What’s Vulnerable › Vulnerabilities

CVE-2025-10256: Ffmpeg: null pointer dereference in firequalizer filter (libavfilter/af_firequalizer.c)

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-18 · updated 2026-06-17
• Weakness: CWE-476

Description

A NULL pointer dereference vulnerability exists in FFmpeg’s Firequalizer filter (libavfilter/af_firequalizer.c) due to a missing check on the return value of av_malloc_array() in the config_input() function. An attacker could exploit this by tricking a victim into processing a crafted media file with the Firequalizer filter enabled, causing the application to dereference a NULL pointer and crash, leading to denial of service.

Affected products

• FFmpeg: from 3.2 before 8.0 — fixed in 8.0

How to fix

Upgrade to a fixed version: FFmpeg 8.0. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/security/cve/CVE-2025-10256
• https://bugzilla.redhat.com/show_bug.cgi?id=2394495
• https://github.com/FFmpeg/FFmpeg/commit/a25462482c02c004d685a8fcf2fa63955aaa0931
• https://github.com/FFmpeg/FFmpeg/commit/d3be186ed1bcdcf2c093d6b13a0e66dc5132be2a

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