CVE-2021-23239 Race condition in n/a

What is CVE-2021-23239?

CVE-2021-23239 is a low-severity vulnerability in Debian Debian Linux, published on 12 Jan 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The sudoedit personality of Sudo before 1.9.5 may allow a local unprivileged user to perform arbitrary directory-existence tests by winning a sudo_edit.c race condition in replacing a user-controlled directory by a symlink to an arbitrary path.

Weakness: CWE-59

Which versions are affected by CVE-2021-23239?

It affects 6 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Netapp Cloud Backup, Netapp Hci Management Node, Netapp Solidfire, Sudo Project Sudo.

How do I fix CVE-2021-23239?

Upgrade to a fixed version.

Is CVE-2021-23239 being exploited?

There is no known exploitation of CVE-2021-23239 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-2021-23239, DEBIAN-CVE-2021-23239, DLA-3181-1, GHSA-wfrc-r682-56qv, UBUNTU-CVE-2021-23239.