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Tool Directory

CVE-2023-24626

MediumPublished

socket.c in GNU Screen through 4.9.0, when installed setuid or setgid (the default on platforms such as Arch Linux and FreeBSD), allows local users to send...

Published: Apr 8, 2023
Updated: May 9, 2025
Assigning CNA: mitre
Evidence observed: Apr 5, 2023

Primary CVSS

6.5/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

EPSS probability estimate

0.5%

Low · next 30 days

Percentile: 44.1%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

socket.c in GNU Screen through 4.9.0, when installed setuid or setgid (the default on platforms such as Arch Linux and FreeBSD), allows local users to send a privileged SIGHUP signal to any PID, causing a denial of service or disruption of the target process.

Sources

GNU screen v4.9.0 - Privilege EscalationExploit
Manuel Andreas · linux · Apr 5, 2023

Responsible use

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