FFmpeg through 8.1.2, fixed in commit 8670835, contains an information disclosure vulnerability in the LCL/ZLIB video decoder that allows attackers to expose uninitialized heap memory by supplying a valid zlib stream that inflates to fewer bytes than the expected frame size. The zlib_decomp() function in lcldec.c treats short decompression as non-fatal and continues to the RGB24 conversion path, which copies a full frame's worth of rows from the allocation buffer using original frame dimensions, causing uninitialized heap contents including pointer-derived allocator bytes to be copied into the attacker-observable AVFrame output and potentially defeating ASLR in long-lived media processing services.

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-8671-1 advisory.

    Adrian Junge was discovered that FFmpeg incorrectly handled certain media files. An attacker could     possibly use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-66036,     CVE-2026-66039)

    Adrian Junge discovered that FFmpeg incorrectly handled certain media files. An attacker could possibly     use this issue to obtain sensitive information. (CVE-2026-66038)

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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - FFmpeg through 8.1.2, fixed in commit 8670835, contains an information disclosure vulnerability in the
    LCL/ZLIB video decoder that allows attackers to expose uninitialized heap memory by supplying a valid zlib
    stream that inflates to fewer bytes than the expected frame size. The zlib_decomp() function in lcldec.c
    treats short decompression as non-fatal and continues to the RGB24 conversion path, which copies a full
    frame's worth of rows from the allocation buffer using original frame dimensions, causing uninitialized
    heap contents including pointer-derived allocator bytes to be copied into the attacker-observable AVFrame
    output and potentially defeating ASLR in long-lived media processing services. (CVE-2026-66038)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-3e109a0c85 advisory.

    Latest upstream bugfix release from 8.1 branch. Changes:
    https://code.ffmpeg.org/FFmpeg/FFmpeg/src/branch/release/8.1/Changelog .























Tenable has extracted the preceding description block directly from the Fedora 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 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8738-1 advisory.

    It was discovered that FFmpeg incorrectly handled certain video frames when using the hqdn3d filter. An     attacker could possibly use this issue to cause a denial of service or execute arbitrary code.
    (CVE-2026-66036)

    Adrian Junge discovered that FFmpeg incorrectly handled certain compressed video files. An attacker could     possibly use this issue to expose sensitive information. (CVE-2026-66038)

    Adrian Junge discovered that FFmpeg incorrectly handled certain audio files. An attacker could possibly     use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-66039)

    Adrian Junge discovered that FFmpeg incorrectly handled certain subtitle files. An attacker could possibly     use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-70628)

    Adrian Junge discovered that FFmpeg incorrectly handled certain video files. An attacker could possibly     use this issue to cause a denial of service or execute arbitrary code. (CVE-2026-70632)

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 remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21572-1 advisory.

    - CVE-2026-64830: Heap Buffer Overflow via VobSub Subtitle Demuxer (bsc#1272752).
    - CVE-2026-64832: Double-Free in NVDEC Hardware Decoder via nvdec.c (bsc#1272754).
    - CVE-2026-64835: Out-of-Bounds Memory Access in ADX Audio Decoder (bsc#1272758).
    - CVE-2026-66038: LCL/ZLIB Video Decoder Information Disclosure via lcldec.c (bsc#1272768).
    - CVE-2026-66039: MACE6 Audio Decoder Heap Out-of-Bounds Write via CAF File (bsc#1272765).
    - CVE-2026-66041: Heap Out-of-Bounds Write via vf_quirc Filter (bsc#1272767).

Tenable has extracted the preceding description block directly from the SUSE 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 SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3542-1 advisory.

    Update to release 4.4.8.

    - CVE-2026-8461: out-of-bounds write in the MagicYUV decoder can lead to denial of service or remote code     execution       (bsc#1269490).
    - CVE-2026-12706: heap use-after-free read in the RASC video decoder can lead to denial of service     (bsc#1268595).
    - CVE-2026-64830: heap buffer overflow in the VobSub subtitle demuxer can lead to arbitrary code execution       (bsc#1272752).
    - CVE-2026-64832: double-free in the NVIDIA NVDEC hardware decoder can lead to can lead to memory     corruption       (bsc#1272754).
    - CVE-2026-64835: out-of-bounds memory access in the ADX audio decoder can lead to information disclosure     and memory       corruption (bsc#1272758).
    - CVE-2026-66038: exposure of uninitialized heap memory by the LCL/ZLIB video decoder can lead to     sensitive information       disclosure (bsc#1272768).
    - CVE-2026-66039: signed integer overflow in the MACE6 audio decoder can lead to heap corruption and     arbitrary code       execution (bsc#1272765).

    Other updates and bugfixes:

    - Release 4.4.8
      * Various bug fixes to codecs
      * avcodec/magicyuv: Fix 1 line MEDIAN slices
      * avcodec/magicyuv: Expand the s->interlaced slice-height sanity check
      * avcodec/magicyuv: reject slice_height misaligned with chroma vshift

Tenable has extracted the preceding description block directly from the SUSE 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 SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:3529-1 advisory.

    Update to release 4.4.8.

    - CVE-2026-8461: out-of-bounds write in the MagicYUV decoder can lead to denial of service or remote code     execution       (bsc#1269490).
    - CVE-2026-12706: heap use-after-free read in the RASC video decoder can lead to denial of service     (bsc#1268595).
    - CVE-2026-64830: heap buffer overflow in the VobSub subtitle demuxer can lead to arbitrary code execution       (bsc#1272752).
    - CVE-2026-64832: double-free in the NVIDIA NVDEC hardware decoder can lead to can lead to memory     corruption       (bsc#1272754).
    - CVE-2026-64835: out-of-bounds memory access in the ADX audio decoder can lead to information disclosure     and memory       corruption (bsc#1272758).
    - CVE-2026-66038: exposure of uninitialized heap memory by the LCL/ZLIB video decoder can lead to     sensitive information       disclosure (bsc#1272768).
    - CVE-2026-66039: signed integer overflow in the MACE6 audio decoder can lead to heap corruption and     arbitrary code       execution (bsc#1272765).

    Other updates and bugfixes:

    - Release 4.4.8
      * Various bug fixes to codecs
      * avcodec/magicyuv: Fix 1 line MEDIAN slices
      * avcodec/magicyuv: Expand the s->interlaced slice-height sanity check
      * avcodec/magicyuv: reject slice_height misaligned with chroma vshift

Tenable has extracted the preceding description block directly from the SUSE 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 openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21522-1 advisory.

    Changes in ffmpeg-4:

    - CVE-2026-64835: Out-of-Bounds Memory Access in ADX Audio Decoder (bsc#1272758)
    - CVE-2026-64832: Double-Free in NVDEC Hardware Decoder via nvdec.c (bsc#1272754)
    - CVE-2026-64830: Heap Buffer Overflow via VobSub Subtitle Demuxer (bsc#1272752)
    - CVE-2026-66038: LCL/ZLIB Video Decoder Information Disclosure via lcldec.c (bsc#1272768)
    - CVE-2026-66039: MACE6 Audio Decoder Heap Out-of-Bounds Write via CAF File (bsc#1272765)

Tenable has extracted the preceding description block directly from the SUSE 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.

  - FFmpeg through 8.1.2, fixed in commit 8670835, contains an information disclosure vulnerability in the     LCL/ZLIB video decoder that allows attackers to expose uninitialized heap memory by supplying a valid zlib     stream that inflates to fewer bytes than the expected frame size. The zlib_decomp() function in lcldec.c     treats short decompression as non-fatal and continues to the RGB24 conversion path, which copies a full     frame's worth of rows from the allocation buffer using original frame dimensions, causing uninitialized     heap contents including pointer-derived allocator bytes to be copied into the attacker-observable AVFrame     output and potentially defeating ASLR in long-lived media processing services. (CVE-2026-66038)

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

ID	Name	Product	Family	Type	Severity
365453	Ubuntu 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS : FFmpeg vulnerabilities (USN-8671-1)	Nessus	Ubuntu Local Security Checks	Local	high
457223	Echo: ffmpeg: security update to 7:7.1.5-0+deb13u1+e3	Tenable Cloud Security	Echo Local Security Checks	Local	high
457223	Echo: ffmpeg: security update to 7:7.1.5-0+deb13u1+e3	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
358433	Fedora 44 : ffmpeg (2026-3e109a0c85)	Nessus	Fedora Local Security Checks	Local	critical
344612	Ubuntu 26.04 LTS : FFmpeg vulnerabilities (USN-8738-1)	Nessus	Ubuntu Local Security Checks	Local	high
335498	openSUSE 16: ffmpeg-7 / ffmpeg-7-libavcodec-devel / ffmpeg-7-libavdevice-devel / etc (openSUSE-SU-2026:21572-1)	Nessus	SuSE Local Security Checks	Local	high
334789	SUSE SLED15: ffmpeg-4 / ffmpeg-4-libavcodec-devel / ffmpeg-4-libavdevice-devel / etc (SUSE-SU-2026:3542-1)	Nessus	SuSE Local Security Checks	Local	high
333552	SUSE SLES15: libavcodec58_134 / libavformat58_76 / libavutil56_70 / etc (SUSE-SU-2026:3529-1)	Nessus	SuSE Local Security Checks	Local	high
332106	openSUSE 16: ffmpeg-4 / ffmpeg-4-libavcodec-devel / ffmpeg-4-libavdevice-devel / etc (openSUSE-SU-2026:21522-1)	Nessus	SuSE Local Security Checks	Local	high
329734	Linux Distros Unpatched Vulnerability : CVE-2026-66038	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-66038

high

Tenable Plugins

high

high

high

critical

high

high

high

high

high

high