CVE-2026-107676
LOWCVSS 3.3Description
FFmpeg through 9.0.2 contains an uninitialized memory disclosure vulnerability in av_dynamic_hdr_plus_to_t35() that leaves up to three payload bytes uninitialized when tone_mapping_flag is 0. Attackers can supply crafted Matroska T.35 BlockAdditional or HEVC/AV1 SEI metadata so that remuxing or transcoding writes leaked process memory into output files.
Timeline
Published:October 8th, 2026 4:17 PM
Last modified:October 14th, 2026 11:55 PM
CVSS Scoring
CVSS v3: 3.3 (LOW)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Affected Software
From NVD CPE configuration data
Vendors
ffmpeg
Products
ffmpeg
Weaknesses (CWE)
References & Reports
Advisories, patches, and third-party reports
- https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/2c2f6e96e31795ae95a8f8323a493ffbc493111fPatch
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24590Issue Tracking
- https://ffmpeg.org/Product
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavutil/hdr_dynamic_metadata.c#L374-L385Product
- https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-uninitialized-memory-disclosure-via-hdr10-metadata-serializerThird Party Advisory
Source: NIST NVD · Data may lag official sources by up to one minute