CVE-2021-26676 Information disclosure in n/a

What is CVE-2021-26676?

CVE-2021-26676 is a medium-severity 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

gdhcp in ConnMan before 1.39 could be used by network-adjacent attackers to leak sensitive stack information, allowing further exploitation of bugs in gdhcp.

Which versions are affected by CVE-2021-26676?

It affects 3 products.

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

How do I fix CVE-2021-26676?

Upgrade to a fixed version.

Is CVE-2021-26676 being exploited?

There is no known exploitation of CVE-2021-26676 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-VF39439, DEBIAN-CVE-2021-26676, GHSA-6x7w-v26q-jfv3, UBUNTU-CVE-2021-26676.