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: 0.2%CVSS: 5.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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
5.8MEDIUMmedium confidence
EG Risk
26
EG Risk 26/100CISA 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
Severity58% × 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
4th
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 19, 2026

Last Modified

August 31, 2026

Advisory Details (3)

Auto-updated Aug 19, 2026
Patch available.
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 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.

Data Freshness Timeline

(refreshed 18× in last 7d / 76× 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 137 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

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 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 0.2% probability of exploitation in the next 30 days (4th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-75145?
CVE-2026-75145 has a CVSS base score of 5.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-75145?
A fix for CVE-2026-75145 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-75145 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-75145

Explore →

Is Your Infrastructure Affected by CVE-2026-75145?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs