# CVE-2026-125183: FFmpeg through 9.0.2 Denial of Service via HEVC PPS 3D Extension Parsing

Status: published. Published: 2026-11-09. Updated: 2026-11-09.

FFmpeg through 9.0.2 contains a denial of service vulnerability in pps_3d_extension() in libavcodec/hevc/ps.c that allows attackers to exhaust CPU through unbounded depth lookup table loops. Attackers can supply crafted HEVC files with repeated PPS NAL units that trigger hundreds of millions of bit skips, stalling decoders, parsers, and ffprobe.

## Remediation

- fix: The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches. (source: CNA: VulnCheck) — https://github.com/FFmpeg/FFmpeg/commit/f9f732b444a2fc27dcc4fe52084d3d435f827864

## Affected products and versions

- FFmpeg / FFmpeg (ffmpeg/ffmpeg): ≥ 0; ≤ 9.0.2 (affected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 6.8 (medium); CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 5.5 (medium); CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-834

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25572 (CNA: VulnCheck; issue-tracking)

- https://github.com/FFmpeg/FFmpeg/commit/f9f732b444a2fc27dcc4fe52084d3d435f827864 (CNA: VulnCheck; patch)

- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/hevc/ps.c#L1963 (CNA: VulnCheck; technical-description)

- https://github.com/FFmpeg/FFmpeg (CNA: VulnCheck; product)

- https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-denial-of-service-via-hevc-pps-3d-extension-parsing (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-125183; retrieved 2026-11-09; source updated 2026-11-09

Revision: 5f0eb819fb83b338d730d4183abd11c23ebf9d87784a5cc5606e75f19c2b4b37

Canonical: https://y2.dev/cve/CVE-2026-125183

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