Medium severity · published Oct 13, 2026
CVE-2026-109946
FreeRDP 3.11.0 before 3.32.0 Reachable Assertion via AVC444 Odd Region Width
6.5
CVSS
0.3%
EPSS
No
On KEV
Description
FreeRDP 3.11.0 before 3.32.0 does not validate that AVC444 and AVC444v2 region widths are even before YUV444 conversion, so an odd width reaches an assertion and aborts the client. A malicious or compromised RDP server can terminate a connected FreeRDP client after RDPGFX AVC444 negotiation by sending an in-bounds region rectangle with an odd width.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 25% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
FreeRDP · FreeRDP
3.11.0 before 3.32.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-109946
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-109946
vendor-advisory
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-97pf-pwp3-2wrv
third-party-advisory
https://www.vulncheck.com/advisories/freerdp-3.11.0-before-3.32.0-reachable-assertion-via-avc444-odd-region-width
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