CVE-2025-46805

Publication date 8 May 2025

Last updated 26 January 2026

Ubuntu priority

Cvss 3 Severity Score

Description

Screen version 5.0.0 and older version 4 releases have a TOCTOU race potentially allowing to send SIGHUP, SIGCONT to privileged processes when installed setuid-root.

Read the notes from the security team

Why is this CVE low priority?

Ubuntu does not install screen setuid-root

Learn more about Ubuntu priority

Status

Show unmaintained releases

Package	Ubuntu Release	Status
screen	25.10 questing	Not affected
	25.04 plucky	Ignored end of life, was needs-triage
	24.10 oracular	Ignored end of life, was needs-triage
	24.04 LTS noble	Fixed 4.9.1-1ubuntu1
	22.04 LTS jammy	Fixed 4.9.0-1ubuntu0.1
	20.04 LTS focal	Needs evaluation
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Needs evaluation
	14.04 LTS trusty	Needs evaluation

Notes

mdeslaur

also affects older version when setuid-root Ubuntu does not install screen setuid-root, so marking this CVE as low.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
screen	Upstream: ?id=161

Severity score breakdown

Parameter	Value
Base score	5.5 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-7978-1
GNU Screen vulnerabilities
26 January 2026