CVE-2026-65703

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source
Trending — 4 sources updated this week

Also known asEUVD-2026-48370 (ENISA EUVD) · GHSA-x3xw-4qcq-c6mr (GitHub Security Advisories)Source: ENISA EUVD

7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
21st
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-27). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track 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). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 23, 2026

Last Modified

October 24, 2026

Advisory Details (3)

Auto-updated Jul 23, 2026
Patch available.
Web page

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
Web page

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

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/fd3ee52fab34d98a95b787d0b5ff45685766200c
Web page

#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.

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulibswscale-ffmpeg3 (7:2.8.17-0ubuntu0.1+esm17) @ xenial2026-10-27ubuntu
ubuntulibswscale9 (7:8.0.1-3ubuntu2+esm4) @ resolute2026-10-27ubuntu

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.

All Vendor Advisories

(2)

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 14× in last 7d / 55× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 278 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 178 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  2. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  3. 2026-10-27 21:05 UTCEG score recompute
  4. 2026-10-27 21:05 UTCVendor advisory
  5. 2026-10-27 21:05 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  6. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  7. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  8. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  9. 2026-10-25 14:11 UTCEG score recompute
  10. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  11. 2026-10-24 15:26 UTCEG score recompute
  12. 2026-10-24 15:26 UTCVendor advisory
  13. 2026-10-24 15:26 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  14. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  15. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  16. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  17. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  18. 2026-10-20 09:09 UTCEG score recompute
  19. 2026-10-20 09:08 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  20. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  21. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  22. 2026-10-18 03:21 UTCEG score recompute
  23. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  24. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  25. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
Show 75 more
  1. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  3. 2026-10-13 11:10 UTCEG score recompute
  4. 2026-10-13 11:10 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  5. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  6. 2026-10-12 15:46 UTCEG score recompute
  7. 2026-10-11 19:31 UTCEG score recompute
  8. 2026-10-11 16:47 UTCEG score recompute
  9. 2026-10-11 14:08 UTCEG score recompute
  10. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  13. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  15. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  16. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  17. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  18. 2026-10-04 08:20 UTCEG score recompute
  19. 2026-10-04 08:20 UTCVendor advisory
  20. 2026-10-04 08:20 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  21. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  22. 2026-10-03 03:24 UTCEG score recompute
  23. 2026-10-03 03:24 UTCVendor advisory
  24. 2026-10-03 03:24 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  25. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  26. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  27. 2026-10-01 06:16 UTCEG score recompute
  28. 2026-10-01 06:16 UTCVendor advisory
  29. 2026-10-01 06:16 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  30. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  31. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  32. 2026-09-28 05:04 UTCEG score recompute
  33. 2026-09-28 05:04 UTCVendor advisory
  34. 2026-09-28 05:04 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  35. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  36. 2026-09-24 01:12 UTCEG score recompute
  37. 2026-09-24 01:12 UTCVendor advisory
  38. 2026-09-24 01:12 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  39. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  40. 2026-09-23 11:20 UTCVendor advisory
  41. 2026-09-23 11:20 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  42. 2026-09-22 22:42 UTCEG score recompute
  43. 2026-09-22 22:42 UTCVendor advisory
  44. 2026-09-22 22:42 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  45. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  46. 2026-09-20 01:46 UTCEG score recompute
  47. 2026-09-20 01:46 UTCVendor advisory
  48. 2026-09-20 01:46 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  49. 2026-09-18 22:31 UTCEG score recompute
  50. 2026-09-18 22:31 UTCVendor advisory
  51. 2026-09-18 22:30 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  52. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  53. 2026-09-18 03:04 UTCEG score recompute
  54. 2026-09-18 03:04 UTCVendor advisory
  55. 2026-09-18 03:04 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  56. 2026-09-17 02:01 UTCEG score recompute
  57. 2026-09-17 02:01 UTCVendor advisory
  58. 2026-09-17 02:01 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  59. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  60. 2026-09-16 06:46 UTCEG score recompute
  61. 2026-09-16 06:46 UTCVendor advisory
  62. 2026-09-16 06:45 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  63. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 9th percentile
  64. 2026-09-14 11:00 UTCVendor advisory
  65. 2026-09-14 11:00 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  66. 2026-09-13 22:22 UTCEG score recompute
  67. 2026-09-13 22:22 UTCVendor advisory
  68. 2026-09-13 22:22 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  69. 2026-09-13 06:59 UTCVendor advisory
  70. 2026-09-13 06:59 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  71. 2026-09-12 18:03 UTCEG score recompute
  72. 2026-09-12 18:02 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  73. 2026-09-12 05:21 UTCVendor advisory
  74. 2026-09-12 05:21 UTCGHSA enrichmentGHSA-x3xw-4qcq-c6mr · GitHub severity HIGH · GitHub CVSS 7.8
  75. 2026-09-11 16:42 UTCEG score recompute

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

Frequently asked(5)

What is CVE-2026-65703?
CVE-2026-65703 is a high-severity vulnerability; its CVE record was 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 made public?
CVE-2026-65703 was made public on July 13, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on July 23, 2026. EchelonGraph's copy of the record carries a last-modified date of October 24, 2026; the record at its source may have been updated since.
Is CVE-2026-65703 actively exploited?
CVE-2026-65703 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (21st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-65703?
CVE-2026-65703 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-65703?
A fix for CVE-2026-65703 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-65703 are linked in the Vendor Advisories panel on this page.

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