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Ubuntu 26.04 LTS haveged Critical Exec Privilege Escalation USN-8358-1

ubuntu
Calendar Grey June 1, 2026
Dist Ubuntu Esm H88
A critical security issue in haveged for Ubuntu allows local attackers to run commands as administrators.
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 critical privilege escalation Ubuntu administration 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
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-8358-1

Topics%20covered

Topics Covered

security advisory critical privilege escalation Ubuntu administration 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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