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Fencer Vulns
medium 6.2

CVE-2026-52295 json

FFmpeg before 9.0 has an out-of-bounds read because the copied extradata lacked required padding before GetBitContext-based access in libav…

published 2026-09-01 2 mo ago modified 2026-10-14 25 d ago also EUVD-2026-69409

cvss
6.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits
0
none known

Summary

FFmpeg before 9.0 has an out-of-bounds read because the copied extradata lacked required padding before GetBitContext-based access in libavformat/iamf_writer.c.

Patch / fix

  • FFmpeg FFmpeg 9.0
  • ffmpeg Debian 13 7:7.1.4-0+deb13u1
  • ffmpeg Debian 14 7:8.1.1-1

debian advisories DEBIAN-CVE-2026-52295

  • ffmpeg-8 openSUSE Tumbleweed 8.1.3-4.1
  • ffmpeg-9 openSUSE Tumbleweed 9.0.2-5.1

opensuse advisories openSUSE-SU-2026:12416-1openSUSE-SU-2026:12417-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-52295 updated cvss 6.2

ffmpeg: FFmpeg: Denial of Service via Buffer Overflow in iamf_writer.c component

  • Red Hat Enterprise Linux AI (RHEL AI) 3 ffmpeg 6.1.6-10.el9ai
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 2.9 CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA ADP 3.1 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • FFmpeg FFmpeg

Classification

Weakness
  • CWE-125 Out-of-bounds Read
  • CWE-120 Buffer Copy without Checking Size of Input

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.