CVE WatchNov 9, 2026

CVE-2026-125257

FFmpeg through 9.0.2 contains an off-by-one heap overflow vulnerability in get_exponent_dynamic() in libavcodec/nellymoserenc.c that allows

CVSS

7.0

High

EPSS

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KEV

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Exploit Today

0-100

Published: Nov 9, 2026 · Last modified: Nov 9, 2026 · CWE-193

EPSS · 30d

Not enough EPSS history yet.

Technical description

FFmpeg through 9.0.2 contains an off-by-one heap overflow vulnerability in get_exponent_dynamic() in libavcodec/nellymoserenc.c that allows writing one element past the opt and path allocations. Attackers can supply crafted audio to applications encoding Nellymoser with trellis enabled, causing idx to equal OPT_SIZE and overwrite adjacent heap memory.

Official references

Related CVEs

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