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Fencer Vulns
medium 6.5

CVE-2026-38345 json

A Division-by-Zero vulnerability in the ff_sws_init_single_context function (/libswscale/utils.c) of FFmpeg N-122528-gdd2976b9e1 allows att…

published 2026-08-27 2 mo ago modified 2026-09-08 2 mo ago also EUVD-2026-67318

cvss
6.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 29%
public exploits
0
none known

Summary

A Division-by-Zero vulnerability in the ff_sws_init_single_context function (/libswscale/utils.c) of FFmpeg N-122528-gdd2976b9e1 allows attackers to cause a Denial of Service (DoS) via a crafted input.

Patch / fix

  • ffmpeg Debian 14 7:8.1-1

debian advisories DEBIAN-CVE-2026-38345

  • ffmpeg-9 openSUSE Tumbleweed 9.0.2-5.1
  • ffmpeg-7 openSUSE Tumbleweed 7.1.5-4.1
  • ffmpeg-4 openSUSE Tumbleweed 4.4.8-6.1
  • ffmpeg-8 openSUSE Tumbleweed 8.1.2-5.1

opensuse advisories openSUSE-SU-2026:12417-1openSUSE-SU-2026:12108-1openSUSE-SU-2026:12064-1openSUSE-SU-2026:11794-1

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-2026-38345 updated cvss 5.5

ffmpeg: FFmpeg: Denial of Service via division-by-zero vulnerability in `ff_sws_init_single_context` function.

  • Red Hat Enterprise Linux AI (RHEL AI) 3 ffmpeg Red Hat OpenShift AI (RHOAI) rhoai/odh-vllm-gaudi-rhel9
    affected: workaround, no fix available “No mitigation is currently available for this flaw.”

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
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • code.ffmpeg.org https://code.ffmpeg.org/FFmpeg/FFmpeg/issues/21585 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CNA 3.1 6.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Classification

Weakness

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.