CVE-2026-64834

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-22. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released this week
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

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 v3
7.5
EG Score
7.5(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity75% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
41%
KEV
Not listed

Published

July 22, 2026

Last Modified

July 28, 2026

Advisory Details (3)

Auto-updated Jul 22, 2026
No patch confirmed yet.
generic

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

https://www.vulncheck.com/advisories/ffmpeg-infinite-loop-dos-via-rtp-asf-demuxer
generic

#23663 - avformat/rtpdec_asf: reject ASF objects smaller than their header - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23663
generic

avformat/rtpdec_asf: reject ASF objects smaller than their header · 11d5f475be - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/11d5f475be95d22d5f0692220cc772b116abc632

Vendor Advisories for CVE-2026-64834(4)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibswscale5 (7:4.4.2-0ubuntu0.22.04.1+esm15) @ jammy2026-09-14ubuntu
ubuntulibswscale9 (7:8.0.1-3ubuntu2+esm4) @ resolute2026-09-14ubuntu
redhatffmpeg-0:6.1.6-8.el9ai2026-09-10redhat
redhatffmpeg-0:6.1.6-7.el9ai2026-08-26redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:4.3.2-0+deb11u2 ... 7:8.1.2-2 (91 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:5.1.3-1 ... 7:9.0.1-1 (59 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:7.1.1-1 ... 7:9.0.1-1 (23 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:7.1.1-1 ... 7:9.0.1-1 (19 versions)——

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(3)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 23× in last 7d / 100× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 203 total refreshes for this CVE.

  1. 2026-09-14 11:13 UTCVendor advisory
  2. 2026-09-14 11:13 UTCGHSA enrichment
  3. 2026-09-13 22:26 UTCEG score recompute
  4. 2026-09-13 22:26 UTCVendor advisory
  5. 2026-09-13 22:26 UTCGHSA enrichment
  6. 2026-09-13 08:29 UTCVendor advisory
  7. 2026-09-13 08:29 UTCGHSA enrichment
  8. 2026-09-12 19:41 UTCEG score recompute
  9. 2026-09-12 19:41 UTCVendor advisory
  10. 2026-09-12 19:41 UTCGHSA enrichment
  11. 2026-09-12 06:53 UTCVendor advisory
  12. 2026-09-12 06:53 UTCGHSA enrichment
  13. 2026-09-11 17:52 UTCEG score recompute
  14. 2026-09-11 17:52 UTCVendor advisory
  15. 2026-09-11 17:52 UTCGHSA enrichment
  16. 2026-09-11 14:53 UTCEPSS rescore
  17. 2026-09-11 09:37 UTCEPSS rescore
  18. 2026-09-10 21:32 UTCEG score recompute
  19. 2026-09-10 21:32 UTCVendor advisory
  20. 2026-09-10 21:32 UTCGHSA enrichment
  21. 2026-09-09 09:14 UTCEG score recompute
  22. 2026-09-09 09:14 UTCVendor advisory
  23. 2026-09-09 09:14 UTCGHSA enrichment
  24. 2026-09-08 22:01 UTCEPSS rescore
  25. 2026-09-07 21:41 UTCEG score recompute
Show 75 more
  1. 2026-09-07 21:41 UTCVendor advisory
  2. 2026-09-07 21:41 UTCGHSA enrichment
  3. 2026-09-07 16:01 UTCEPSS rescore
  4. 2026-09-06 13:47 UTCEPSS rescore
  5. 2026-09-06 08:50 UTCVendor advisory
  6. 2026-09-06 08:50 UTCGHSA enrichment
  7. 2026-09-05 20:01 UTCEG score recompute
  8. 2026-09-05 20:01 UTCVendor advisory
  9. 2026-09-05 20:01 UTCGHSA enrichment
  10. 2026-09-05 15:31 UTCEPSS rescore
  11. 2026-09-05 07:13 UTCEG score recompute
  12. 2026-09-05 07:13 UTCVendor advisory
  13. 2026-09-05 07:13 UTCGHSA enrichment
  14. 2026-09-04 13:53 UTCEG score recompute
  15. 2026-09-04 13:53 UTCVendor advisory
  16. 2026-09-04 13:53 UTCGHSA enrichment
  17. 2026-09-04 05:07 UTCEPSS rescore
  18. 2026-09-02 14:12 UTCEPSS rescore
  19. 2026-09-01 23:40 UTCEG score recompute
  20. 2026-09-01 23:40 UTCVendor advisory
  21. 2026-09-01 23:40 UTCGHSA enrichment
  22. 2026-09-01 13:54 UTCEPSS rescore
  23. 2026-09-01 04:40 UTCEPSS rescore
  24. 2026-08-31 02:29 UTCEG score recompute
  25. 2026-08-31 02:29 UTCVendor advisory
  26. 2026-08-31 02:29 UTCGHSA enrichment
  27. 2026-08-30 19:17 UTCEPSS rescore
  28. 2026-08-30 13:41 UTCEG score recompute
  29. 2026-08-30 13:41 UTCVendor advisory
  30. 2026-08-30 13:41 UTCGHSA enrichment
  31. 2026-08-30 01:22 UTCEPSS rescore
  32. 2026-08-30 00:53 UTCEG score recompute
  33. 2026-08-30 00:53 UTCVendor advisory
  34. 2026-08-30 00:53 UTCGHSA enrichment
  35. 2026-08-28 21:42 UTCEPSS rescore
  36. 2026-08-27 23:06 UTCEG score recompute
  37. 2026-08-27 23:06 UTCVendor advisory
  38. 2026-08-27 23:06 UTCGHSA enrichment
  39. 2026-08-27 10:18 UTCVendor advisory
  40. 2026-08-27 10:18 UTCGHSA enrichment
  41. 2026-08-26 21:27 UTCEG score recompute
  42. 2026-08-26 21:27 UTCGHSA enrichment
  43. 2026-08-26 14:47 UTCEPSS rescore
  44. 2026-08-26 08:40 UTCGHSA enrichment
  45. 2026-08-25 19:52 UTCEG score recompute
  46. 2026-08-25 19:52 UTCGHSA enrichment
  47. 2026-08-25 13:49 UTCEPSS rescore
  48. 2026-08-25 07:03 UTCGHSA enrichment
  49. 2026-08-24 18:15 UTCEG score recompute
  50. 2026-08-24 18:15 UTCGHSA enrichment
  51. 2026-08-24 03:34 UTCGHSA enrichment
  52. 2026-08-23 14:46 UTCGHSA enrichment
  53. 2026-08-23 01:58 UTCEG score recompute
  54. 2026-08-23 01:58 UTCGHSA enrichment
  55. 2026-08-23 00:19 UTCEPSS rescore
  56. 2026-08-22 13:11 UTCGHSA enrichment
  57. 2026-08-22 00:23 UTCEG score recompute
  58. 2026-08-22 00:23 UTCGHSA enrichment
  59. 2026-08-21 23:49 UTCEPSS rescore
  60. 2026-08-21 11:35 UTCEG score recompute
  61. 2026-08-21 11:35 UTCGHSA enrichment
  62. 2026-08-20 22:55 UTCEPSS rescore
  63. 2026-08-20 22:23 UTCGHSA enrichment
  64. 2026-08-20 09:35 UTCGHSA enrichment
  65. 2026-08-19 20:48 UTCEG score recompute
  66. 2026-08-19 20:48 UTCGHSA enrichment
  67. 2026-08-19 17:04 UTCEPSS rescore
  68. 2026-08-19 07:59 UTCGHSA enrichment
  69. 2026-08-18 19:12 UTCEG score recompute
  70. 2026-08-18 19:12 UTCGHSA enrichment
  71. 2026-08-18 13:48 UTCEPSS rescore
  72. 2026-08-18 01:28 UTCEG score recompute
  73. 2026-08-18 01:28 UTCGHSA enrichment
  74. 2026-08-17 13:47 UTCEPSS rescore
  75. 2026-08-17 11:30 UTCGHSA enrichment

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-64834?
CVE-2026-64834 is a high vulnerability published on July 22, 2026. FFmpeg versions 0.6.3 through 8.1.2 contain an infinite loop vulnerability in the RTP/ASF demuxer within libavformat/rtpdecasf.c that allows remote attackers to cause denial of service by sending a crafted RTP/ASF stream. The rtpasffixheader function fails to validate a minimum chunksize when…
When was CVE-2026-64834 disclosed?
CVE-2026-64834 was first published in the National Vulnerability Database on July 22, 2026, with the most recent update on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64834 actively exploited?
CVE-2026-64834 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 58.5% of all scored CVEs.
What is the CVSS score of CVE-2026-64834?
CVE-2026-64834 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-64834?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64834, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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