CVE-2021-26675 Memory corruption in n/a

What is CVE-2021-26675?

CVE-2021-26675 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 9 Feb 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A stack-based buffer overflow in dnsproxy in ConnMan before 1.39 could be used by network adjacent attackers to execute code.

Weakness: CWE-787

Which versions are affected by CVE-2021-26675?

It affects 3 products.

Products include Debian Debian Linux, Intel Connman, Opensuse Leap.

How do I fix CVE-2021-26675?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2021-26675 being exploited?

There is no known exploitation of CVE-2021-26675 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 CLEANSTART-2024-IF16479, DEBIAN-CVE-2021-26675, GHSA-p5r5-rf4r-f8jm, UBUNTU-CVE-2021-26675.