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Ubuntu 26.04 LTS haveged Important Local Attack Escalation CVE-2026-41054

ubuntu
Calendar Grey June 1, 2026
Dist Ubuntu Esm H88
Update your Ubuntu installation to address critical haveged issue allowing local privilege escalation. Read more for details.
haveged could be made to run programs as an administrator.

Summary

haveged could be made to run programs as an administrator.

Software Description:

- haveged: userspace entropy daemon

Details:

It was discovered that haveged incorrectly handled credential

checks on its control socket. A local attacker could possibly

use this issue to execute privileged commands.

Topics%20covered

Topics Covered

security advisory privilege escalation Ubuntu important local attack haveged

Update Instructions

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

Ubuntu 26.04 LTS
  haveged                         1.9.19-14ubuntu0.1
  libhavege2                      1.9.19-14ubuntu0.1

Ubuntu 25.10
  haveged                         1.9.19-12+deb13u1build0.25.10.1
  libhavege2                      1.9.19-12+deb13u1build0.25.10.1

Ubuntu 24.04 LTS
  haveged                         1.9.14-1ubuntu2+esm1~24.04.1
                                  Available with Ubuntu Pro
  libhavege2                      1.9.14-1ubuntu2+esm1~24.04.1
                                  Available with Ubuntu Pro

Ubuntu 22.04 LTS
  haveged                         1.9.14-1ubuntu1+esm1~22.04.1
                                  Available with Ubuntu Pro
  libhavege2                      1.9.14-1ubuntu1+esm1~22.04.1
                                  Available with Ubuntu Pro

After a standard system update you need to restart haveged to make
all the necessary changes.

References

https://ubuntu.com/security/notices/USN-8358-1

CVE-2026-41054

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8358-1

Topics%20covered

Topics Covered

security advisory privilege escalation Ubuntu important local attack haveged

Package Information

https://launchpad.net/ubuntu/+source/haveged/1.9.19-14ubuntu0.1
https://launchpad.net/ubuntu/+source/haveged/1.9.19-12+deb13u1build0.25.10.1

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