8.7

CVE-2026-64834: ffmpeg Infinite Loop

CVSS: 8.7v4.0HighAnalyzed
AliasesUBUNTU-CVE-2026-64834DEBIAN-CVE-2026-64834CGA-395p-2pfg-ccc6
Published 22-07-2026Last modified 28-07-2026
Open JSON

Vulnerability summary

CVE-2026-64834 is a high (CVSS 8.7) Infinite Loop vulnerability in ffmpeg. EPSS estimates a 0.73% chance of exploitation in the next 30 days, higher than 53.3% of scored vulnerabilities.

Overall risk
35/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.7/10
010
High · v4.0 (CVE.org)
EPSS score
0.73%
0%100%
Low · +0.22 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 16 · Related 10
MGASA-2026-0398OPENSUSE-SU-2026:11545-1OPENSUSE-SU-2026:11563-1OPENSUSE-SU-2026:11665-1OPENSUSE-SU-2026:11682-1OPENSUSE-SU-2026:21877-1

Timeline

  1. 22-07-2026
    PublishedVulnerability first disclosed.
  2. 28-07-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

9 scores · 6 sources · 2 versions

EPSS trend

Probability

0.73%

Chance of exploitation in the next 30 days

Percentile

53%

Versus all other CVEs

30-day change

+0.22 pp

From 0.50% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.73%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard18 products
  • eco-python-ffmpeg-6-minimalAll versions (No fix recorded)
  • eco-python-ffmpeg-6-minimal-devAll versions (No fix recorded)
  • eco-python-ffmpeg-6-minimal-staticAll versions (No fix recorded)
  • eco-python-ffmpeg-7-minimalAll versions (No fix recorded)
  • eco-python-ffmpeg-7-minimal-devAll versions (No fix recorded)
Wolfi4 products
  • ffmpeg-7All versions (No fix recorded)
  • ffmpeg-7.1All versions (No fix recorded)
  • ffmpeg-8.0All versions (No fix recorded)
  • ffmpeg-8.1< 8.1.3-r0
Ubuntu2 products
  • ffmpeg< 7:2.8.17-0ubuntu0.1+esm17 | < 7:3.4.11-0ubuntu0.1+esm15 | < 7:4.2.7-0ubuntu0.1+esm16 | < 7:4.4.2-0ubuntu0.22.04.1+esm15 | < 7:6.1.1-3ubuntu5+esm13 | All versions (No fix recorded) | < 7:8.0.1-3ubuntu2+esm4
  • libavAll versions (No fix recorded)
Debian1 product
  • ffmpegAll versions (No fix recorded) | < 7:9.0.2-1
Ffmpeg1 product
  • ffmpeg11d5f475be95d22d5f0692220cc772b116abc632 | ≥ 0.6.3, ≤ 8.1.2

5 vendors · 26 products

References

11 links
Show all 11 references