Medium5.4Red Hat Linux

Medium [CVE-2026-57158] Information disclosure via truncated RDPGFX planar payload

This medium-severity Red Hat Linux advisory covers CVE-2026-57158 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7.

CVE-2026-57158 Published Jul 10, 2026Updated by vendor Jul 10, 2026

CVE-2026-57158

Affected products & platforms

Red Hat LinuxRed Hat Enterprise Linux

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Summary

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.

FreeRDP clients using the Graphics (GFX) pipeline are vulnerable to an out-of-bounds read. A malicious RDP server can exploit this by sending a specially crafted, truncated RDPGFX_CMDID_WIRETOSURFACE_1 planar payload.

This can lead to reading one byte beyond the intended buffer, potentially disclosing sensitive information or causing a denial of service. Red Hat severity: Moderate — CVSS 5.4 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L).

Weakness: CWE-125. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9.

Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Red Hat does not currently list a fixing RHSA for this CVE.

Affected products named by the advisory: Red Hat package: freerdp.

Affected versions

< 3.21.0
< 3.28.0

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Fixed versions

3.28.0

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Official advisory · high-confidence parse· fetched 6 days ago·verify at source

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