CVE-2026-22853
CRITICALFreeRDP < 3.20.1 - Heap Buffer Overflow in RDPEAR NDR Array Reader
Title source: llmDescription
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, RDPEAR’s NDR array reader does not perform bounds checking on the on‑wire element count and can write past the heap buffer allocated from hints, causing a heap buffer overflow in ndr_read_uint8Array. This vulnerability is fixed in 3.20.1.
References (8)
Core 8
Core References
Exploit, Vendor Advisory x_refsource_confirm
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-47v9-p4gp-w5ch
Release Notes x_refsource_misc
https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:19033
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:3068
Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:4121
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-22853
Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2429647
Scores
CVSS v3
9.8
EPSS
0.0066
EPSS Percentile
47.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-787
Status
published
Products (2)
freerdp/freerdp
< 3.20.1
FreeRDP/FreeRDP
< 3.20.1
Published
Jan 14, 2026
Tracked Since
Feb 18, 2026