FreeRDP before 3.29.0 Denial of Service via RDPEI PDU
FreeRDP · FreeRDP
8.7HighCVSS 4.0
Recommended action
Within 7 days
High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.
Patch available
Distribution package intelligence
Ubuntu vendor package status
Canonical’s release and source-package findings are shown separately from local repository availability.
2 package states
Repository candidate not checked
A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.
Ubuntu release
Source package
Vendor state
Fixed version
Evidence
Ubuntu 24.04 LTSnoble · esm-apps
freerdp2
Under evaluationCanonical reports that the package might be affected and still needs evaluation or fixing.
Vendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.
Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.
1 current
CVE-2026-67296 · CSAF 2.0 · revision 3 · finalRed Hat Product SecurityFreeRDP: FreeRDP: Denial of Service due to RDPEI message processing
13 known affected
The vendor explicitly identifies these products as affected by this CVE.
freerdp as a component of Red Hat Enterprise Linux 7
freerdp-devel as a component of Red Hat Enterprise Linux 7
freerdp-libs as a component of Red Hat Enterprise Linux 7
freerdp-plugins as a component of Red Hat Enterprise Linux 7
freerdp.src as a component of Red Hat Enterprise Linux 7
libwinpr as a component of Red Hat Enterprise Linux 7
libwinpr-devel as a component of Red Hat Enterprise Linux 7
freerdp as a component of Red Hat Enterprise Linux 9
freerdp-devel as a component of Red Hat Enterprise Linux 9
freerdp-libs as a component of Red Hat Enterprise Linux 9
freerdp.src as a component of Red Hat Enterprise Linux 9
libwinpr as a component of Red Hat Enterprise Linux 9
Summary
A flaw was found in FreeRDP. A remote attacker can exploit a vulnerability in the Remote Desktop Protocol (RDP) Enhanced Input (RDPEI) server channel handler. By sending a malicious RDPEI message with an oversized declared body length, the attacker can force the server to allocate excessive memory, leading to a denial of service (DoS).
Remediation
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Optional official sources
National CERT insights ?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.
Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.
Official European source
ENISA European Vulnerability Database
Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.
1 current
ENISA EUVD identifier
EUVD-2026-51844
No EUVD known-exploited evidence
ENISA has published the identifier mapping but no EUVD description has been stored yet.
EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days
High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.
Patch available
01
What, why and how
FreeRDP before 3.29.0 contains a denial of service vulnerability in the RDPEI server channel handler that fails to validate maximum PDU body length before stream allocation. A malicious RDP client can send a header-only RDPEI message with a large declared body length to force excessive memory allocation on the server.
What
FreeRDP before 3.29.0 contains a denial of service vulnerability in the RDPEI server channel handler that fails to validate maximum PDU body length before stream allocation. A malicious RDP client can send a header-only RDPEI message with a large declared body length to force excessive memory allocation on the server.
Why
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
How
An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.
What
FreeRDP before 3.29.0 contains a denial of service vulnerability in the RDPEI server channel handler that fails to validate maximum PDU body length before stream allocation. A malicious RDP client can send a header-only RDPEI message with a large declared body length to force excessive memory allocation on the server.
Why
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
How
An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.
02
Exploit reality and attack path
CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.
Observed exploitation ?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.No confirmed evidence
No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.
Public PoC / exploit material ?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.Reference recorded
CISA Vulnrichment records proof-of-concept exploitation in its SSVC data. BlackTree has not independently executed or validated exploit material.
Likely attack path
a network path → Improper Input Validation → disrupt the affected service
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Not a CVSS 4.0 base metric
Weakness ?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-20: Improper Input Validation. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
CVSS vector ?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
Common Vulnerability Scoring System 4.0: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.ATNoneAttack requirements: No additional deployment or execution condition is required.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.VCNoneVulnerable-system confidentiality: No direct loss is represented by this metric.VINoneVulnerable-system integrity: No direct loss is represented by this metric.VAHighVulnerable-system availability: A successful attack can cause a major loss.SCNoneSubsequent-system confidentiality: No direct loss is represented by this metric.SINoneSubsequent-system integrity: No direct loss is represented by this metric.SANoneSubsequent-system availability: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedDenial of serviceCWE-20Public exploit reference
A
Official authority intelligence
Only matched European and national findings are included. Language selectors and unavailable sources are omitted.
ENISA EUVD · EUVD-2026-51844Official EUVD mapping
0 linked advisory records.
Official EUVD recordBSI · German · WID-SEC-W-2026-2384FreeRDP: Mehrere Schwachstellen
Ein Angreifer kann mehrere Schwachstellen in FreeRDP ausnutzen, um beliebigen Programmcode auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, Daten zu manipulieren oder einen Denial-of-Service-Zustand auszulösen.
Operational remediation based on structured source evidence.
Status ?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
freerdp as a component of Red Hat Enterprise Linux 7; freerdp-devel as a component of Red Hat Enterprise Linux 7; freerdp-libs as a component of Red Hat Enterprise Linux 7; freerdp-plugins as a component of Red Hat Enterprise Linux 7; freerdp.src as a component of Red Hat Enterprise Linux 7; libwinpr as a component of Red Hat Enterprise Linux 7; libwinpr-devel as a component of Red Hat Enterprise Linux 7; freerdp as a component of Red Hat Enterprise Linux 9; freerdp-devel as a component of Red Hat Enterprise Linux 9; freerdp-libs as a component of Red Hat Enterprise Linux 9; freerdp.src as a component of Red Hat Enterprise Linux 9; libwinpr as a component of Red Hat Enterprise Linux 9; libwinpr-devel as a component of Red Hat Enterprise Linux 9
Fixed
freerdp-2:3.10.3-12.el10_2.10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-2:3.10.3-12.el10_2.10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-2:3.10.3-12.el10_2.10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-2:3.10.3-12.el10_2.10.src as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-2:3.10.3-12.el10_2.10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-debuginfo-2:3.10.3-12.el10_2.10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-debuginfo-2:3.10.3-12.el10_2.10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-debuginfo-2:3.10.3-12.el10_2.10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-debuginfo-2:3.10.3-12.el10_2.10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-debugsource-2:3.10.3-12.el10_2.10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-debugsource-2:3.10.3-12.el10_2.10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-debugsource-2:3.10.3-12.el10_2.10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-debugsource-2:3.10.3-12.el10_2.10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-libs-2:3.10.3-12.el10_2.10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-libs-2:3.10.3-12.el10_2.10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-libs-2:3.10.3-12.el10_2.10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-libs-2:3.10.3-12.el10_2.10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-libs-debuginfo-2:3.10.3-12.el10_2.10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-libs-debuginfo-2:3.10.3-12.el10_2.10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-libs-debuginfo-2:3.10.3-12.el10_2.10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-libs-debuginfo-2:3.10.3-12.el10_2.10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-server-debuginfo-2:3.10.3-12.el10_2.10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-server-debuginfo-2:3.10.3-12.el10_2.10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-server-debuginfo-2:3.10.3-12.el10_2.10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-server-debuginfo-2:3.10.3-12.el10_2.10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libwinpr-2:3.10.3-12.el10_2.10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libwinpr-2:3.10.3-12.el10_2.10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); libwinpr-2:3.10.3-12.el10_2.10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); libwinpr-2:3.10.3-12.el10_2.10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libwinpr-debuginfo-2:3.10.3-12.el10_2.10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); and 35 more
Action
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04
Evidence and provenance
Published 1 Aug 2026 · Last source change 3 Aug 2026, 17:45 UTC · CWE-20 · Improper Input Validation
CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source ?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-51844
Product sourceVendor CSAF · Red Hat Product Security
Remediation sourceVendor CSAF · Red Hat Product Security
CWE sourceCNA
NVD statusNVD awaiting enrichment
Core structured fields are present and their contributing authorities are shown above.
Affected versionsThe structured affected or fixed version information changed.
Before
freerdp as a component of Red Hat Enterprise Linux 10; freerdp-devel as a component of Red Hat Enterprise Linux 10; freerdp-libs as a component of Red Hat Enterprise Linux 10; freerdp-server as a component of Red Hat Enterprise Linux 10; freerdp.src as a component of Red Hat Enterprise Linux 10; libwinpr as a component of Red Hat Enterprise Linux 10; libwinpr-devel as a component of Red Hat Enterprise Linux 10; freerdp as a component of Red Hat Enterprise Linux 7; freerdp-devel as a component of Red Hat Enterprise Linux 7; freerdp-libs as a component of Red Hat Enterprise Linux 7; freerdp-plugins as a component of Red Hat Enterprise Linux 7; freerdp.src as a component of Red Hat Enterprise Linux 7; libwinpr as a component of Red Hat Enterprise Linux 7; libwinpr-devel as a component of Red Hat Enterprise Linux 7; freerdp as a component of Red Hat Enterprise Linux 9; freerdp-devel as a component of Red Hat Enterprise Linux 9; freerdp-libs as a component of Red Hat Enterprise Linux 9; freerdp.src as a component of Red Hat Enterprise Linux 9; libwinpr as a component of Red Hat Enterprise Linux 9; libwinpr-devel as a component of Red Hat Enterprise Linux 9
After
freerdp as a component of Red Hat Enterprise Linux 7; freerdp-devel as a component of Red Hat Enterprise Linux 7; freerdp-libs as a component of Red Hat Enterprise Linux 7; freerdp-plugins as a component of Red Hat Enterprise Linux 7; freerdp.src as a component of Red Hat Enterprise Linux 7; libwinpr as a component of Red Hat Enterprise Linux 7; libwinpr-devel as a component of Red Hat Enterprise Linux 7; freerdp as a component of Red Hat Enterprise Linux 9; freerdp-devel as a component of Red Hat Enterprise Linux 9; freerdp-libs as a component of Red Hat Enterprise Linux 9; freerdp.src as a component of Red Hat Enterprise Linux 9; libwinpr as a component of Red Hat Enterprise Linux 9; libwinpr-devel as a component of Red Hat Enterprise Linux 9 · Fixed: freerdp-2:3.10.3-12.el10_2.10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-2:3.10.3-12.el10_2.10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-2:3.10.3-12.el10_2.10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-2:3.10.3-12.el10_2.10.src as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-2:3.10.3-12.el10_2.10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-debuginfo-2:3.10.3-12.el10_2.10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-debuginfo-2:3.10.3-12.el10_2.10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-debuginfo-2:3.10.3-12.el10_2.10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-debuginfo-2:3.10.3-12.el10_2.10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-debugsource-2:3.10.3-12.el10_2.10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-debugsource-2:3.10.3-12.el10_2.10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-debugsource-2:3.10.3-12.el10_2.10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-debugsource-2:3.10.3-12.el10_2.10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-libs-2:3.10.3-12.el10_2.10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-libs-2:3.10.3-12.el10_2.10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-libs-2:3.10.3-12.el10_2.10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-libs-2:3.10.3-12.el10_2.10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-libs-debuginfo-2:3.10.3-12.el10_2.10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-libs-debuginfo-2:3.10.3-12.el10_2.10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-libs-debuginfo-2:3.10.3-12.el10_2.10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-libs-debuginfo-2:3.10.3-12.el10_2.10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-server-debuginfo-2:3.10.3-12.el10_2.10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-server-debuginfo-2:3.10.3-12.el10_2.10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-server-debuginfo-2:3.10.3-12.el10_2.10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); freerdp-server-debuginfo-2:3.10.3-12.el10_2.10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libwinpr-2:3.10.3-12.el10_2.10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libwinpr-2:3.10.3-12.el10_2.10.ppc64le as a component of Red Hat Enterprise Linux AppStream (v. 10); libwinpr-2:3.10.3-12.el10_2.10.s390x as a component of Red Hat Enterprise Linux AppStream (v. 10); libwinpr-2:3.10.3-12.el10_2.10.x86_64 as a component of Red Hat Enterprise Linux AppStream (v. 10); libwinpr-debuginfo-2:3.10.3-12.el10_2.10.aarch64 as a component of Red Hat Enterprise Linux AppStream (v. 10); and 35 more
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
CVE-2026-67296: FreeRDP before 3.29.0 Denial of Service via RDPEI PDU | BlackTree
