CVE-2026-45700: Heap-buffer-overflow write in planar bitmap decoder
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, freerdpbitmapdecompressplanar() 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 planardecompressplanerle() to write past the end of pTempData. This vulnerability is fixed in 3.26.0.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/freerdp3to a version that resolves this vulnerability.Fixed in 3.26.0+dfsg-1Fixed in 3.27.0+dfsg-1 - Upgrade
Upgrade
FreeRDP planar bitmap decoder (libfreerdp/codec/planar.c)to a version that resolves this vulnerability.Fixed in 3.26.0
Event History
Frequently Asked Questions
What is the severity of CVE-2026-45700?
CVE-2026-45700 has a risk rating of 65.
How do I fix CVE-2026-45700?
To address CVE-2026-45700, upgrade FreeRDP to version 3.26.0 or later.
What system components are affected by CVE-2026-45700?
CVE-2026-45700 affects the FreeRDP software, specifically the planar bitmap decoder.
What type of vulnerability is CVE-2026-45700?
CVE-2026-45700 is classified as a heap-buffer-overflow vulnerability.
What could be the potential impact of CVE-2026-45700?
Exploitation of CVE-2026-45700 could lead to out-of-bounds heap writes, potentially allowing attackers to execute arbitrary code.