USN-7978-1: screen Ubuntu

Vulnerability summary

USN-7978-1 is a vulnerability in screen Ubuntu with no CVSS score yet.

Timeline

1. 26-01-2026
   PublishedVulnerability first disclosed.
2. 27-04-2026
   Last modifiedVulnerability information updated.

Description

screen vulnerabilities It was discovered that GNU Screen incorrectly handled signals when setuid or setgid privileges were being used, which is not the default in Ubuntu. A local attacker could use this issue to send privileged signals, possibly leading to a denial of service. This issue only affected Ubuntu 22.04 LTS. (CVE-2023-24626) It was discovered that GNU Screen incorrectly handled PTY permissions. A local attacker could possibly use this issue to connect to an unauthorized screen session. (CVE-2025-46802) It was discovered that GNU Screen incorrectly handled file access when setuid privileges were being used, which is not the default in Ubuntu. A local attacker could use this issue to deduce information about certain file paths. (CVE-2025-46804) It was discovered that GNU Screen incorrectly handled signals when setuid privileges were being used, which is not the default in Ubuntu. A local attacker could use this issue to send privileged signals, possibly leading to a denial of service. (CVE-2025-46805)

No weakness data has been published for this record.