========================================================================== Ubuntu Security Notice USN-8573-1 July 20, 2026
libde265 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in libde265.
Software Description:
- libde265: Open source implementation of the h.265 video codec
Details:
It was discovered that libde265 did not properly manage memory under
certain circumstances. An attacker could possibly use this issue to
cause libde265 to crash, resulting in a denial of service. This issue
only affected Ubuntu 22.04 LTS. (CVE-2023-51792)
It was discovered that libde265 did not properly handle certain
malformed media files, leading to a heap buffer overflow. An attacker
could possibly use this issue to cause libde265 to crash, resulting in
a denial of service. (CVE-2024-38949, CVE-2024-38950)
It was discovered that libde265 did not properly handle certain
malformed input, leading to a segmentation fault. An attacker could
possibly use this issue to cause libde265 to crash, resulting in a
denial of service. (CVE-2025-61147)
It was discovered that libde265 did not properly handle a malformed
H.265 PPS NAL unit, leading to a segmentation fault. An attacker could
possibly use this issue to cause libde265 to crash, resulting in a
denial of service. (CVE-2026-33164)
It was discovered that libde265 did not properly handle certain
crafted HEVC bitstreams, leading to an out-of-bounds write. An attacker
could possibly use this issue to cause libde265 to crash, resulting in
a denial of service. (CVE-2026-33165)
Valentin Mercier discovered that libde265 did not properly validate
tile geometry when handling crafted media files, leading to an
out-of-bounds read. An attacker could possibly use this issue to cause
libde265 to crash, resulting in a denial of service, or to obtain
sensitive information. (CVE-2026-45382)
It was discovered that libde265 did not properly validate certain
values when decoding crafted media files, leading to an out-of-bounds
read. An attacker could possibly use this issue to cause libde265 to
crash, resulting in a denial of service, or to obtain sensitive
information. (CVE-2026-45383)
Ying Dong discovered that libde265 did not properly validate reference
picture set entries when handling a crafted H.265 bitstream, leading to
an out-of-bounds write. An attacker could possibly use this issue to
cause libde265 to crash, resulting in a denial of service, or possibly
execute arbitrary code. (CVE-2026-49295)
Ying Dong discovered that libde265 did not properly manage memory when
handling a crafted sequence of H.265 NAL units, leading to excessive
memory consumption. An attacker could possibly use this issue to cause
libde265 to use excessive resources, leading to a denial of service.
(CVE-2026-49337)
Ying Dong discovered that libde265 did not properly handle certain
crafted H.265 bitstreams with large dimensions, leading to a heap
buffer overflow. An attacker could possibly use this issue to cause
libde265 to crash, resulting in a denial of service, or possibly
execute arbitrary code. (CVE-2026-49346)
It was discovered that libde265 did not properly handle certain crafted
HEVC bitstreams with large dimensions, leading to an out-of-bounds
read and write. An attacker could possibly use this issue to cause
libde265 to crash, resulting in a denial of service, or possibly
execute arbitrary code. (CVE-2026-54240)
It was discovered that libde265 did not properly handle certain crafted
HEVC bitstreams with large dimensions, leading to a heap buffer
overflow. An attacker could possibly use this issue to cause libde265
to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2026-54241)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 26.04 LTS
libde265-0 1.0.16-1ubuntu0.1~esm1
Available with Ubuntu Pro
libde265-dev 1.0.16-1ubuntu0.1~esm1
Available with Ubuntu Pro
Ubuntu 24.04 LTS
libde265-0 1.0.15-1ubuntu0.1
libde265-dev 1.0.15-1ubuntu0.1
Ubuntu 22.04 LTS
libde265-0 1.0.8-1ubuntu0.3+esm2
Available with Ubuntu Pro
libde265-dev 1.0.8-1ubuntu0.3+esm2
Available with Ubuntu Pro
Ubuntu 20.04 LTS
libde265-0 1.0.4-1ubuntu0.4+esm2
Available with Ubuntu Pro
libde265-dev 1.0.4-1ubuntu0.4+esm2
Available with Ubuntu Pro
Ubuntu 18.04 LTS
libde265-0 1.0.2-2ubuntu0.18.04.1~esm6
Available with Ubuntu Pro
libde265-dev 1.0.2-2ubuntu0.18.04.1~esm6
Available with Ubuntu Pro
Ubuntu 16.04 LTS
libde265-0 1.0.2-2ubuntu0.16.04.1~esm6
Available with Ubuntu Pro
libde265-dev 1.0.2-2ubuntu0.16.04.1~esm6
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8573-1
CVE-2024-38949, CVE-2024-38950, CVE-2025-61147, CVE-2026-33164,
CVE-2026-33165, CVE-2026-45382, CVE-2026-45383, CVE-2026-49295,
CVE-2026-49337, CVE-2026-49346, CVE-2026-54240, CVE-2026-54241
Package Information:
https://launchpad.net/ubuntu/+source/libde265/1.0.15-1ubuntu0.1
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