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CVE details

CVE-2026-30754

A memory corruption vulnerability exists in FFmpeg before 8.1. The RTP encoding process. In the nal_send function in libavformat/rtpenc_h264_hevc.c, a negative size parameter (size=-3) is passed to memcpy when transmitting H.264/HEVC streams via RTP using a crafted input file. This was detected using AddressSanitizer.

Score
8.8 high
Published
2026-09-08
Links
NVD · cve.org

Affected ports (3)

PortPackageVersionStatusMaintainer
multimedia/ffmpeg3ffmpeg33.0.2_1unaddressedkreinholz@gmail.com
multimedia/linux-rl9-ffmpeglinux-rl9-ffmpeg-libs7.1.5unaddressedemulation@FreeBSD.org
multimedia/ffmpeg4ffmpeg44.4.8_2possibly backportedmonwarez@mailoo.org

Template for a VuXML entry

Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.

  <vuln vid="FIXME (make newentry)">
    <topic>FIXME -- FIXME</topic>
    <affects>
      <package>
	<name>ffmpeg3</name>
	<range><lt>8.1</lt></range>
      </package>
      <package>
	<name>linux-rl9-ffmpeg-libs</name>
	<range><lt>8.1</lt></range>
      </package>
    </affects>
    <description>
      <body xmlns="http://www.w3.org/1999/xhtml">
	<p>A memory corruption vulnerability exists in FFmpeg before 8.1. The RTP
	encoding process. In the nal_send function in
	libavformat/rtpenc_h264_hevc.c, a negative size parameter (size=-3) is
	passed to memcpy when transmitting H.264/HEVC streams via RTP using a
	crafted input file. This was detected using AddressSanitizer.</p>
      </body>
    </description>
    <references>
      <cvename>CVE-2026-30754</cvename>
      <url>https://nvd.nist.gov/vuln/detail/CVE-2026-30754</url>
    </references>
    <dates>
      <discovery>2026-09-08</discovery>
      <entry>2026-10-25</entry>
    </dates>
  </vuln>