CVE-2026-45700 | THREATINT

Description

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.26.0, FreeRDP's planar bitmap decoder has an out-of-bounds heap write when decoding RLE planar data. In libfreerdp/codec/planar.c, freerdp_bitmap_decompress_planar() validates the X destination coordinate nXDst against the caller-provided destination stride (nDstStep) even when it is writing into the internal temp buffer pTempData. An attacker can bypass the check with a large nDstStep and a large nXDst, causing planar_decompress_plane_rle() to write past the end of pTempData. This vulnerability is fixed in 3.26.0.

PUBLISHED Reserved 2026-05-13 | Published 2026-05-29 | Updated 2026-06-02 | Assigner GitHub_M

HIGH: 7.7CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-787: Out-of-bounds Write

Product status

< 3.26.0

affected

References

github.com/...reeRDP/security/advisories/GHSA-mpxh-8fq3-x8mh exploit

github.com/...reeRDP/security/advisories/GHSA-mpxh-8fq3-x8mh

cve.org (CVE-2026-45700)

nvd.nist.gov (CVE-2026-45700)

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