High severity · published Aug 19, 2026
CVE-2026-75144
FFmpeg Heap Buffer Overflow in VC-2/Dirac RTP Packetizer
7.8
CVSS
0.2%
EPSS
No
On KEV
Description
FFmpeg before commit 1cdeb3c contains a heap buffer overflow vulnerability in the VC-2/Dirac RTP packetizer (libavformat/rtpenc_vc2hq.c) that allows attackers to trigger memory corruption by supplying a crafted Dirac data unit. The packetizer copies an input-derived data unit or fragment size into a fixed-size buffer without an upper bound check, causing a heap buffer overflow when the crafted input is packetized for RTP output.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 10% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
FF
FFmpeg · FFmpeg
before 1cdeb3c4e7f1f8566d846b9b451e01c376398818 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-75144
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-75144
code.ffmpeg.org
https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/1cdeb3c4e7f1f8566d846b9b451e01c376398818
code.ffmpeg.org
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24091
www.vulncheck.com
https://www.vulncheck.com/advisories/ffmpeg-heap-buffer-overflow-in-vc-2-dirac-rtp-packetizer
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