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[USN-8387-1] Inetutils vulnerabilities

Posted on 08 June 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8387-1
June 04, 2026

inetutils vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Several security issues were fixed in Inetutils.

Software Description:
- inetutils: Collection of common network programs

Details:

It was discovered that the Inetutils telnet daemon incorrectly handled
the CREDENTIALS_DIRECTORY environment variable. An attacker could possibly
use this issue to escalate privileges. (CVE-2026-28372)

It was discovered that the Inetutils telnet daemon did not properly
validate buffer bounds when processing LINEMODE SLC suboptions. An attacker
could possibly use this issue to cause a denial of service or execute
arbitrary code. (CVE-2026-32746)

It was discovered that the Inetutils telnet client incorrectly handled the
NEW_ENVIRON SEND USERVAR option. An attacker could possibly use this issue
to read arbitrary environment variables. (CVE-2026-32772)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 26.04 LTS
inetutils-ftp 2:2.7-2ubuntu1.1
inetutils-ftpd 2:2.7-2ubuntu1.1
inetutils-inetd 2:2.7-2ubuntu1.1
inetutils-ping 2:2.7-2ubuntu1.1
inetutils-syslogd 2:2.7-2ubuntu1.1
inetutils-talk 2:2.7-2ubuntu1.1
inetutils-talkd 2:2.7-2ubuntu1.1
inetutils-telnet 2:2.7-2ubuntu1.1
inetutils-telnetd 2:2.7-2ubuntu1.1
inetutils-tools 2:2.7-2ubuntu1.1
inetutils-traceroute 2:2.7-2ubuntu1.1
telnet 0.17+2.7-2ubuntu1.1
telnetd 0.17+2.7-2ubuntu1.1

Ubuntu 25.10
inetutils-ftp 2:2.6-1ubuntu3.2
inetutils-ftpd 2:2.6-1ubuntu3.2
inetutils-inetd 2:2.6-1ubuntu3.2
inetutils-ping 2:2.6-1ubuntu3.2
inetutils-syslogd 2:2.6-1ubuntu3.2
inetutils-talk 2:2.6-1ubuntu3.2
inetutils-talkd 2:2.6-1ubuntu3.2
inetutils-telnet 2:2.6-1ubuntu3.2
inetutils-telnetd 2:2.6-1ubuntu3.2
inetutils-tools 2:2.6-1ubuntu3.2
inetutils-traceroute 2:2.6-1ubuntu3.2
telnet 0.17+2.6-1ubuntu3.2
telnetd 0.17+2.6-1ubuntu3.2

Ubuntu 24.04 LTS
inetutils-ftp 2:2.5-3ubuntu4.2
inetutils-ftpd 2:2.5-3ubuntu4.2
inetutils-inetd 2:2.5-3ubuntu4.2
inetutils-ping 2:2.5-3ubuntu4.2
inetutils-syslogd 2:2.5-3ubuntu4.2
inetutils-talk 2:2.5-3ubuntu4.2
inetutils-talkd 2:2.5-3ubuntu4.2
inetutils-telnet 2:2.5-3ubuntu4.2
inetutils-telnetd 2:2.5-3ubuntu4.2
inetutils-tools 2:2.5-3ubuntu4.2
inetutils-traceroute 2:2.5-3ubuntu4.2
telnet 0.17+2.5-3ubuntu4.2
telnetd 0.17+2.5-3ubuntu4.2

Ubuntu 22.04 LTS
inetutils-ftp 2:2.2-2ubuntu0.2+esm1
Available with Ubuntu Pro
inetutils-ftpd 2:2.2-2ubuntu0.2+esm1
Available with Ubuntu Pro
inetutils-inetd 2:2.2-2ubuntu0.2+esm1
Available with Ubuntu Pro
inetutils-ping 2:2.2-2ubuntu0.2+esm1
Available with Ubuntu Pro
inetutils-syslogd 2:2.2-2ubuntu0.2+esm1
Available with Ubuntu Pro
inetutils-talk 2:2.2-2ubuntu0.2+esm1
Available with Ubuntu Pro
inetutils-talkd 2:2.2-2ubuntu0.2+esm1
Available with Ubuntu Pro
inetutils-telnet 2:2.2-2ubuntu0.2+esm1
Available with Ubuntu Pro
inetutils-telnetd 2:2.2-2ubuntu0.2+esm1
Available with Ubuntu Pro
inetutils-tools 2:2.2-2ubuntu0.2+esm1
Available with Ubuntu Pro
inetutils-traceroute 2:2.2-2ubuntu0.2+esm1
Available with Ubuntu Pro

Ubuntu 20.04 LTS
inetutils-ftp 2:1.9.4-11ubuntu0.2+esm4
Available with Ubuntu Pro
inetutils-ftpd 2:1.9.4-11ubuntu0.2+esm4
Available with Ubuntu Pro
inetutils-inetd 2:1.9.4-11ubuntu0.2+esm4
Available with Ubuntu Pro
inetutils-ping 2:1.9.4-11ubuntu0.2+esm4
Available with Ubuntu Pro
inetutils-syslogd 2:1.9.4-11ubuntu0.2+esm4
Available with Ubuntu Pro
inetutils-talk 2:1.9.4-11ubuntu0.2+esm4
Available with Ubuntu Pro
inetutils-talkd 2:1.9.4-11ubuntu0.2+esm4
Available with Ubuntu Pro
inetutils-telnet 2:1.9.4-11ubuntu0.2+esm4
Available with Ubuntu Pro
inetutils-telnetd 2:1.9.4-11ubuntu0.2+esm4
Available with Ubuntu Pro
inetutils-tools 2:1.9.4-11ubuntu0.2+esm4
Available with Ubuntu Pro
inetutils-traceroute 2:1.9.4-11ubuntu0.2+esm4
Available with Ubuntu Pro

Ubuntu 18.04 LTS
inetutils-ftp 2:1.9.4-3ubuntu0.1+esm5
Available with Ubuntu Pro
inetutils-ftpd 2:1.9.4-3ubuntu0.1+esm5
Available with Ubuntu Pro
inetutils-inetd 2:1.9.4-3ubuntu0.1+esm5
Available with Ubuntu Pro
inetutils-ping 2:1.9.4-3ubuntu0.1+esm5
Available with Ubuntu Pro
inetutils-syslogd 2:1.9.4-3ubuntu0.1+esm5
Available with Ubuntu Pro
inetutils-talk 2:1.9.4-3ubuntu0.1+esm5
Available with Ubuntu Pro
inetutils-talkd 2:1.9.4-3ubuntu0.1+esm5
Available with Ubuntu Pro
inetutils-telnet 2:1.9.4-3ubuntu0.1+esm5
Available with Ubuntu Pro
inetutils-telnetd 2:1.9.4-3ubuntu0.1+esm5
Available with Ubuntu Pro
inetutils-tools 2:1.9.4-3ubuntu0.1+esm5
Available with Ubuntu Pro
inetutils-traceroute 2:1.9.4-3ubuntu0.1+esm5
Available with Ubuntu Pro

Ubuntu 16.04 LTS
inetutils-ftp 2:1.9.4-1ubuntu0.1~esm6
Available with Ubuntu Pro
inetutils-ftpd 2:1.9.4-1ubuntu0.1~esm6
Available with Ubuntu Pro
inetutils-inetd 2:1.9.4-1ubuntu0.1~esm6
Available with Ubuntu Pro
inetutils-ping 2:1.9.4-1ubuntu0.1~esm6
Available with Ubuntu Pro
inetutils-syslogd 2:1.9.4-1ubuntu0.1~esm6
Available with Ubuntu Pro
inetutils-talk 2:1.9.4-1ubuntu0.1~esm6
Available with Ubuntu Pro
inetutils-talkd 2:1.9.4-1ubuntu0.1~esm6
Available with Ubuntu Pro
inetutils-telnet 2:1.9.4-1ubuntu0.1~esm6
Available with Ubuntu Pro
inetutils-telnetd 2:1.9.4-1ubuntu0.1~esm6
Available with Ubuntu Pro
inetutils-tools 2:1.9.4-1ubuntu0.1~esm6
Available with Ubuntu Pro
inetutils-traceroute 2:1.9.4-1ubuntu0.1~esm6
Available with Ubuntu Pro

Ubuntu 14.04 LTS
inetutils-ftp 2:1.9.2-1ubuntu0.1~esm4
Available with Ubuntu Pro
inetutils-ftpd 2:1.9.2-1ubuntu0.1~esm4
Available with Ubuntu Pro
inetutils-inetd 2:1.9.2-1ubuntu0.1~esm4
Available with Ubuntu Pro
inetutils-ping 2:1.9.2-1ubuntu0.1~esm4
Available with Ubuntu Pro
inetutils-syslogd 2:1.9.2-1ubuntu0.1~esm4
Available with Ubuntu Pro
inetutils-talk 2:1.9.2-1ubuntu0.1~esm4
Available with Ubuntu Pro
inetutils-talkd 2:1.9.2-1ubuntu0.1~esm4
Available with Ubuntu Pro
inetutils-telnet 2:1.9.2-1ubuntu0.1~esm4
Available with Ubuntu Pro
inetutils-telnetd 2:1.9.2-1ubuntu0.1~esm4
Available with Ubuntu Pro
inetutils-tools 2:1.9.2-1ubuntu0.1~esm4
Available with Ubuntu Pro
inetutils-traceroute 2:1.9.2-1ubuntu0.1~esm4
Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References:
https://ubuntu.com/security/notices/USN-8387-1
CVE-2026-28372, CVE-2026-32746, CVE-2026-32772

Package Information:
https://launchpad.net/ubuntu/+source/inetutils/2:2.7-2ubuntu1.1
https://launchpad.net/ubuntu/+source/inetutils/2:2.6-1ubuntu3.2
https://launchpad.net/ubuntu/+source/inetutils/2:2.5-3ubuntu4.2

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