FFmpeg versions from 0.5 up to, but not including, 9.0 contain an uninitialized heap memory disclosure vulnerability in the native TIFF decoder in libavcodec/tiff.c. An attacker who can cause FFmpeg to decode a crafted TIFF file can supply a valid Deflate-compressed strip that terminates successfully after producing fewer bytes than the declared strip requires. The tiff_unpack_zlib() function allocates a heap buffer sized for the full declared strip but copies all declared rows via memcpy() regardless of how many bytes zlib actually decompressed, causing unwritten bytes that can contain stale data from prior heap allocations to be incorporated into decoded image output and potentially exposing sensitive data in persistent services.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4150-1 advisory.

    - CVE-2026-58049: incorrect validation in the RASC video decoder can lead to an out-of-bounds heap write     and memory       corruption (bsc#1269550).
    - CVE-2026-64833: Out-of-Bounds Read via S/PDIF Muxer spdifenc.c (bsc#1272755).
    - CVE-2026-64834: Infinite Loop DoS via RTP/ASF Demuxer (bsc#1272757).
    - CVE-2026-65703: Out-of-Bounds Write in TDSC Video Decoder (bsc#1272759).
    - CVE-2026-65704: Out-of-Bounds Write via TY Demuxer and Shorten Decoder (bsc#1272760).
    - CVE-2026-65705: vf_floodfill Out-of-Bounds Write via filter_frame() (bsc#1272761).
    - CVE-2026-65706: vf_swaprect Out-of-Bounds Write via NV12 Frame Processing (bsc#1272762).
    - CVE-2026-66036: Heap Out-of-Bounds Write in vf_hqdn3d Filter (bsc#1272763).
    - CVE-2026-70628: signed integer underflows during subtitle buffer checks can cause heap buffer overflows     (bsc#1274268).
    - CVE-2026-70629: unvalidated decompressed frame sizes in video decoders can cause uninitialized heap     memory reads       (bsc#1274270).
    - CVE-2026-70630: unvalidated decompression sizes in Screenpresso frame decoding can cause uninitialized     heap memory       reads (bsc#1274282).
    - CVE-2026-70631: unvalidated decompression sizes in TIFF strip decoding can cause uninitialized heap     memory reads       (bsc#1274287).
    - CVE-2026-70632: unenforced frame dimensions in CineForm HD decoding can cause heap-based out-of-bounds     writes       (bsc#1274289).
    - CVE-2026-75142: stack buffer overflow in the MPEG-PS muxer (bsc#1276408).
    - CVE-2026-75143: heap buffer overflow in the RIST protocol reader (bsc#1276409).
    - CVE-2026-75144: heap buffer overflow in the VC-2/Dirac RTP packetizer (bsc#1276410).
    - CVE-2026-75146: out-of-bounds read in the DASH demuxer (bsc#1276412).

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-2026:4149-1 advisory.

    - CVE-2026-58049: incorrect validation in the RASC video decoder can lead to an out-of-bounds heap write     and memory       corruption (bsc#1269550).
    - CVE-2026-64833: Out-of-Bounds Read via S/PDIF Muxer spdifenc.c (bsc#1272755).
    - CVE-2026-64834: Infinite Loop DoS via RTP/ASF Demuxer (bsc#1272757).
    - CVE-2026-65703: Out-of-Bounds Write in TDSC Video Decoder (bsc#1272759).
    - CVE-2026-65704: Out-of-Bounds Write via TY Demuxer and Shorten Decoder (bsc#1272760).
    - CVE-2026-65705: vf_floodfill Out-of-Bounds Write via filter_frame() (bsc#1272761).
    - CVE-2026-65706: vf_swaprect Out-of-Bounds Write via NV12 Frame Processing (bsc#1272762).
    - CVE-2026-66036: Heap Out-of-Bounds Write in vf_hqdn3d Filter (bsc#1272763).
    - CVE-2026-70628: signed integer underflows during subtitle buffer checks can cause heap buffer overflows     (bsc#1274268).
    - CVE-2026-70629: unvalidated decompressed frame sizes in video decoders can cause uninitialized heap     memory reads       (bsc#1274270).
    - CVE-2026-70630: unvalidated decompression sizes in Screenpresso frame decoding can cause uninitialized     heap memory       reads (bsc#1274282).
    - CVE-2026-70631: unvalidated decompression sizes in TIFF strip decoding can cause uninitialized heap     memory reads       (bsc#1274287).
    - CVE-2026-70632: unenforced frame dimensions in CineForm HD decoding can cause heap-based out-of-bounds     writes       (bsc#1274289).
    - CVE-2026-75142: stack buffer overflow in the MPEG-PS muxer (bsc#1276408).
    - CVE-2026-75143: heap buffer overflow in the RIST protocol reader (bsc#1276409).
    - CVE-2026-75144: heap buffer overflow in the VC-2/Dirac RTP packetizer (bsc#1276410).
    - CVE-2026-75146: out-of-bounds read in the DASH demuxer (bsc#1276412).

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 Ubuntu 20.04 LTS / 22.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8750-1 advisory.

    Seung Min Shin discovered that FFmpeg did not correctly handle certain memory operations. If a user or     automated system were tricked into opening a specially crafted file, an attacker could cause a denial of     service. (CVE-2026-12706)

    Xinghang Lv discovered that FFmpeg did not correctly handle certain memory operations. If a user or     automated system were tricked into opening a specially crafted file, an attacker could cause a denial of     service. (CVE-2026-30999)

    It was discovered that FFmpeg did not correctly handle certain memory operations. If a user or automated     system were tricked into opening a specially crafted file, an attacker could cause a denial of service.
    (CVE-2026-58049)

    Adrian Junge discovered that FFmpeg did not correctly handle certain memory operations. If a user or     automated system were tricked into opening a specially crafted file, an attacker could leak sensitive     information. (CVE-2026-70629, CVE-2026-70630, CVE-2026-70631)

    Ori Hollander discovered that FFmpeg did not correctly handle certain memory operations. If a user or     automated system were tricked into opening a specially crafted file, an attacker could possibly cause a     denial of service or execute arbitrary code. (CVE-2026-8461)

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 Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-106174 advisory.

    FFmpeg versions from 0.5 up to, but not including, 9.0 contain an uninitialized heap memory disclosure     vulnerability in the native TIFF decoder in libavcodec/tiff.c. An attacker who can cause FFmpeg to decode     a crafted TIFF file can supply a valid Deflate-compressed strip that terminates successfully after     producing fewer bytes than the declared strip requires. The tiff_unpack_zlib() function allocates a heap     buffer sized for the full declared strip but copies all declared rows via memcpy() regardless of how many     bytes zlib actually decompressed, causing unwritten bytes that can contain stale data from prior heap     allocations to be incorporated into decoded image output and potentially exposing sensitive data in     persistent services.

Tenable has extracted the preceding description block directly from the Unity Linux 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 version of FFmpeg installed on the remote host is 0.5 or later but prior to 9.0. It is, therefore, affected by multiple vulnerabilities:

  - A signed integer overflow vulnerability in the DVB subtitle parser in libavcodec/dvbsub_parser.c allows     attackers to trigger a heap buffer overflow by supplying a crafted WTV file, resulting in an out-of-bounds     heap write and potential memory corruption or code execution. (CVE-2026-70628)

  - An uninitialized heap memory disclosure vulnerability in the native TIFF decoder in libavcodec/tiff.c allows     attackers to expose stale heap data by supplying a crafted TIFF file with a Deflate-compressed strip that     produces fewer bytes than declared. (CVE-2026-70631)

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 versions from 0.5 up to, but not including, 9.0 contain an uninitialized heap memory disclosure     vulnerability in the native TIFF decoder in libavcodec/tiff.c. An attacker who can cause FFmpeg to decode     a crafted TIFF file can supply a valid Deflate-compressed strip that terminates successfully after     producing fewer bytes than the declared strip requires. The tiff_unpack_zlib() function allocates a heap     buffer sized for the full declared strip but copies all declared rows via memcpy() regardless of how many     bytes zlib actually decompressed, causing unwritten bytes that can contain stale data from prior heap     allocations to be incorporated into decoded image output and potentially exposing sensitive data in     persistent services. (CVE-2026-70631)

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

ID	Name	Product	Family	Type	Severity
346223	SUSE SLES15: libavcodec58_134 / libavformat58_76 / libavutil56_70 / etc (SUSE-SU-2026:4150-1)	Nessus	SuSE Local Security Checks	Local	critical
346205	SUSE SLED15: ffmpeg-4 / ffmpeg-4-libavcodec-devel / ffmpeg-4-libavdevice-devel / etc (SUSE-SU-2026:4149-1)	Nessus	SuSE Local Security Checks	Local	critical
345735	Ubuntu 20.04 LTS / 22.04 LTS : FFmpeg vulnerabilities (USN-8750-1)	Nessus	Ubuntu Local Security Checks	Local	high
342874	Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: ffmpeg (UTSA-2026-106174)	Nessus	Unity Linux Local Security Checks	Local	medium
335156	FFmpeg 0.5 < 9.0 Multiple Vulnerabilities	Nessus	Misc.	Local	high
333325	Linux Distros Unpatched Vulnerability : CVE-2026-70631	Nessus	Misc.	Local	medium

Detections

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CVE-2026-70631

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