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CentOS Linux 7 [TuxCare] Security Update: screen (CENTOS7:CLSA-2026:1776934758)

medium Nessus Plugin ID 360951

Synopsis

The CentOS Linux host is missing one or more security updates.

Description

The CentOS Linux 7 host has a package installed that is affected by a vulnerability as referenced in the TuxCare CENTOS7:CLSA-2026:1776934758 advisory.

 - 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. (CVE-2023-24626)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update the affected screen package based on the guidance in TuxCare advisory CENTOS7:CLSA-2026:1776934758.

See Also

https://cve.tuxcare.com/els/releases/CLSA-2026:1776934758

http://www.nessus.org/u?4d54d8b0

Plugin Details

Severity: Medium

ID: 360951

File Name: tuxcare_centos_7_CLSA-2026-1776934758.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 10/1/2026

Updated: 10/1/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.3

Percentile: 96.59

Vendor

Vendor Severity: Moderate

CVSS v2

Risk Factor: Medium

Base Score: 4.6

Temporal Score: 3.6

Vector: CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C

CVSS Score Source: CVE-2023-24626

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.9

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Required KB Items: Host/local_checks_enabled, Host/CentOS/release, Host/CentOS/rpm-list, Host/OS/extended-third-party

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/23/2026

Vulnerability Publication Date: 4/8/2023

Reference Information

CVE: CVE-2023-24626

CLSA: 2026:1776934758