CVE-2026-75145

MEDIUMPre-NVD 5.85.8—
EchelonGraph scoreMEDIUM confidence

Score 5.8 from GitHub Security Advisory published 2026-08-19. a secondary CVSS source baseline 5.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.8EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.8Exploit: None knownExposed: 0

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

FFmpeg before commit b4c199c contains an incorrect integer narrowing conversion in the AV1 RTP packetizer (libavformat/rtpenc_av1.c). The OBU size is cast to long before comparison against the remaining frame size. On targets where long is 32 bits, including 64-bit Windows, sufficiently large OBU size values are sign-flipped by the narrowing cast, producing a negative value that passes the payload size check. This allows an oversized OBU to bypass the safety bound on affected platforms, leading to out-of-bounds memory access when the oversized value is subsequently used as a copy length.

CVSS v3
5.8
EG Score
5.8(medium)
EG Risk
26(Track)
EG Risk 26/100SSVC: 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
Severity58% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

August 19, 2026

Last Modified

August 31, 2026

Advisory Details (3)

Auto-updated Aug 19, 2026
No patch confirmed yet.
generic

FFmpeg Integer Narrowing Conversion OOB Memory Access in AV1 RTP Packetizer | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ffmpeg-integer-narrowing-conversion-oob-memory-access-in-av1-rtp-packetizer
generic

#24090 - avformat/rtpenc_av1: do not narrow the OBU size to (long) - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24090
generic

avformat/rtpenc_av1: do not narrow the OBU size to (long) · b4c199c590 - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/b4c199c5906ff53368926c2a5839881f41957e7f

Vendor Advisories for CVE-2026-75145(1)

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

Affected Packages

(1 across 1 ecosystem)
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.

Data Freshness Timeline

(refreshed 18× in last 7d / 83× 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.

  1. 2026-09-19 10:15 UTCEG score recompute
  2. 2026-09-19 10:15 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 11:14 UTCGHSA enrichment
  5. 2026-09-17 13:15 UTCGHSA enrichment
  6. 2026-09-16 15:16 UTCEG score recompute
  7. 2026-09-16 15:16 UTCGHSA enrichment
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 05:15 UTCEPSS rescore
  10. 2026-09-15 17:16 UTCEG score recompute
  11. 2026-09-15 17:16 UTCGHSA enrichment
  12. 2026-09-15 03:12 UTCEPSS rescore
  13. 2026-09-14 19:16 UTCGHSA enrichment
  14. 2026-09-13 19:34 UTCEG score recompute
  15. 2026-09-13 19:34 UTCGHSA enrichment
  16. 2026-09-12 21:35 UTCEG score recompute
  17. 2026-09-12 21:35 UTCGHSA enrichment
  18. 2026-09-12 15:02 UTCEPSS rescore
  19. 2026-09-11 23:35 UTCEG score recompute
  20. 2026-09-11 23:35 UTCGHSA enrichment
  21. 2026-09-11 14:53 UTCEPSS rescore
  22. 2026-09-11 00:24 UTCEG score recompute
  23. 2026-09-11 00:24 UTCGHSA enrichment
  24. 2026-09-10 09:35 UTCEPSS rescore
  25. 2026-09-10 01:17 UTCGHSA enrichment
Show 61 more
  1. 2026-09-09 03:18 UTCEG score recompute
  2. 2026-09-09 03:18 UTCGHSA enrichment
  3. 2026-09-08 22:01 UTCEPSS rescore
  4. 2026-09-08 05:20 UTCEG score recompute
  5. 2026-09-08 05:20 UTCGHSA enrichment
  6. 2026-09-07 07:19 UTCEG score recompute
  7. 2026-09-07 07:18 UTCGHSA enrichment
  8. 2026-09-06 13:48 UTCEPSS rescore
  9. 2026-09-06 09:17 UTCGHSA enrichment
  10. 2026-09-05 11:14 UTCEG score recompute
  11. 2026-09-05 11:14 UTCGHSA enrichment
  12. 2026-09-04 13:10 UTCEG score recompute
  13. 2026-09-04 13:10 UTCGHSA enrichment
  14. 2026-09-04 05:07 UTCEPSS rescore
  15. 2026-09-03 15:09 UTCGHSA enrichment
  16. 2026-09-02 16:46 UTCGHSA enrichment
  17. 2026-09-01 18:42 UTCEG score recompute
  18. 2026-09-01 18:41 UTCGHSA enrichment
  19. 2026-09-01 13:54 UTCEPSS rescore
  20. 2026-09-01 04:40 UTCEPSS rescore
  21. 2026-09-01 04:40 UTCEPSS rescore
  22. 2026-08-31 20:41 UTCGHSA enrichment
  23. 2026-08-31 00:32 UTCEG score recompute
  24. 2026-08-31 00:32 UTCGHSA enrichment
  25. 2026-08-30 19:18 UTCEPSS rescore
  26. 2026-08-30 19:17 UTCEPSS rescore
  27. 2026-08-30 02:32 UTCEG score recompute
  28. 2026-08-30 02:32 UTCGHSA enrichment
  29. 2026-08-30 01:22 UTCEPSS rescore
  30. 2026-08-29 04:33 UTCEG score recompute
  31. 2026-08-29 04:33 UTCGHSA enrichment
  32. 2026-08-28 21:42 UTCEPSS rescore
  33. 2026-08-28 06:25 UTCEG score recompute
  34. 2026-08-28 06:25 UTCGHSA enrichment
  35. 2026-08-27 14:25 UTCEPSS rescore
  36. 2026-08-27 08:26 UTCEG score recompute
  37. 2026-08-27 08:26 UTCGHSA enrichment
  38. 2026-08-26 14:47 UTCEPSS rescore
  39. 2026-08-26 10:23 UTCEG score recompute
  40. 2026-08-26 10:23 UTCGHSA enrichment
  41. 2026-08-25 13:49 UTCEPSS rescore
  42. 2026-08-25 12:23 UTCGHSA enrichment
  43. 2026-08-24 14:21 UTCEG score recompute
  44. 2026-08-24 14:20 UTCGHSA enrichment
  45. 2026-08-24 14:18 UTCEPSS rescore
  46. 2026-08-23 16:21 UTCGHSA enrichment
  47. 2026-08-22 18:22 UTCEG score recompute
  48. 2026-08-22 18:22 UTCGHSA enrichment
  49. 2026-08-21 23:49 UTCEPSS rescore
  50. 2026-08-21 20:23 UTCEG score recompute
  51. 2026-08-21 20:23 UTCGHSA enrichment
  52. 2026-08-21 19:59 UTCEG score recompute
  53. 2026-08-21 19:59 UTCGHSA enrichment
  54. 2026-08-21 13:38 UTCEG score recompute
  55. 2026-08-21 13:37 UTCGHSA enrichment
  56. 2026-08-20 22:56 UTCEPSS rescore
  57. 2026-08-20 15:37 UTCEG score recompute
  58. 2026-08-20 15:37 UTCGHSA enrichment
  59. 2026-08-19 17:38 UTCEG score recompute
  60. 2026-08-19 16:43 UTCEG score recompute
  61. 2026-08-19 16:43 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-75145?
CVE-2026-75145 is a medium vulnerability published on August 19, 2026. FFmpeg before commit b4c199c contains an incorrect integer narrowing conversion in the AV1 RTP packetizer (libavformat/rtpenc_av1.c). The OBU size is cast to long before comparison against the remaining frame size. On targets where long is 32 bits, including 64-bit Windows, sufficiently large OBU…
When was CVE-2026-75145 disclosed?
CVE-2026-75145 was first published in the National Vulnerability Database on August 19, 2026, with the most recent update on August 31, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-75145 actively exploited?
CVE-2026-75145 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 98.1% of all scored CVEs.
What is the CVSS score of CVE-2026-75145?
CVE-2026-75145 has a CVSS v3 base score of 5.8 (NVD).
How do I remediate CVE-2026-75145?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-75145, 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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