CVE-2025-4478: freerdp Null Dereference — Fix

Description

A flaw was found in the FreeRDP used by Anaconda's remote install feature, where a crafted RDP packet could trigger a segmentation fault. This issue causes the service to crash and remain defunct, resulting in a denial of service. It occurs pre-boot and is likely due to a NULL pointer dereference. Rebooting is required to recover the system.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
freerdp	freerdp	3.0.0 — 3.16.0
redhat	enterprise_linux	All

References

Advisories & Patches

https://access.redhat.com/errata/RHSA-2025:9307 https://access.redhat.com/security/cve/CVE-2025-4478 https://github.com/FreeRDP/FreeRDP/pull/11573

Other References

https://bugzilla.redhat.com/show_bug.cgi?id=2365232

Frequently Asked Questions

What is CVE-2025-4478? +

A flaw was found in the FreeRDP used by Anaconda's remote install feature, where a crafted RDP packet could trigger a segmentation fault. This issue causes the service to crash and remain defunct, resulting in a denial of service. It occurs pre-boot and is likely due to a NULL pointer dereference. Rebooting is required to recover the system. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2025-4478? +

CVE-2025-4478 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-4478? +

CVE-2025-4478 affects products from freerdp, redhat, specifically: enterprise_linux, freerdp. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-4478? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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