SB2026031829 - Multiple vulnerabilities in libde265

Description

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds write (CVE-ID: CVE-2026-33165)

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

CVSSv4: 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/E:P/U:Green

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input. A remote attacker can use a specially crafted HEVC bitstream, trigger an out-of-bounds write and perform a denial of service (DoS) attack.

2) NULL pointer dereference (CVE-ID: CVE-2026-33164)

CWE-ID: CWE-476 - NULL Pointer Dereference

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in pic_parameter_set::set_derived_values() function. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://github.com/strukturag/libde265/security/advisories/GHSA-653q-9f73-8hvg
• https://github.com/strukturag/libde265/security/advisories/GHSA-wqrf-6rf5-v78r