CVE-2026-70629

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-08-07. a secondary CVSS source baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

FFmpeg versions from 3.0 up to, but not including, 9.0 contain an uninitialized heap memory read vulnerability in the native RSCC decoder (libavcodec/rscc.c) that allows attackers to disclose heap memory contents by supplying a crafted video file with a compressed tile that decompresses fewer bytes than the declared tile geometry requires. When rscc_decode_frame() calls av_image_copy_plane() without validating the decompressed byte count against the tile dimensions, the unwritten suffix of the persistent intermediate buffer ctx->inflated_buf is copied into the decoded frame, potentially exposing data from prior heap allocations or previous decoded frames in persistent decoding services.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

August 6, 2026

Last Modified

September 1, 2026

Advisory Details (4)

Auto-updated Aug 6, 2026
No patch confirmed yet.
generic

#23895 - avcodec/rscc: reject deflate output shorter than the tile - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23895
generic

avcodec/rscc: do not leave uninitilized data when the input is too short · cd1f545cf2 - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/cd1f545cf27ba08f6f5b31b1e92665d7874d4fd7
generic

avcodec/rscc: do not leave uninitilized data when the input is too short · a5fe21a1a4 - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/a5fe21a1a410a680fe93c33b0dd696b7e1c3aea4
generic

innoHeim/Rsupport Screen Capture Codec decoder · 533a619850 - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/533a6198505edd1379e1cd722852350ae4a85acc

Vendor Advisories for CVE-2026-70629(1)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulibswscale5 (7:4.4.2-0ubuntu0.22.04.1+esm16) @ jammy2026-09-19ubuntu

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 ... 7:9.0-1 (92 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.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 22× in last 7d / 81× 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 126 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-70629?
CVE-2026-70629 is a medium vulnerability published on August 6, 2026. FFmpeg versions from 3.0 up to, but not including, 9.0 contain an uninitialized heap memory read vulnerability in the native RSCC decoder (libavcodec/rscc.c) that allows attackers to disclose heap memory contents by supplying a crafted video file with a compressed tile that decompresses fewer bytes…
When was CVE-2026-70629 disclosed?
CVE-2026-70629 was first published in the National Vulnerability Database on August 6, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-70629 actively exploited?
CVE-2026-70629 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.1% of all scored CVEs.
What is the CVSS score of CVE-2026-70629?
CVE-2026-70629 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-70629?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-70629, 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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