CVE-2026-45700
Heap-buffer-overflow write in planar bitmap decoder
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-787 |
| Vendor | freerdp |
| Product | freerdp |
| Published | May 29, 2026 |
| Last Updated | Jul 15, 2026 |
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Affected Versions
FreeRDP / FreeRDP
< 3.26.0
References
github.com: https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mpxh-8fq3-x8mh access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-45700 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2483470 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45700.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:36203 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:38501 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:37207