Vulnerability · Published Oct 17, 2026 · Assigned by VulnCheck

CVE-2026-111881FreeRDP 3.14.1 before 3.32.0 Integer Underflow in BMP Writer via Clipboard

High 7.6

In plain English

A high-severity security flaw in FreeRDP from FreeRDP. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.6High

Exploit odds (30 days)0.2%top 84.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

FreeRDP from 3.14.1 before 3.32.0 contains an integer underflow in the WinPR BMP writer, where a mismatched stride calculation passes SIZE_MAX - 3 to Stream_Zero for sub-byte images. A malicious RDP clipboard peer can return a crafted 1-bpp BMP processed by clipboard_synthesize_image_format_to_bmp for CF_DIB/CF_DIBV5, crashing the client or causing an out-of-bounds write.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	freerdp2	no fix listed	DEBIAN-CVE-2026-111881
Debian:13	freerdp3	no fix listed	DEBIAN-CVE-2026-111881
Debian:14	freerdp3	3.32.0+dfsg-1	DEBIAN-CVE-2026-111881
Ubuntu:22.04:LTS	freerdp2	no fix listed	UBUNTU-CVE-2026-111881
Ubuntu:24.04:LTS	freerdp3	3.32.0+dfsg-0ubuntu0.24.04.1	UBUNTU-CVE-2026-111881
Ubuntu:26.04:LTS	freerdp3	3.32.0+dfsg-0ubuntu0.26.04.1	UBUNTU-CVE-2026-111881

Affected products (as reported)

Vendor	Product	Versions
FreeRDP	FreeRDP	3.14.1 – before 3.32.0

Weakness: CWE-191 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

References

GitHub Security Advisory (GHSA-27m7-gwhh-6hhf) vendor-advisory
VulnCheck Advisory: FreeRDP 3.14.1 before 3.32.0 Integer Underflow in BMP Writer via Clipboard third-party-advisory