CVE-2026-67298: FreeRDP versions 3.28.0 and earlier contain a heap buffer overflow in the server-side RAIL channel handler (ra

Q: How do I fix CVE-2026-67298?

freerdp: upgrade to 3.29.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-67298 being exploited?

CVE-2026-67298 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-67298 affect?

CVE-2026-67298 affects freerdp. Severity is high (CVSS 7.5). FreeRDP versions 3.28.0 and earlier contain a heap buffer overflow in the server-side RAIL channel handler (rail_server_handle_messages() in channels/rail/server/rail_main.c). When processing a RAIL PDU header, the code subtracts RAIL_PDU_H

Q: How urgent is CVE-2026-67298?

Priority 49/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2026-67298 is a high-severity flaw (CVSS 7.5) affecting freerdp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

FreeRDP versions 3.28.0 and earlier contain a heap buffer overflow in the server-side RAIL channel handler (rail_server_handle_messages() in channels/rail/server/rail_main.c). When processing a RAIL PDU header, the code subtracts RAIL_PDU_HEADER_LENGTH from the peer-controlled orderLength field without first verifying orderLength is at least the header length. For orderLength values 0..3 this causes an unsigned integer underflow to a very large s

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-191
Published	2026-08-01
Last modified	2026-11-03

Publisher (CNA): VulnCheck · Vendor: freerdp

Last updated 2026-11-03 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-08-01 13:16 UTCPublished CVE record published
2026-11-03 21:38 UTCUpdated Record last modified

freerdp freerdp UPGRADE

Affected: < 3.29.0

Fixed in: 3.29.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy freerdp || rpm -q freerdp || freerdp --version

2. UPGRADE to 3.29.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade freerdp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade freerdp

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-67298?

freerdp: upgrade to 3.29.0. Exact commands for each OS are on this page.

Is CVE-2026-67298 being exploited?

CVE-2026-67298 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-67298 affect?

CVE-2026-67298 affects freerdp. Severity is high (CVSS 7.5). FreeRDP versions 3.28.0 and earlier contain a heap buffer overflow in the server-side RAIL channel handler (rail_server_handle_messages() in channels/rail/server/rail_main.c). When processing a RAIL PDU header, the code subtracts RAIL_PDU_H

How urgent is CVE-2026-67298?

Priority 49/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

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References

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