FFmpeg 9.0 through 9.0.2 built with liblcevc_dec fails to validate LCEVC enhanced output dimensions against max_pixels in libavcodec/decode.c before frame allocation. Attackers can supply crafted H.264, HEVC or VVC streams declaring huge LCEVC resolutions to force oversized get_buffer2() allocations and exhaust memory.

Attack Vector Local

Attack Complexity High

Privileges Required None

Attack Requirements Present

User Interaction Passive

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
FFmpeg FFmpeg unaffected
Version Status Constraints
9.0 affected ≤ 9.0.2

No data.

No data.

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Project Subscriptions

Vendors Products
Ffmpeg Subscribe
Ffmpeg Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25408 cve-icon cve-icon
https://github.com/FFmpeg/FFmpeg cve-icon cve-icon
https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/decode.c#L1660 cve-icon cve-icon
https://github.com/FFmpeg/FFmpeg/commit/60b286521b46caa09792af04c6a4e3437aac8293 cve-icon cve-icon
https://www.vulncheck.com/advisories/ffmpeg-9.0-through-9.0.2-memory-exhaustion-via-lcevc-enhancement-dimensions cve-icon cve-icon
History

Mon, 09 Nov 2026 19:30:00 +0000

Type Values Removed Values Added
Description FFmpeg 9.0 through 9.0.2 built with liblcevc_dec fails to validate LCEVC enhanced output dimensions against max_pixels in libavcodec/decode.c before frame allocation. Attackers can supply crafted H.264, HEVC or VVC streams declaring huge LCEVC resolutions to force oversized get_buffer2() allocations and exhaust memory.
Title FFmpeg 9.0 through 9.0.2 Memory Exhaustion via LCEVC Enhancement Dimensions
First Time appeared Ffmpeg
Ffmpeg ffmpeg
Weaknesses CWE-789
CPEs cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*
Vendors & Products Ffmpeg
Ffmpeg ffmpeg
References
Metrics cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 5.7, 'vector': 'CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-09T20:56:48.418Z

Reserved: 2026-11-09T18:15:34.392Z

Link: CVE-2026-125263

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-09T20:18:12.803

Modified: 2026-11-09T20:18:12.803

Link: CVE-2026-125263

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-09T21:30:11Z

Weaknesses