high 7.5

CVE-2026-64834 json

FFmpeg 0.6.3 - 8.1.2 Infinite Loop DoS via RTP/ASF Demuxer

published 2026-07-22 3 mo ago modified 2026-10-24 15 d ago also EUVD-2026-47758 , GHSA-5xcx-3qx2-qv4x , JLSEC-2026-1176

cvss: 7.5; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 54%
public exploits: 0; none known

FFmpeg versions 0.6.3 through 8.1.2 contain an infinite loop vulnerability in the RTP/ASF demuxer within libavformat/rtpdec_asf.c that allows remote attackers to cause denial of service by sending a crafted RTP/ASF stream. The rtp_asf_fix_header function fails to validate a minimum chunksize when iterating over ASF objects, causing the loop pointer to never advance when a chunksize is smaller than the 24-byte minimum ASF object header size, resulting in CPU exhaustion that denies service to legitimate users.

Patch / fix

fixed in 3 distros 5 links 2

julia FFMPEG_jll 9.0.0+0
julia FFMPEG_nogpl_jll 9.0.0+0
julia FFplay_jll 9.0.0+0

debian ubuntu red hat suse opensuse

ffmpeg Debian 14 7:9.0.2-1

debian advisories DEBIAN-CVE-2026-64834

ffmpeg Ubuntu Pro 16.04 LTS 7:2.8.17-0ubuntu0.1+esm17
ffmpeg Ubuntu Pro 18.04 LTS 7:3.4.11-0ubuntu0.1+esm15
ffmpeg Ubuntu Pro 20.04 LTS 7:4.2.7-0ubuntu0.1+esm16
ffmpeg Ubuntu Pro 22.04 LTS 7:4.4.2-0ubuntu0.22.04.1+esm15
ffmpeg Ubuntu Pro 24.04 LTS 7:6.1.1-3ubuntu5+esm13
ffmpeg Ubuntu Pro 26.04 LTS 7:8.0.1-3ubuntu2+esm4

ubuntu advisories UBUNTU-CVE-2026-64834

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

ffmpeg enterprise linux ai 3.0 6.1.6-9.el9ai
ffmpeg-free-rhai enterprise linux ai 3.0 6.1.6-9.el9ai
libavutil-free-rhai enterprise linux ai 3.0 6.1.6-9.el9ai
libavcodec-free-rhai enterprise linux ai 3.0 6.1.6-9.el9ai
libswscale-free-rhai enterprise linux ai 3.0 6.1.6-9.el9ai
libavdevice-free-rhai enterprise linux ai 3.0 6.1.6-9.el9ai
libavfilter-free-rhai enterprise linux ai 3.0 6.1.6-9.el9ai
libavformat-free-rhai enterprise linux ai 3.0 6.1.6-9.el9ai

red hat advisories RHSA-2026:74089 RHSA-2026:66381 RHSA-2026:60336 RHSA-2026:60334 RHSA-2026:60335

ffmpeg-4 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 4.4.8-150400.3.75.1
ffmpeg-4 SLE Workstation Extension 15 SP7, SLE Module for Package Hub 15 SP7 4.4.8-150600.13.55.1
ffmpeg SLES for SAP 15 SP6, SLES for SAP 15 SP5, SLES for SAP 15 SP4 +10 more 3.4.2-150200.11.79.1

suse advisories SUSE-SU-2026:4150-1 SUSE-SU-2026:4149-1 SUSE-SU-2026:3934-1

ffmpeg-7 openSUSE Leap 16.0 7.1.5-160000.1.1
ffmpeg-8 openSUSE Tumbleweed 8.1.2-3.1
ffmpeg-7 openSUSE Tumbleweed 7.1.5-2.1
ffmpeg-4 openSUSE Tumbleweed 4.4.8-4.1
ffmpeg-9 openSUSE Tumbleweed 9.0.1-2.1

opensuse advisories openSUSE-SU-2026:21877-1 openSUSE-SU-2026:11682-1 openSUSE-SU-2026:11665-1 openSUSE-SU-2026:11563-1 openSUSE-SU-2026:11545-1

code.ffmpeg.org/FFmpeg/FFmpeg@11d5f47 commit
code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23663 patch

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-2026-64834 updated 2026-10-29 cvss 7.5

FFmpeg: Denial of Service via crafted RTP/ASF stream

Red Hat AI Inference Server 3.5 rhaii/vllm-cpu-rhel9 1791473614, rhaii/vllm-cuda-rhel9 1791473631, rhaii/vllm-rocm-rhel9 1791425869, rhaii/vllm-gaudi-rhel9 1791427182, rhaii/vllm-spyre-rhel9 1791818357, rhaii/model-opt-cuda-rhel9 1791803821
fixed: vendor fix RHSA-2026:82066
Red Hat Enterprise Linux AI 3.0 for RHEL 9 ffmpeg 6.1.6-9.el9ai, ffmpeg-free-rhai 6.1.6-9.el9ai, libavutil-free-rhai 6.1.6-9.el9ai, libavcodec-free-rhai 6.1.6-9.el9ai, libswscale-free-rhai 6.1.6-9.el9ai, libavdevice-free-rhai 6.1.6-9.el9ai, +4 more
fixed: vendor fix RHSA-2026:74089
Red Hat Enterprise Linux AI 3.3 for RHEL 9 ffmpeg 6.1.6-7.el9ai, ffmpeg-free-rhai 6.1.6-7.el9ai, libavutil-free-rhai 6.1.6-7.el9ai, libavcodec-free-rhai 6.1.6-7.el9ai, libswscale-free-rhai 6.1.6-7.el9ai, libavdevice-free-rhai 6.1.6-7.el9ai, +4 more
fixed: vendor fix RHSA-2026:60336
Red Hat Enterprise Linux AI 3.4 for RHEL 9 ffmpeg 6.1.6-7.el9ai, ffmpeg-free-rhai 6.1.6-7.el9ai, libavutil-free-rhai 6.1.6-7.el9ai, libavcodec-free-rhai 6.1.6-7.el9ai, libswscale-free-rhai 6.1.6-7.el9ai, libavdevice-free-rhai 6.1.6-7.el9ai, +4 more
fixed: vendor fix RHSA-2026:60334
Red Hat Enterprise Linux AI 3.5 rhelai3/bootc-cuda-rhel9 1793135861, rhelai3/bootc-rocm-rhel9 1793135863, rhelai3/bootc-aws-cuda-rhel9 1793194817, rhelai3/bootc-gcp-cuda-rhel9 1793194815, rhelai3/disk-image-cuda-rhel9 1793206758, rhelai3/bootc-azure-cuda-rhel9 1793194815, +1 more
fixed: vendor fix RHSA-2026:92452
Red Hat Enterprise Linux AI 3.5 for RHEL 9 ffmpeg 6.1.6-7.el9ai, ffmpeg-free-rhai 6.1.6-7.el9ai, libavutil-free-rhai 6.1.6-7.el9ai, libavcodec-free-rhai 6.1.6-7.el9ai, libswscale-free-rhai 6.1.6-7.el9ai, libavdevice-free-rhai 6.1.6-7.el9ai, +4 more
fixed: vendor fix RHSA-2026:60335
Red Hat Enterprise Linux AI 3.6 for RHEL 9 ffmpeg 6.1.6-8.el9ai, ffmpeg-free-rhai 6.1.6-8.el9ai, libavutil-free-rhai 6.1.6-8.el9ai, libavcodec-free-rhai 6.1.6-8.el9ai, libswscale-free-rhai 6.1.6-8.el9ai, libavdevice-free-rhai 6.1.6-8.el9ai, +4 more
fixed: vendor fix RHSA-2026:66381
Red Hat OpenShift AI 3.2 rhai/base-image-cpu-rhel9 1791232203, rhai/base-image-tpu-rhel9 1791231896, rhai/base-image-cuda-rhel9 1791232024, rhai/base-image-cuda-rhel9 1791818587, rhai/base-image-rocm-rhel9 1791231767, rhai/base-image-rocm-rhel9 1791231952, +1 more
fixed: vendor fix RHSA-2026:81128

show 3 more

Red Hat OpenShift AI 3.3 rhoai/odh-vllm-gaudi-rhel9 1789121263
fixed: vendor fix RHSA-2026:73987
Red Hat OpenShift AI 3.5 rhai/base-image-cpu-rhel9 1790703656, rhai/base-image-cpu-rhel9 1791232399, rhai/base-image-tpu-rhel9 1790703554, rhai/base-image-gaudi-rhel9 1790703552, rhai/base-image-rubin-rhel9 1790703707, rhai/base-image-spyre-rhel9 1790703630, +7 more
fixed: vendor fix RHSA-2026:81161
Red Hat OpenShift AI 3.3 rhoai/odh-cli-rhel9 1790070206, rhoai/rhai-cli-rhel9 1790070206, rhoai/odh-mlflow-rhel9 1789653606, rhoai/odh-trainer-rhel9 1790136369, rhoai/odh-maas-api-rhel9 1790131842, rhoai/odh-mlserver-rhel9 1789121365, +76 more
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: yes
Technical impact: partial
Assessed: 3 mo ago (2026-07-23)

Exploit prediction

0.73% chance of exploitation in the next 30 days, higher than 54% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	4.0	8.7	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CNA	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA	4.0	8.7	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
OSV	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
julia	FFMPEG_jll	<9.0.0+0	9.0.0+0
julia	FFMPEG_nogpl_jll	<9.0.0+0	9.0.0+0
julia	FFplay_jll	<9.0.0+0	9.0.0+0

Affected products

FFmpeg FFmpeg

Classification

Weakness

CWE-835 Loop with Unreachable Exit Condition

References

code.ffmpeg.org /FFmpeg/FFmpeg/commit/11d5f475be95d22d5f0692220cc772b116abc632
patch, web
code.ffmpeg.org /FFmpeg/FFmpeg/pulls/23663
issue-tracking, patch, web
vulncheck.com /advisories/ffmpeg-infinite-loop-dos-via-rtp-asf-demuxer
third-party-advisory, web
github.com /advisories/GHSA-5xcx-3qx2-qv4x
web
nvd.nist.gov /vuln/detail/CVE-2026-64834
web

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.

Summary