Service via heap out-of-bounds write in NTLM authentication
• BZ - 2557974 - CVE-2026-114045 freerdp: FreeRDP: heap buffer overflow in server rdpsnd via crafted audio formats
• BZ - 2565870 - CVE-2026-121386 freerdp: FreeRDP: Denial of Service via malformed image clipboard payloads
• BZ - 2565949 - CVE-2026-121402 freerdp: freerdp: Denial of Service via zero-width graphics reset
• BZ - 2565951 - CVE-2026-121404 freerdp: freerdp: Denial of Service via zero-length dynamic virtual channel messages
• BZ - 2565959 - CVE-2026-121388 freerdp: freerdp: Denial of Service via uncontrolled memory allocation in dynamic virtual channels
• BZ - 2565962 - CVE-2026-121394 freerdp: FreeRDP: Denial of Service via assertion failure in RemoteFX decoder

CVEs

• CVE-2026-85089
• CVE-2026-91945
• CVE-2026-91946
• CVE-2026-91947
• CVE-2026-91948
• CVE-2026-91949
• CVE-2026-91950
• CVE-2026-91951
• CVE-2026-91953
• CVE-2026-91954
• CVE-2026-91956
• CVE-2026-91959
• CVE-2026-91960
• CVE-2026-91963
• CVE-2026-91964
• CVE-2026-109242
• CVE-2026-109676
• CVE-2026-110830
• CVE-2026-110833
• CVE-2026-110837
• CVE-2026-110838
• CVE-2026-110839
• CVE-2026-111378
• CVE-2026-111379
• CVE-2026-111381
• CVE-2026-111382
• CVE-2026-111880
• CVE-2026-114045
• CVE-2026-121386
• CVE-2026-121388
• CVE-2026-121394
• CVE-2026-121402
• CVE-2026-121404

References

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