CVE-2026-22856 — Race Condition in Freerdp

CWE-362 — Race ConditionCWE-416 — Use After Free7 documents7 sources
Severity
6.8MEDIUMNVD
EPSS
0.1%
top 79.40%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
FreerdpDebian Freerdp2Debian Freerdp3
Timeline
PublishedJan 14
Latest updateMar 18

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a race in the serial channel IRP thread tracking allows a heap use‑after‑free when one thread removes an entry from serial->IrpThreads while another reads it. This vulnerability is fixed in 3.20.1.

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Affected Packages3 packages

▶NVDfreerdp/freerdp< 3.20.1
▶debiandebian/freerdp2< freerdp3 3.20.2+dfsg-1 (forky)
▶debiandebian/freerdp3< freerdp3 3.20.2+dfsg-1 (forky)

Patches

Patch: github.com ↗

🔴Vulnerability Details

1
OSV
CVE-2026-22856: FreeRDP is a free implementation of the Remote Desktop Protocol↗2026-01-14
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📋Vendor Advisories

3
Ubuntu
FreeRDP vulnerabilities↗2026-03-18
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Red Hat
freerdp: FreeRDP heap-use-after-free↗2026-01-14
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Debian
CVE-2026-22856: freerdp2 - FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-22856 Impact, Exploitability, and Mitigation Steps | Wiz↗
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💬Community

1
Bugzilla
CVE-2026-22856 freerdp: FreeRDP heap-use-after-free↗2026-01-14
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