CVE-2026-23530VulnerabilityPublished 23 Feb 2026Updated 30 Jun 2026

Red Hat Security Advisory: freerdp security update

Affects Red Hat freerdpSource GCVE Database

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Mentioned vulnerabilities

Not known to be exploited : upgrade the Red Hat redhat/freerdp package to 8.8.1 soon.

Data as of 30 Oct 2026, 11:52 UTC

Severity

High

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.5% chance of exploitation in 30 days – higher than 44% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 8.8.1

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Feb 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade the Red Hat redhat/freerdp package to 8.8.1.

Affected software

Product	Affected	Fixed in
Red Hatredhat/freerdp`pkg:rpm/redhat/freerdp`Other threats	Affected <8.8.1	Fixed in 8.8.1

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Red Hat has released updated freerdp packages for Red Hat Enterprise Linux 8.8 and related update services that address these vulnerabilities. Users should apply the security update RHSA-2026:3041 promptly to remediate the issues. For detailed instructions on applying the update, refer to https://access.redhat.com/articles/11258. No additional mitigation steps are indicated by the vendor advisory.

Description

Multiple heap buffer overflow and use-after-free vulnerabilities have been identified in FreeRDP, a free implementation of the Remote Desktop Protocol client. These vulnerabilities can lead to denial of service and potential code execution when connecting to malicious RDP servers. The issues affect the xfreerdp client and involve crafted RDPGFX surface updates and client-side heap buffer overflows. Red Hat has released security updates addressing these vulnerabilities in Red Hat Enterprise Linux 8.8 variants.

Impact

Successful exploitation of these vulnerabilities may allow a malicious RDP server to cause a denial of service or execute arbitrary code on the client system running FreeRDP. This could compromise the confidentiality, integrity, and availability of the affected system. The vulnerabilities impact the client side of RDP connections, making users connecting to untrusted or malicious servers at risk.

Summary

This advisory covers five security vulnerabilities in FreeRDP (CVE-2026-23530, CVE-2026-23531, CVE-2026-23532, CVE-2026-23533, and CVE-2026-23884) involving heap buffer overflows and a use-after-free condition. These flaws can be triggered by a malicious RDP server, potentially causing denial of service or arbitrary code execution on the client side. The vulnerabilities affect the xfreerdp client used to connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox. Red Hat has issued updated packages for affected Red Hat Enterprise Linux 8.8 variants to remediate these issues.

CWE-122Heap-based Buffer Overflow (opens in a new tab)
Variant weaknessLikelihood of exploit: HighCWE Top 25 (2025): #16
The product writes past the end of a buffer that was allocated on the heap.
Pre-design: Use a language or compiler that performs automatic bounds checking.
Architecture and Design
Use an abstraction library to abstract away risky APIs. Not a complete solution.
Operation · Build and Compilation · Environment Hardening
Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index…
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
Attack patterns
Forced Integer Overflow (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-416Use After Free (opens in a new tab)
Variant weaknessLikelihood of exploit: HighCWE Top 25 (2025): #7
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
Architecture and Design · Language Selection
Choose a language that provides automatic memory management.
Implementation · Attack Surface Reduction
When freeing pointers, be sure to set them to NULL once they are freed. However, the utilization of multiple or complex data structures may lower the usefulness of this strategy.
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 27 Jun 2026, 23:48 UTC

WeaknessesCWE-122, CWE-416

Technical details

References

Community reviews

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