Bug 2394495 (CVE-2025-10256)

Summary: CVE-2025-10256 ffmpeg: NULL pointer dereference in Firequalizer filter (libavfilter/af_firequalizer.c)
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: gtanzill, jbuscemi
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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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.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2394496, 2394497, 2394499, 2394502, 2394503, 2394500, 2394501    
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Description OSIDB Bzimport 2025-09-11 06:13:10 UTC 
A potential 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. If the memory allocation for s->dump_buf fails, the subsequent dereference of the returned pointer may cause a crash (denial of service).

The issue was introduced in commit d3be186ed1, which added the dumpfile and dumpscale options to the Firequalizer filter, but did not handle memory allocation failures for s->dump_buf.