CVE-2026-41054

Publication date 20 May 2026

Last updated 2 June 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.8 · High

Score breakdown

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

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

CVSS version: CVSS v3.0

Base score 7.8 · 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)

Other references

Access our resources on patching vulnerabilities