CVE-2026-125394

medium

Description

FreeRDP before 3.33.0 contains a heap use-after-free vulnerability in update_gdi_patblt(), update_gdi_polygon_cb() and update_gdi_mem3blt() that retain stale brush cache pointers. A malicious RDP server can resend CACHE_BRUSH to the same slot then send PATBLT, causing clients to read freed heap memory, disclosing data or crashing.

References

https://github.com/D7EAD/CVE-2026-125394

https://www.vulncheck.com/advisories/freerdp-before-3.33.0-use-after-free-via-stale-brush-cache-pointer

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-fw6x-h8gw-778w

https://github.com/FreeRDP/FreeRDP/releases/tag/3.33.0

https://github.com/FreeRDP/FreeRDP/commit/ffc6b976e3589b768e8e279bc61dfb7b5896e832

https://github.com/FreeRDP/FreeRDP/blob/3.32.2/libfreerdp/cache/brush.c#L80

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-120557

Details

Source: Mitre, NVD

Published: 2026-11-10

Updated: 2026-11-10

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 5.4

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

Severity: Medium

CVSS v4

Base Score: 5.3

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N

Severity: Medium

EPSS

EPSS: 0.00212