libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.17, a malformed H.265 PPS NAL unit causes a segmentation fault in pic_parameter_set::set_derived_values(). This issue has been patched in version 1.0.17.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4550 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-4550-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                   Andreas Henriksson     April 27, 2026                                https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : libde265     Version        : 1.0.11-0+deb11u4     CVE ID         : CVE-2023-51792 CVE-2026-33164 CVE-2026-33165     Debian Bug     : 1131468 1131469

    It was found that libde265, an open source implementation of the H.265 video     codec, had multiple vulnerabilities which could lead to both stack and heap     out of bound writes that could lead to denial of service, etc.

    For Debian 11 bullseye, these problems have been fixed in version     1.0.11-0+deb11u4.

    We recommend that you upgrade your libde265 packages.

    For the detailed security status of libde265 please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/libde265

    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.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1585 advisory.

    libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.17, a malformed     H.265 PPS NAL unit causes a segmentation fault in pic_parameter_set::set_derived_values(). This issue has     been patched in version 1.0.17. (CVE-2026-33164)

    libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.17, a crafted     HEVC bitstream causes an out-of-bounds heap write confirmed by AddressSanitizer. The trigger is a stale     ctb_info.log2unitSize after an SPS change where PicWidthInCtbsY and PicHeightInCtbsY stay constant but     Log2CtbSizeY changes, causing set_SliceHeaderIndex to index past the allocated image metadata array and     write 2 bytes past the end of a heap allocation. This issue has been patched in version 1.0.17.
    (CVE-2026-33165)

Tenable has extracted the preceding description block directly from the tested product 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.

  - libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.17, a malformed     H.265 PPS NAL unit causes a segmentation fault in pic_parameter_set::set_derived_values(). This issue has     been patched in version 1.0.17. (CVE-2026-33164)

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

ID	Name	Product	Family	Severity
310419	Debian dla-4550 : libde265-0 - security update	Nessus	Debian Local Security Checks	high
306214	Amazon Linux 2023 : libde265, libde265-devel (ALAS2023-2026-1585)	Nessus	Amazon Linux Local Security Checks	high
303275	Linux Distros Unpatched Vulnerability : CVE-2026-33164	Nessus	Misc.	high

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