CVE-2026-45700
Heap-buffer-overflow write in planar bitmap decoder
- State
- Published
- Severity
- 7.7 High
- Published
- May 29, 2026
- Updated
- Jul 29, 2026
- Reserved
- May 13, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.7 High | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | GitHub_M |
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H | redhat-SADP |
Weaknesses
- CWE-787 Out-of-bounds Write
Affected Products
| Product | Versions |
|---|---|
FreeRDPFreeRDP |
|
References
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mpxh-8fq3-x8mh
- https://access.redhat.com/security/cve/CVE-2026-45700vdb-entry
- RHBZ#2483470issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45700.json
- https://access.redhat.com/errata/RHSA-2026:47201vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:46393vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:36203vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:38501vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:46384vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:46389vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:46388vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:47048vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:46383vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:47049vendor-advisory
- https://access.redhat.com/errata/RHSA-2026:37207vendor-advisory
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