CVE-2021-36411 Denial of service in n/a

What is CVE-2021-36411?

CVE-2021-36411 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 10 Jan 2022. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

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 deblock.cc has occurred. The vulnerability causes a segmentation fault and application crash, which leads to remote denial of service.

Weakness: CWE-125

Which versions are affected by CVE-2021-36411?

It affects 2 products.

Products include Debian Debian Linux, Struktur Libde265.

How do I fix CVE-2021-36411?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-36411 being exploited?

There is no known exploitation of CVE-2021-36411 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as ALPINE-CVE-2021-36411, DEBIAN-CVE-2021-36411, GHSA-hg2h-r57q-9hx4, UBUNTU-CVE-2021-36411.