RHSA-2026:97219: Moderate: freerdp security, bug fix, and enhancement update
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: Denial of Service via endless blocking loop in StreamEnsureCapacity (CVE-2026-27951) Bug Fix(es) and Enhancement(s): Update freerdp to the latest upstream stable release (JIRA:RHEL-80426) FreeRDP does not create context for hostnames longer than 31 characters (JIRA:RHEL-143809) SSL warnings under FIPS (JIRA:RHEL-140202) [RFE] Add RDP Smart Card Redirection Support (MS?RDPESC) to Enable Remote (Virtualized) SmartCard?Based PKINIT Authentication (JIRA:RHEL-171999) 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.Additional Changes:For detailed information on changes in this release, see the Red Hat Enterprise Linux 10 Release Notes linked from the References section.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
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redhat/freerdpto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3 - Upgrade
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redhat/freerdp-debuginfoto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3 - Upgrade
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redhat/freerdp-debugsourceto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3 - Upgrade
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redhat/freerdp-libsto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3 - Upgrade
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redhat/freerdp-libs-debuginfoto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3 - Upgrade
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redhat/freerdp-server-debuginfoto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3 - Upgrade
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redhat/libwinprto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3 - Upgrade
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redhat/libwinpr-debuginfoto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3 - Upgrade
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redhat/freerdpto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3.aa - Upgrade
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redhat/freerdp-debuginfoto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3.aa - Upgrade
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redhat/freerdp-debugsourceto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3.aa - Upgrade
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redhat/freerdp-libsto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3.aa - Upgrade
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redhat/freerdp-libs-debuginfoto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3.aa - Upgrade
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redhat/freerdp-server-debuginfoto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3.aa - Upgrade
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redhat/libwinprto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3.aa - Upgrade
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redhat/libwinpr-debuginfoto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3.aa - Upgrade
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redhat/freerdp-develto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3 - Upgrade
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redhat/freerdp-serverto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3 - Upgrade
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redhat/libwinpr-develto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3 - Upgrade
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redhat/freerdp-develto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3.aa - Upgrade
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redhat/freerdp-serverto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3.aa - Upgrade
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redhat/libwinpr-develto a version that resolves this vulnerability.Fixed in 3.28.0-4.el10_3.aa
Event History
Frequently Asked Questions
Which component is affected by the denial-of-service issue?
The issue is identified in FreeRDP's Stream_EnsureCapacity function. The advisory describes the impact as a denial of service caused by an endless blocking loop.
What systems may be exposed to this issue?
Systems using the FreeRDP implementation, including the xfreerdp client, may be exposed. The client is used to connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.
Are there related non-security changes in this update?
Yes. The update includes the latest upstream stable FreeRDP release, a fix for hostnames longer than 31 characters, SSL warning changes under FIPS, and RDP Smart Card Redirection support.