CVE-2023-6603 — Ffmpeg: null pointer dereference in ffmpeg hls parsing

Affected: FFmpeg

A flaw was found in FFmpeg's HLS playlist parsing. This vulnerability allows a denial of service via a maliciously crafted HLS playlist that triggers a null pointer dereference during initialization.

USN-7830-1 — ffmpeg vulnerabilities

Affected: Ubuntu:Pro:18.04:LTS: ffmpeg, Ubuntu:Pro:20.04:LTS: ffmpeg, Ubuntu:Pro:22.04:LTS: ffmpeg, Ubuntu:Pro:24.04:LTS: ffmpeg

It was discovered that FFmpeg incorrectly handled the return values of functions in its Firequalizer filter and in the HTTP Live Streaming (HLS) implementation, leading to a NULL pointer dereference. If a user was tricked into loading a crafted media file, a remote attacker could possibly use this issue to make FFmpeg crash, resulting in a denial of service. (CVE-2023-6603, CVE-2025-10256)

It was discovered that FFmpeg did not enforce an input format before triggering the HTTP demuxer. A remote attacker could possibly use this issue to perform a Server-Side Request Forgery (SSRF) attack. (CVE-2025-6605)

It was discovered that FFmpeg incorrectly handled memory allocation in the ALS audio decoder. If a user was tricked into loading a crafted media file, a remote attacker could possibly use this issue to make FFmpeg crash, resulting in a denial of service. (CVE-2025-7700)

It was discovered that FFmpeg incorrectly handled memory in the JPEG 2000 decoder, which could lead to a heap buffer overflow. If a user or application were tricked into opening a specially crafted file, an attacker could possibly use this issue to cause a denial of service or leak sensitive information. (CVE-2025-9951)

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CVE-2023-6603 — Ffmpeg: null pointer dereference in ffmpeg hls parsing

USN-7830-1 — ffmpeg vulnerabilities