CVE-2026-75147

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory published 2026-08-19. A secondary CVSS source baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.1EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 7.1Exploit: None knownExposed services: Not assessed

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

FFmpeg before commit 983dae9 contains an out-of-bounds read in the AV1 RTP packetizer (libavformat/rtpenc_av1.c). The keyframe detection loop that searches for a sequence header OBU advanced its pointer and remaining-size counter by the encoded header length plus the OBU payload size without first bounding the OBU size against the remaining data. A crafted OBU size causes the remaining-size counter to wrap to a positive value, causing the next loop iteration to dereference a pointer beyond the end of the packet buffer. A crafted AV1 input packet muxed to RTP triggers the out-of-bounds read.

CVSS v3
7.1
EG Score
7.1HIGHmedium confidence
EG Risk
32
EG Risk 32/100CISA 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
Severity71% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.1%
EPSS %ILE
1st
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

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 (2)

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

#24096 - avformat/rtpenc_av1: bound OBU size in the keyframe search loop - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24096
generic

avformat/rtpenc_av1: bound OBU size in the keyframe search loop · 983dae9c19 - FFmpeg/FFmpeg - FFmpeg Forgejo

https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/983dae9c19f46c87d597598c0fd2f2fcee0ad2f8

Vendor Advisories for CVE-2026-75147(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 21× in last 7d / 97× 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 161 total refreshes for this CVE.

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

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-75147?
CVE-2026-75147 is a high vulnerability published on August 19, 2026. FFmpeg before commit 983dae9 contains an out-of-bounds read in the AV1 RTP packetizer (libavformat/rtpenc_av1.c). The keyframe detection loop that searches for a sequence header OBU advanced its pointer and remaining-size counter by the encoded header length plus the OBU payload size without first…
When was CVE-2026-75147 disclosed?
CVE-2026-75147 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-2026-75147 actively exploited?
CVE-2026-75147 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (1st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-75147?
CVE-2026-75147 has a CVSS base score of 7.1 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-75147?
No fix for CVE-2026-75147 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-75147 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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