Debian Security Advisory

DLA-3240-1 libde265 -- LTS security update

Date Reported:
15 Dec 2022
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 1014977.
In Mitre's CVE dictionary: CVE-2020-21599, CVE-2021-35452, CVE-2021-36408, CVE-2021-36409, CVE-2021-36410, CVE-2021-36411.
More information:

Multiple issues were found in libde265, an open source implementation of the h.265 video codec, which may result in denial of or have unspecified other impact.

  • CVE-2020-21599

    libde265 v1.0.4 contains a heap buffer overflow in the de265_image::available_zscan function, which can be exploited via a crafted a file.

  • CVE-2021-35452

    An Incorrect Access Control vulnerability exists in libde265 v1.0.8 due to a SEGV in

  • CVE-2021-36408

    libde265 v1.0.8 contains a Heap-use-after-free in intrapred.h when decoding file using dec265.

  • CVE-2021-36409

    There is an Assertion `scaling_list_pred_matrix_id_delta==1' failed at in libde265 v1.0.8 when decoding file, which allows attackers to cause a Denial of Service (DoS) by running the application with a crafted file or possibly have unspecified other impact.

  • CVE-2021-36410

    A stack-buffer-overflow exists in libde265 v1.0.8 via in function put_epel_hv_fallback when running program dec265.

  • CVE-2021-36411

    An issue has been found in libde265 v1.0.8 due to incorrect access control. A SEGV caused by a READ memory access in function derive_boundaryStrength of has occurred. The vulnerability causes a segmentation fault and application crash, which leads to remote denial of service.

For Debian 10 buster, these problems have been fixed in version 1.0.3-1+deb10u1.

We recommend that you upgrade your libde265 packages.

For the detailed security status of libde265 please refer to its security tracker page at:

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: