Critical severity · published Jul 10, 2026
CVE-2026-57158
FreeRDP planar_decompress_plane_rle_only: heap OOB read — incomplete fix for CVE-2026-23530
9.1
CVSS
0.7%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 53% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FR
FreeRDP · FreeRDP
>= 3.21.0, < 3.28.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-57158
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-57158
Patch
https://github.com/FreeRDP/FreeRDP/commit/a7e797626fcb7f1d556ce63febb84f9f4a822731
Patch
https://github.com/FreeRDP/FreeRDP/pull/12952
Release Notes
https://github.com/FreeRDP/FreeRDP/releases/tag/3.28.0
Exploit
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-mp3f-59pg-c5pp
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