Out-of-bounds read in FFmpeg - CVE-2026-30997
Published: June 23, 2026
Vulnerability identifier: #VU135067
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-30997
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: ffmpeg.sourceforge.net
Affected software:
FFmpeg
FFmpeg
Detailed vulnerability description
The vulnerability allows a remote attacker to crash the application.
The vulnerability exists due to a boundary condition within the read_global_param() function in libavcodec/av1dec.c. A remote attacker can create a specially crafted media content to the application, trigger an out-of-bounds read error and perform a denial of service attack.
How to mitigate CVE-2026-30997
Install updates from vendor's website.