CVE-2026-57158 — FreeRDP planar_decompress_plane_rle_only: heap OOB read — incomplete fix for CVE-2026-23530

Description (CNA)

FreeRDP is a free implementation of the Remote Desktop Protocol. From 3.21.0 before 3.28.0, FreeRDP clients using the GFX pipeline contain an incomplete fix for CVE-2026-23530 in planar_decompress_plane_rle_only in libfreerdp/codec/planar.c, allowing a malicious RDP server to send a truncated RDPGFX_CMDID_WIRETOSURFACE_1 planar payload that reads one byte past the input buffer. This issue is fixed in version 3.28.0.

Affected (CNA)

Vendor / product	Versions
FreeRDP / FreeRDP	affected >= 3.21.0, < 3.28.0

CWE

CWE-125

References

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mp3f-59pg-c5pp
https://github.com/FreeRDP/FreeRDP/pull/12952
https://github.com/FreeRDP/FreeRDP/commit/a7e797626fcb7f1d556ce63febb84f9f4a822731
https://github.com/FreeRDP/FreeRDP/releases/tag/3.28.0

ADP enrichment

CISA-ADP

No English description supplied.

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mp3f-59pg-c5pp