CVE-2026-110839

FreeRDP 3.3.0 before 3.32.0 Heap Out-of-Bounds Write via Grayscale JPEG Clipboard Data

HIGH
7.1
CVSS Score
Published: October 14, 2026 at 10:52 PM UTC
Updated: October 23, 2026 at 08:55 PM UTC
1 product affected across 1 vendorFreeRDP

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Severity
HIGH7.1
Exploit prediction
EPSS 0.3%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

3.3.0 ≤ v < 3.32.0
Vendor states this is fixed in 3.32.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.1HIGHVulnCheck
Vector?

Quick Info

StatusANALYZED
CWE
CWE-787

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