CVE-2026-125266
FFmpeg through 9.0.2 contains an uninitialized stack memory disclosure vulnerability in old_codec23() of libavcodec/sanm.c that leaks stack bytes into decoded frames. Attackers can supply a crafted LucasArts SMUSH/SANM animation using codec 23 with an inline table to expose decoder process stack memory in output video.
- Score
- 4.8 medium
- Published
- 2026-11-09
- Links
- NVD · cve.org · Report wrong data
Matched ports (2)
| Port | Package | Version | Status | Maintainer |
|---|---|---|---|---|
| multimedia/ffmpeg | ffmpeg | 9.0.2_3,1 | unaddressed | multimedia@FreeBSD.org |
| multimedia/ffmpeg | ffmpeg-nox11 | 9.0.2_3,1 | unaddressed | multimedia@FreeBSD.org |
Template for a VuXML entry
Check the version numbers before you commit this entry. Some ports share an entry in the CVE database with another port, such as sqlite2 and sqlite3. The version shown here may then be one that never existed for this port.
Ranges per package from the CVE rows that match this port, in pkg notation with the port's epoch and revision, every bound checked with pkg; one range per epoch the port actually had. make newentry in security/vuxml creates the vid.
<vuln vid="FIXME (make newentry)">
<topic>ffmpeg -- FIXME</topic>
<affects>
<package>
<name>ffmpeg</name>
<name>ffmpeg-nox11</name>
<range><ge>8.0,1</ge><le>9.0.2_3,1</le></range>
</package>
</affects>
<description>
<body xmlns="http://www.w3.org/1999/xhtml">
<p>CVE-2026-125266: FFmpeg through 9.0.2 contains an uninitialized stack
memory disclosure vulnerability in old_codec23() of
libavcodec/sanm.c that leaks stack bytes into decoded frames.
Attackers can supply a crafted LucasArts SMUSH/SANM animation using
codec 23 with an inline table to expose decoder process stack
memory in output video.</p>
</body>
</description>
<references>
<cvename>CVE-2026-125266</cvename>
<url>https://nvd.nist.gov/vuln/detail/CVE-2026-125266</url>
</references>
<dates>
<discovery>2026-11-09</discovery>
<entry>2026-11-10</entry>
</dates>
</vuln>