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.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4440 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-4440-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/          Carlos Henrique Lima Melara     January 16, 2026                              https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : ffmpeg     Version        : 7:4.3.9-0+deb11u2     CVE ID         : CVE-2023-6603 CVE-2024-36615 CVE-2025-1594 CVE-2025-7700                      CVE-2025-9951 CVE-2025-10256 CVE-2025-63757     Debian Bug     :

    Several vulnerabilities have been discovered in the FFmpeg multimedia     framework, which could result in denial of service or potentially the     execution of arbitrary code if malformed files/streams are processed.

    CVE-2023-6603

        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.

    CVE-2024-36615

        FFmpeg n7.0 has a race condition vulnerability in the VP9 decoder. This         could lead to a data race if video encoding parameters were being exported,         as the side data would be attached in the decoder thread while being read         in the output thread.

    CVE-2025-1594

        A vulnerability, which was classified as critical, was found in FFmpeg up         to 7.1. This affects the function ff_aac_search_for_tns of the file         libavcodec/aacenc_tns.c of the component AAC Encoder. The manipulation         leads to stack-based buffer overflow. It is possible to initiate the attack         remotely. The exploit has been disclosed to the public and may be used.

    CVE-2025-7700

        A flaw was found in FFmpegs ALS audio decoder, where it does not properly         check for memory allocation failures. This can cause the application to         crash when processing certain malformed audio files. While it does not lead         to data theft or system control, it can be used to disrupt services and         cause a denial of service.

    CVE-2025-9951

        A heap-buffer-overflow write exists in jpeg2000dec FFmpeg which allows an         attacker to potentially gain remote code execution or cause denial of         service via the channel definition cdef atom of JPEG2000.

    CVE-2025-10256

        A NULL pointer dereference vulnerability exists in FFmpegs 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.

    CVE-2025-63757

        Integer overflow vulnerability in the yuv2ya16_X_c_template function in         libswscale/output.c in FFmpeg 8.0.

    For Debian 11 bullseye, these problems have been fixed in version     7:4.3.9-0+deb11u2.

    We recommend that you upgrade your ffmpeg packages.

    For the detailed security status of ffmpeg please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/ffmpeg

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Ubuntu 16.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-7890-1 advisory.

    It was discovered that FFmpeg did not properly handle the parsing of certain malformed HLS playlists. If a     user were tricked into opening a specially crafted HLS playlist, an attacker could possibly use this issue     to cause FFmpeg to crash, resulting in a denial of service.

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7830-1 advisory.

    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)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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.
    (CVE-2023-6603)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
291274	Debian dla-4440 : ffmpeg - security update	Nessus	Debian Local Security Checks	high
277318	Ubuntu 16.04 LTS : FFmpeg vulnerability (USN-7890-1)	Nessus	Ubuntu Local Security Checks	high
271190	Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : FFmpeg vulnerabilities (USN-7830-1)	Nessus	Ubuntu Local Security Checks	high
259764	Linux Distros Unpatched Vulnerability : CVE-2023-6603	Nessus	Misc.	high

Detections

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CVE-2023-6603

high

Tenable Plugins

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high

high

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