CVE-2026-12706

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH 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
Trending — 3 sources updated this week
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 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(high)
EPSS
15.6%
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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 49× 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. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 15:53 UTCEG score recompute
  3. 2026-07-06 15:53 UTCGHSA enrichment
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-05 14:13 UTCEG score recompute
  6. 2026-07-05 14:13 UTCGHSA enrichment
  7. 2026-07-05 02:30 UTCEPSS rescore
  8. 2026-07-05 02:30 UTCEPSS rescore
  9. 2026-07-04 12:33 UTCEG score recompute
  10. 2026-07-04 12:33 UTCGHSA enrichment
  11. 2026-07-03 10:54 UTCEG score recompute
  12. 2026-07-03 10:54 UTCGHSA enrichment
  13. 2026-07-02 09:08 UTCEG score recompute
  14. 2026-07-02 09:08 UTCGHSA enrichment
  15. 2026-07-01 15:06 UTCEPSS rescore
  16. 2026-07-01 15:06 UTCEPSS rescore
  17. 2026-07-01 07:23 UTCEG score recompute
  18. 2026-07-01 07:23 UTCGHSA enrichment
  19. 2026-06-30 23:22 UTCEPSS rescore
  20. 2026-06-30 05:43 UTCEG score recompute
  21. 2026-06-30 05:42 UTCGHSA enrichment
  22. 2026-06-29 14:06 UTCEPSS rescore
  23. 2026-06-29 04:03 UTCEG score recompute
  24. 2026-06-29 04:02 UTCGHSA enrichment
  25. 2026-06-28 14:07 UTCEPSS rescore
Show 24 more
  1. 2026-06-28 04:56 UTCEPSS rescore
  2. 2026-06-28 04:56 UTCEPSS rescore
  3. 2026-06-28 02:19 UTCEG score recompute
  4. 2026-06-28 02:19 UTCGHSA enrichment
  5. 2026-06-27 03:08 UTCEPSS rescore
  6. 2026-06-27 00:40 UTCEG score recompute
  7. 2026-06-27 00:40 UTCGHSA enrichment
  8. 2026-06-25 22:59 UTCEG score recompute
  9. 2026-06-25 22:59 UTCGHSA enrichment
  10. 2026-06-25 13:49 UTCEPSS rescore
  11. 2026-06-24 21:20 UTCEG score recompute
  12. 2026-06-24 21:20 UTCGHSA enrichment
  13. 2026-06-24 14:05 UTCEPSS rescore
  14. 2026-06-23 21:32 UTCEPSS rescore
  15. 2026-06-23 19:41 UTCEG score recompute
  16. 2026-06-23 19:41 UTCGHSA enrichment
  17. 2026-06-22 18:02 UTCEG score recompute
  18. 2026-06-22 18:02 UTCGHSA enrichment
  19. 2026-06-21 16:18 UTCEG score recompute
  20. 2026-06-21 16:17 UTCGHSA enrichment
  21. 2026-06-20 14:36 UTCEG score recompute
  22. 2026-06-20 14:36 UTCGHSA enrichment
  23. 2026-06-19 12:55 UTCEG score recompute
  24. 2026-06-19 12:55 UTCGHSA enrichment

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 15.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
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

Explore the affected products and dependency analysis for CVE-2026-12706

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