SB2026090404 - Multiple vulnerabilities in libde265

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Main Vulnerability Database SB2026090404

SB2026090404 - Multiple vulnerabilities in libde265

Published: September 4, 2026

Security Bulletin ID SB2026090404
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 4
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 75% Low 25%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 4 vulnerabilities.


1) Memory leak (CVE-ID: CVE-2026-49337)

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to missing release of memory for orphaned slice headers in read_slice_NAL when processing crafted NAL input. A remote attacker can cause a victim to process specially crafted NAL input to cause a denial of service.


2) Inefficient Algorithmic Complexity (CVE-ID: N/A)

CWE-ID: CWE-407 - Inefficient Algorithmic Complexity

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to algorithmic complexity in the NAL parser functions remove_stuffing_bytes and resize when processing a crafted NAL unit. A remote attacker can provide a crafted NAL unit to cause a denial of service.

User interaction is required.


3) Out-of-bounds write (CVE-ID: CVE-2026-49295)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to an out-of-bounds write in process_reference_picture_set when processing a predicted short-term reference picture set. A remote attacker can provide a specially crafted predicted short-term reference picture set to cause a denial of service.

User interaction is required.


4) Heap-based buffer overflow (CVE-ID: CVE-2026-49346)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service or modify data.

The vulnerability exists due to a heap-based buffer overflow caused by an integer overflow in de265_image_get_buffer when processing SPS dimensions. A remote attacker can supply a crafted HEVC bitstream to cause a denial of service or modify data.

User interaction is required.


Remediation

Install update from vendor's website.

References