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.
Metrics
CVSS 3.1 9.8/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| FreeRDP | FreeRDP | < 3.26.0 |
| Red Hat | Red Hat Enterprise Linux 10 | — |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | — |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | — |
| Red Hat | Red Hat Enterprise Linux 8 | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 9 | — |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | — |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — |
| Red Hat | Red Hat Enterprise Linux 6 | — |
References
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mpxh-8fq3-x8mhExploit, Mitigation, Vendor Advisory
- https://access.redhat.com/errata/RHSA-2026:36203
- https://access.redhat.com/errata/RHSA-2026:37207
- https://access.redhat.com/errata/RHSA-2026:38501
- https://access.redhat.com/errata/RHSA-2026:46383
- https://access.redhat.com/errata/RHSA-2026:46384
- https://access.redhat.com/errata/RHSA-2026:46388
- https://access.redhat.com/errata/RHSA-2026:46389
- https://access.redhat.com/errata/RHSA-2026:46393
- https://access.redhat.com/errata/RHSA-2026:47048
- https://access.redhat.com/errata/RHSA-2026:47049
- https://access.redhat.com/errata/RHSA-2026:47201
- https://access.redhat.com/security/cve/CVE-2026-45700
- https://bugzilla.redhat.com/show_bug.cgi?id=2483470
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mpxh-8fq3-x8mhExploit, Mitigation, Vendor Advisory
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45700.json
Timeline
- Published
- May 29, 2026
- Last modified
- Jul 29, 2026
- NVD status
- Modified