SB2026080675 - Red Hat Enterprise Linux 8 update for gstreamer1-plugins-bad-free
Published: August 6, 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-2026-52720)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to out-of-bounds read and out-of-bounds write in the rfbsrc element when processing crafted RFB protocol data. A remote attacker can send crafted framebuffer update messages with rectangle coordinates extending beyond the framebuffer boundaries to execute arbitrary code.
The issue can also be triggered by connecting to a crafted VNC server.
2) Integer overflow (CVE-ID: CVE-2026-52722)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to cause a denial of service or disclose sensitive information.
The vulnerability exists due to integer overflow in vmncdec element when parsing crafted VMNC streams with cursor rectangle data. A remote attacker can send a specially crafted VMNC stream to cause a denial of service or disclose sensitive information.
The issue occurs during cursor payload size computation using signed integer arithmetic, which can produce a negative length value that bypasses a subsequent short-packet check.
Remediation
Install update from vendor's website.