High severity · published Oct 16, 2026
CVE-2026-111382
FreeRDP before 3.32.0 Heap Out-of-Bounds Write in AVC444 YUV444 Combine
8.8
CVSS
0.4%
EPSS
No
On KEV
Description
FreeRDP before 3.32.0 contains a client-side heap out-of-bounds write vulnerability in general_LumaToYUV444 and general_ChromaV2ToYUV444 that allows malicious RDP servers to corrupt client memory. Attackers can send RDPGFX AVC444 or AVC444v2 frames with odd-height region rects ending at surface height to write past U/V planes, enabling heap corruption and potential code execution.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
FreeRDP · FreeRDP
before 3.32.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-111382
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-111382
Exploit
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-f4pf-pgp4-f2r3
Third Party Advisory
https://www.vulncheck.com/advisories/freerdp-before-3.32.0-heap-out-of-bounds-write-in-avc444-yuv444-combine
More from FreeRDP
9.8
CVE-2026-63633
FreeRDP: Heap buffer overflow in Opus audio decode (`freerdp_dsp_decode_opus` resizes the wrong stream) — server→client
9.8
CVE-2026-55194
FreeRDPHeap-buffer-overflow write in TS Gateway RPC RESPONSE reassembly due to alloc_hint capacity mismatch
9.8
CVE-2026-55191
FreeRDP: Heap-buffer-overflow write in AVC444 YUV buffer allocation
9.8
CVE-2026-66402
FreeRDP before 3.29.0 TLS Certificate Identity Validation Bypass
9.8
CVE-2026-57156
FreeRDP: Integer overflow leading to heap buffer overflow in Orders Delta Points parsing