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: 0.2%CVSS: 5.5Exploit: None knownExposed services: Not assessed

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
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100CISA 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
6th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

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

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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

August 6, 2026

Last Modified

September 1, 2026

Advisory Details (4)

Auto-updated Aug 6, 2026
Patch available.
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 / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibswscale5 (7:4.4.2-0ubuntu0.22.04.1+esm16) @ jammy2026-10-05ubuntu

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 ... 7:9.0-1 (92 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.

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 21× in last 7d / 85× 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 170 total refreshes for this CVE.

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

Related CVEs(same product + 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 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 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-70629?
CVE-2026-70629 has a CVSS base score of 5.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-70629?
A fix for CVE-2026-70629 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-70629 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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