SB2026080683 - Red Hat Enterprise Linux 10 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) Heap-based buffer overflow (CVE-ID: CVE-2026-59691)
CWE-ID: CWE-122 - Heap-based Buffer Overflow
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 heap-based buffer overflow in rfbsrc element RFB decoder when decoding crafted framebuffer updates from a VNC server. A remote attacker can operate a crafted VNC server and send framebuffer updates with specific pixel formats and encoding types to execute arbitrary code.
This may also cause a crash, denial of service, or data corruption in the client application.
2) Stack-based buffer overflow (CVE-ID: CVE-2026-59692)
CWE-ID: CWE-121 - Stack-based buffer overflow
CVSSv4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/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 stack-based buffer overflow in the DTLS connection implementation when verifying peer certificates during the DTLS handshake. A remote attacker can send a certificate with an oversized Subject DN to execute arbitrary code.
The issue can also cause a process crash or data corruption, and can be triggered by a DTLS-SRTP or WebRTC peer during handshake verification.
Remediation
Install update from vendor's website.