SB20260408131 - Red Hat Enterprise Linux 9 update for freerdp
Published: April 8, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 vulnerabilities.
1) Out-of-bounds write (CVE-ID: CVE-2026-26965)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to out-of-bounds write in planar_decompress_plane_rle() in the PLANAR RLE decode path when processing a crafted RDP planar bitmap in the temp-buffer path. A remote attacker can send a specially crafted RDP server response to execute arbitrary code.
User interaction is required because the victim must connect to a malicious RDP server.
2) Out-of-bounds write (CVE-ID: CVE-2026-26955)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to out-of-bounds write in gdi_SurfaceCommand_ClearCodec() when processing an RDPGFX ClearCodec surface command with an out-of-bounds destination rectangle. A remote attacker can send a specially crafted RDP server response to execute arbitrary code.
User interaction is required because the victim must connect to a malicious RDP server.
Remediation
Install update from vendor's website.