CVE-2026-125239

FFmpeg through 9.0.2 Heap Buffer Overflow via HEVC DXVA Tile Parameters

FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in ff_dxva2_hevc_fill_picture_parameters() that allows attackers to corrupt memory via unbounded non-uniform tile counts. Attackers can supply crafted HEVC bitstreams with many non-uniformly spaced tiles to write controlled 16-bit values past fixed-size DXVA arrays during DXVA2, D3D11VA, or D3D12VA decoding on Windows.

Public vulnerability details

Record state: Published
Published (UTC): 2026-11-09T19:11:48.669Z
Last updated (UTC): 2026-11-09T19:11:48.669Z
Assigned by: VulnCheck
CVSS score: 7.3 (CVSS v4.0, from VulnCheck)
Severity: HIGH
CISA KEV: No KEV entry in this record. This does not show that the CVE is absent from the KEV catalog.
Additional data from: None

FHE assessment

No FHE assessment is available in this application yet. This does not mean FHE cannot mitigate an impact of this CVE.

References

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25136 (VulnCheck)
https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/dxva2_hevc.c#L151 (VulnCheck)
https://github.com/FFmpeg/FFmpeg (VulnCheck)
VulnCheck Advisory: FFmpeg through 9.0.2 Heap Buffer Overflow via HEVC DXVA Tile Parameters (VulnCheck)

Source

CVE JSON 5.2 record from the CVE List archive 2026-11-09_delta_CVEs_at_end_of_day.zip, which covers changes through 2026-11-10T00:00:00.000Z. Imported 2026-11-10T16:59:46.967Z.