[USN-8394-1] YARD vulnerability
[USN-8253-2] Postfix vulnerability
[USN-8383-1] Tomcat vulnerabilities
[USN-8385-1] Robocode vulnerabilities
[USN-8394-1] YARD vulnerability
==========================================================================
Ubuntu Security Notice USN-8394-1
June 05, 2026
yard vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
YARD could be made to expose sensitive information over the network.
Software Description:
- yard: A documentation generation tool for the Ruby programming language
Details:
It was discovered that YARD incorrectly sanitized paths in its built-in
documentation server. An attacker could possibly use this issue to read arbitrary
files from the server host.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 26.04 LTS
yard 0.9.38-1ubuntu0.1~esm1
Available with Ubuntu Pro
yard-doc 0.9.38-1ubuntu0.1~esm1
Available with Ubuntu Pro
Ubuntu 24.04 LTS
yard 0.9.36-1ubuntu0.1~esm1
Available with Ubuntu Pro
yard-doc 0.9.36-1ubuntu0.1~esm1
Available with Ubuntu Pro
Ubuntu 22.04 LTS
yard 0.9.26-1ubuntu0.1+esm1
Available with Ubuntu Pro
yard-doc 0.9.26-1ubuntu0.1+esm1
Available with Ubuntu Pro
Ubuntu 20.04 LTS
yard 0.9.24-1+deb11u1ubuntu0.1~esm1
Available with Ubuntu Pro
yard-doc 0.9.24-1+deb11u1ubuntu0.1~esm1
Available with Ubuntu Pro
Ubuntu 18.04 LTS
yard 0.9.12-2ubuntu0.1~esm2
Available with Ubuntu Pro
yard-doc 0.9.12-2ubuntu0.1~esm2
Available with Ubuntu Pro
Ubuntu 16.04 LTS
yard 0.8.7.6+git20160220-3ubuntu0.1~esm2
Available with Ubuntu Pro
yard-doc 0.8.7.6+git20160220-3ubuntu0.1~esm2
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8394-1
CVE-2026-41493
[USN-8253-2] Postfix vulnerability
==========================================================================
Ubuntu Security Notice USN-8253-2
June 03, 2026
postfix vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary:
Postfix could be made to crash if it received specially crafted network
traffic.
Software Description:
- postfix: High-performance mail transport agent
Details:
USN-8253-1 fixed a vulnerability in Postfix. This update provides the
corresponding fix for Postfix on Ubuntu 14.04 LTS, Ubuntu 16.04 LTS,
Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS.
Original advisory details:
Kamil Frankowicz discovered that Postfix incorrectly handled certain
enhanced status codes. A remote attacker could possibly use this issue to
cause Postfix to crash, resulting in a denial of service.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS
postfix 3.4.13-0ubuntu1.4+esm1
Available with Ubuntu Pro
Ubuntu 18.04 LTS
postfix 3.3.0-1ubuntu0.4+esm4
Available with Ubuntu Pro
Ubuntu 16.04 LTS
postfix 3.1.0-3ubuntu0.4+esm4
Available with Ubuntu Pro
Ubuntu 14.04 LTS
postfix 2.11.0-1ubuntu1.2+esm4
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8253-2
https://ubuntu.com/security/notices/USN-8253-1
CVE-2026-43964
[USN-8383-1] Tomcat vulnerabilities
==========================================================================
Ubuntu Security Notice USN-8383-1
June 04, 2026
tomcat6, tomcat7 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in Tomcat.
Software Description:
- tomcat7: Servlet and JSP engine
- tomcat6: Servlet and JSP engine
Details:
It was discovered that Tomcat incorrectly handled digest
authentication. A remote attacker could possibly use this issue to
bypass authentication restrictions. (CVE-2026-43512)
It was discovered that Tomcat incorrectly handled case sensitivity
in LockOutRealm. A remote attacker could possibly use this issue to
bypass account lockout protections and obtain sensitive information.
(CVE-2026-43513)
It was discovered that Tomcat incorrectly handled authorization when
multiple method constraints defined the same HTTP method. A remote
attacker could possibly use this issue to bypass authorization
restrictions. (CVE-2026-43515)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 16.04 LTS
libtomcat7-java 7.0.68-1ubuntu0.4+esm4
Available with Ubuntu Pro
tomcat7 7.0.68-1ubuntu0.4+esm4
Available with Ubuntu Pro
Ubuntu 14.04 LTS
libtomcat6-java 6.0.39-1ubuntu0.1+esm3
Available with Ubuntu Pro
libtomcat7-java 7.0.52-1ubuntu0.16+esm2
Available with Ubuntu Pro
tomcat6 6.0.39-1ubuntu0.1+esm3
Available with Ubuntu Pro
tomcat7 7.0.52-1ubuntu0.16+esm2
Available with Ubuntu Pro
After a standard system update you need to restart Tomcat to make
all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8383-1
CVE-2026-43512, CVE-2026-43513, CVE-2026-43515
[USN-8385-1] Robocode vulnerabilities
==========================================================================
Ubuntu Security Notice USN-8385-1
June 04, 2026
robocode vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in Robocode.
Software Description:
- robocode: An engaging and educational programming game
Details:
It was discovered that Robocode could be tricked into making network
requests to attacker-controlled systems. An attacker could possibly use
this issue to cause external service interaction, resulting in
information disclosure. This issue only affected Ubuntu 16.04 LTS and
Ubuntu 18.04 LTS. (CVE-2019-10648)
Lim Sim Yee discovered that Robocode did not properly validate file
paths in the CacheCleaner component. An attacker could possibly use this
issue to delete arbitrary files. (CVE-2025-14306)
Lim Sim Yee discovered that Robocode did not securely create temporary
files in the AutoExtract component. An attacker could possibly use this
issue to manipulate temporary files, resulting in arbitrary code
execution. (CVE-2025-14307)
Lim Sim Yee discovered that Robocode did not properly validate data
lengths in the Buffer class. An attacker could possibly use this issue
to trigger an integer overflow, resulting in arbitrary code execution.
(CVE-2025-14308)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 26.04 LTS
robocode 1.9.3.9-4ubuntu0.26.04.1~esm1
Available with Ubuntu Pro
Ubuntu 24.04 LTS
robocode 1.9.3.9-3ubuntu0.1~esm1
Available with Ubuntu Pro
Ubuntu 22.04 LTS
robocode 1.9.3.9-2ubuntu0.1~esm1
Available with Ubuntu Pro
Ubuntu 20.04 LTS
robocode 1.9.3.7-1ubuntu0.1~esm1
Available with Ubuntu Pro
Ubuntu 18.04 LTS
robocode 1.9.3.1-1ubuntu0.1~esm1
Available with Ubuntu Pro
Ubuntu 16.04 LTS
robocode 1.9.2.5-2ubuntu0.1~esm1
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-8385-1
CVE-2019-10648, CVE-2025-14306, CVE-2025-14307, CVE-2025-14308
