CVE-2026-12706

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-06-19. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

A use-after-free vulnerability was found in FFmpeg's RASC video decoder. The decode_move() function initializes a read pointer into a decompressed buffer, but a subsequent reallocation of that same buffer during move-table processing leaves the pointer dangling. An attacker could exploit this by providing a specially crafted AVI file containing a malicious RASC video stream. When a user opens or plays the file, the decoder reads from freed heap memory, which could lead to a denial of service (crash).

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

June 19, 2026

Last Modified

June 22, 2026

Advisory Details (4)

Auto-updated Jun 22, 2026
Patch available. Sources: redhat.
generic

[FFmpeg-devel,PR] avcodec/rasc: fix heap use-after-free in decode_move() (PR #22992) - Patchwork

https://patchwork.ffmpeg.org/project/ffmpeg/patch/177766314111.63.10674887811034989327@29965ddac10e/
generic

[FFmpeg-devel] [PR] avcodec/rasc: fix heap use-after-free in decode_move() (PR #22992) - ffmpeg-devel - lists.ffmpeg.org

https://lists.ffmpeg.org/archives/list/[email protected]/message/TTRIJZA7UL6KJTEDMMBGZPLLJERJ3EFX/
redhat

2490710 – (CVE-2026-12706) CVE-2026-12706 ffmpeg: ffmpeg: heap use-after-free read in RASC decoder decode_move()

https://bugzilla.redhat.com/show_bug.cgi?id=2490710
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-12706

Vendor Advisories for CVE-2026-12706(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 ... 7:5.1.8-0+deb12u1 (7 versions)7:5.1.9-0+deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:7.1.1-1, 7:7.1.2-0+deb13u1, 7:7.1.2-1, 7:7.1.3-0+deb13u1, 7:7.1.3-17:7.1.4-0+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
ffmpeg7:7.1.1-1 ... 7:8.1-3 (11 versions)7:8.1.1-1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 6× in last 7d / 48× 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 160 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-12706?
CVE-2026-12706 is a medium vulnerability published on June 19, 2026. A use-after-free vulnerability was found in FFmpeg's RASC video decoder. The decode_move() function initializes a read pointer into a decompressed buffer, but a subsequent reallocation of that same buffer during move-table processing leaves the pointer dangling. An attacker could exploit this by…
When was CVE-2026-12706 disclosed?
CVE-2026-12706 was first published in the National Vulnerability Database on June 19, 2026, with the most recent update on June 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-12706 actively exploited?
CVE-2026-12706 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 84.3% of all scored CVEs.
What is the CVSS score of CVE-2026-12706?
CVE-2026-12706 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-12706?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-12706, 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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