CVE-2026-64835

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-22. A secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — Patch released this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

FFmpeg versions 4.4 through 8.1.2 contain an out-of-bounds memory access vulnerability in the ADX audio decoder within libavcodec/adxdec.c that allows attackers to trigger both out-of-bounds reads and writes by supplying a crafted ADX or AAX audio file with a mid-stream channel layout change. When AV_PKT_DATA_NEW_EXTRADATA side data is received mid-stream, the adx_decode_frame function re-parses the stream header but fails to update the internal channel state, causing subsequent decoding operations to access the prev[] state array using a stale channel count.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100CISA SSVC

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
Severity88% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
40th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 22, 2026

Last Modified

July 28, 2026

Advisory Details (3)

Auto-updated Jul 22, 2026
Patch available.
generic

FFmpeg 4.4 - 8.1.2 Out-of-Bounds Memory Access in ADX Audio Decoder | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ffmpeg-out-of-bounds-memory-access-in-adx-audio-decoder
generic

#23659 - avcodec/adx: sync decoder channel state on NEW_EXTRADATA - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23659
generic

avcodec/adx: sync decoder channel state on NEW_EXTRADATA · 1836ef9684 - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/1836ef96846937a6cc2443698a693104f5c0b21e

Vendor Advisories for CVE-2026-64835(20)

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

Patch Availability(30)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatrhai/base-image-rocm-rhel9:17907035062026-10-01redhat
redhatrhai/base-image-cuda-rhel9:17907035862026-10-01redhat
redhatrhai/base-image-rocm-rhel9:17907034942026-10-01redhat
redhatrhai/base-image-spyre-rhel9:17907035682026-10-01redhat
redhatrhai/base-image-cpu-rhel9:17907035902026-10-01redhat
redhatrhai/base-image-tpu-rhel9:17907034972026-10-01redhat
redhatrhoai/odh-vllm-gaudi-rhel9:17891212632026-09-30redhat
redhatffmpeg-0:6.1.6-9.el9ai2026-09-30redhat
redhatrhai/base-image-spyre-rhel9:17881976882026-09-24redhat
redhatrhai/base-image-neuron-rhel9:17881984042026-09-24redhat
redhatrhai/base-image-cuda-12.9-rhel9:17881973852026-09-24redhat
redhatrhai/base-image-cuda-13.0-rhel9:17881979752026-09-24redhat
redhatrhai/base-image-rocm-7.14-rhel9:17881980162026-09-24redhat
redhatrhai/base-image-tpu-rhel9:17881974922026-09-24redhat
redhatrhai/base-image-gaudi-rhel9:17881975422026-09-24redhat
redhatrhai/base-image-cpu-rhel9:17881984072026-09-24redhat
redhatrhai/base-image-rubin-rhel9:17881975122026-09-24redhat
redhatrhai/base-image-rocm-6.4-rhel9:17881976772026-09-22redhat
redhatrhai/base-image-gaudi-rhel9:17881976322026-09-22redhat
redhatrhai/base-image-spyre-rhel9:17881977472026-09-22redhat
redhatrhai/base-image-rocm-7.1-rhel9:17881975492026-09-22redhat
redhatrhai/base-image-cuda-13.0-rhel9:17881977442026-09-22redhat
redhatrhai/base-image-tpu-rhel9:17881976802026-09-22redhat
redhatrhai/base-image-cpu-rhel9:17881975302026-09-22redhat
redhatrhai/base-image-cuda-12.9-rhel9:17881996222026-09-22redhat
redhatrhaiis/vllm-spyre-rhel9:17895024932026-09-17redhat
redhatrhaiis/vllm-rocm-rhel9:17895043712026-09-17redhat
redhatrhaiis/vllm-cuda-rhel9:17895827762026-09-17redhat
redhatrhaiis/model-opt-cuda-rhel9:17895082872026-09-17redhat
redhatrhaiis/vllm-cuda-rhel9:17878605802026-08-31redhat

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 rangeFix by version rangeDependents
ffmpeg7:4.3.2-0+deb11u2 ... 7:8.1.2-2 (91 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
ffmpeg7:5.1.3-1 ... 7:9.0.2-1 (60 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
ffmpeg7:7.1.1-1 ... 7:9.0.2-1 (24 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
ffmpeg7:7.1.1-1 ... 7:9.0.1-1 (19 versions)
  • every version up to 7:9.0.2-1: fixed in 7:9.0.2-1
—

Weakness Classification(1)

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

Additional Vendor Advisories

(16)

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 15× in last 7d / 82× 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 286 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-64835?
CVE-2026-64835 is a high vulnerability published on July 22, 2026. FFmpeg versions 4.4 through 8.1.2 contain an out-of-bounds memory access vulnerability in the ADX audio decoder within libavcodec/adxdec.c that allows attackers to trigger both out-of-bounds reads and writes by supplying a crafted ADX or AAX audio file with a mid-stream channel layout change. When…
When was CVE-2026-64835 disclosed?
CVE-2026-64835 was first published 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-2026-64835 actively exploited?
CVE-2026-64835 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (40th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-64835?
CVE-2026-64835 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-64835?
A fix for CVE-2026-64835 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-64835 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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