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CVE-2026-110839— FreeRDP 3.3.0 before 3.32.0 Heap Out-of-Bounds Write via Grayscale JPEG Clipboard Data

Quick assessment

Affected
FreeRDP FreeRDP
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FreeRDP 3.3.0 before 3.32.0, when built with WINPR_UTILS_IMAGE_JPEG=ON, has a heap-based out-of-bounds write in winpr_convert_from_jpeg because grayscale JPEG buffers are sized from one input component rather than three BGR output components. A malicious RDP s

CVSS 7.1 · High
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I. Basic Information for CVE-2026-110839

Vulnerability Information

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Vulnerability Title
FreeRDP 3.3.0 before 3.32.0 Heap Out-of-Bounds Write via Grayscale JPEG Clipboard Data
Source: CVE Program / CVE List V5
Vulnerability Description
FreeRDP 3.3.0 before 3.32.0, when built with WINPR_UTILS_IMAGE_JPEG=ON, has a heap-based out-of-bounds write in winpr_convert_from_jpeg because grayscale JPEG buffers are sized from one input component rather than three BGR output components. A malicious RDP server can offer a grayscale JPEG via clipboard redirection, corrupting client memory and crashing it when the item is pasted as CF_DIB bitmap data.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreeRDP FreeRDP 3.3.0 ~ 3.32.0 -

II. Public POCs for CVE-2026-110839

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III. Intelligence Information for CVE-2026-110839

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Other References for CVE-2026-110839 (2)

Same Patch Batch · FreeRDP · 2026-10-14 · 11 CVEs total

CVE-2026-110838 7.5 HIGH FreeRDP shadow before 3.32.0 Pre-Authentication Input Injection via Confirm Active bypass
CVE-2026-110837 7.1 HIGH FreeRDP 2.0.0 before 3.32.0 Heap Buffer Overflow via MP3 Audio Decoding
CVE-2026-110829 6.5 MEDIUM FreeRDP 3.0.0 before 3.32.0 Null Pointer Dereference via rdpsnd Fragment
CVE-2026-110836 6.5 MEDIUM FreeRDP 3.0.0 before 3.32.0 Infinite Loop DoS via Gateway Content-Type
CVE-2026-110834 6.5 MEDIUM FreeRDP 2.0.0 before 3.32.0 Denial of Service via Serial IRP Null Handle
CVE-2026-110832 6.5 MEDIUM FreeRDP 2.0.0 before 3.32.0 Memory Exhaustion via DRDYNVC DATA_FIRST
CVE-2026-110830 5.9 MEDIUM FreeRDP before 3.32.0 Denial of Service via Serial IRP_MJ_CREATE
CVE-2026-110833 5.9 MEDIUM FreeRDP before 3.32.0 Unbounded Memory Retention via RDPDR Proxy
CVE-2026-110831 4.3 MEDIUM FreeRDP 3.13.0 before 3.32.0 Resource Leak via Drive Redirection IRP_MJ_CREATE
CVE-2026-110835 4.0 MEDIUM FreeRDP 3.0.0 before 3.32.0 HTTP Header Injection via Proxy Routing Token

IV. Related Vulnerabilities

Same product: FreeRDP
Same vendor: FreeRDP
Same weakness: CWE-787

V. Comments for CVE-2026-110839

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