CVE-2026-41054

Publication date 20 May 2026

Last updated 2 June 2026

Ubuntu priority

Cvss 3 Severity Score

Description

In `src/havegecmd.c`, the `socket_handler` function performs a credential check on the abstract UNIX socket (`\0/sys/entropy/haveged`). However, while it detects if the connecting user is not root (`cred.uid != 0`) and prepares a negative acknowledgement (`ASCII_NAK`), it **fails to stop execution**. The code proceeds to the `switch` statement, allowing any local unprivileged user to execute privileged commands such as `MAGIC_CHROOT`.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
haveged	26.04 LTS resolute	Fixed 1.9.19-14ubuntu0.1
	25.10 questing	Fixed 1.9.19-12+deb13u1build0.25.10.1
	24.04 LTS noble	Fixed 1.9.14-1ubuntu2+esm1~24.04.1
	22.04 LTS jammy	Fixed 1.9.14-1ubuntu1+esm1~22.04.1
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	14.04 LTS trusty	Not affected

Get expanded security coverage with Ubuntu Pro

Reduce your average CVE exposure time from 98 days to 1 day with expanded CVE patching, ten-years security maintenance and optional support for the full stack of open-source applications. Free for personal use.

Get Ubuntu Pro 30-day free trial

Severity score breakdown

Parameter	Value
Base score	7.8 · High
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Related Ubuntu Security Notices (USN)

USN-8358-1
haveged vulnerability
1 June 2026