CVE-2026-125175mediumCWE-908

CVE-2026-125175: medium-severity vulnerability in FFmpeg

FFmpeg through 9.0.2 Information Disclosure via Flash Screen Video Decoder

Published

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10Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 4.8
FFmpeg through 9.0.2 contains an information disclosure vulnerability in flashsv_decode_block() in libavcodec/flashsv.c that copies uninitialized heap memory into decoded frames when inflate output is short. Attackers can supply a crafted FLV with an FSV1 stream whose zlib block data decompresses short, then recover heap contents from the decoded or re-encoded output.
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Affected products
FFmpeg · FFmpeg
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In the same product, most dangerous first.

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