Integer overflow in Freerdp
CVE-2026-111881
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.
Published .
CVSS v3 metric
CVSS v3 base score 7.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/FreeRDP/FreeRDP/security/advisories/GHSA-27m7-gwhh-6hhf (vendor-advisory)
- www.vulncheck.com/advisories/freerdp-3.14.1-before-3.32.0-integer-underflow-in-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111881?
- CVE-2026-111881 is a high-severity vulnerability in Freerdp, classified under Integer Underflow. CVSS score: 7.6/10. Published 2026-10-17.
- How severe is CVE-2026-111881?
- High severity. CVSS v3 base score is 7.6 out of 10.