CVE-2026-65703

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-23. a secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

FFmpeg versions 2.7 through 8.1.2 contain an out-of-bounds write vulnerability in the TDSC video decoder that allows remote attackers to cause heap corruption by supplying a crafted AVI file that changes frame dimensions across TDSF frames. The tdsc_parse_tdsf() function fails to unreference the existing reference frame before calling av_frame_get_buffer(), causing tdsc_blit() and tdsc_yuv2rgb() to write attacker-controlled pixel data beyond the end of the undersized reference frame buffer, resulting in a process crash and potential code execution.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
21%
KEV
Not listed

Published

July 23, 2026

Last Modified

August 7, 2026

Advisory Details (3)

Auto-updated Jul 23, 2026
No patch confirmed yet.
generic

FFmpeg 2.7 - 8.1.2 Out-of-Bounds Write in TDSC Video Decoder | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ffmpeg-out-of-bounds-write-in-tdsc-video-decoder
generic

avcodec/tdsc: unref the reference frame before reallocating on size change · fd3ee52fab - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/fd3ee52fab34d98a95b787d0b5ff45685766200c
generic

#23773 - avcodec/tdsc: unref the reference frame before reallocating on size change - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23773

Vendor Advisories for CVE-2026-65703(1)

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

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 ... 7:8.1.2-2 (57 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:7.1.1-1 ... 7:8.1.2-2 (21 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:7.1.1-1 ... 7:8.1.2-2 (17 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 107× 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 138 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-65703?
CVE-2026-65703 is a high vulnerability published on July 23, 2026. FFmpeg versions 2.7 through 8.1.2 contain an out-of-bounds write vulnerability in the TDSC video decoder that allows remote attackers to cause heap corruption by supplying a crafted AVI file that changes frame dimensions across TDSF frames. The tdscparsetdsf() function fails to unreference the…
When was CVE-2026-65703 disclosed?
CVE-2026-65703 was first published in the National Vulnerability Database on July 23, 2026, with the most recent update on August 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-65703 actively exploited?
CVE-2026-65703 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 78.8% of all scored CVEs.
What is the CVSS score of CVE-2026-65703?
CVE-2026-65703 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-65703?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-65703, 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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