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🛡️ USN-7978-1 — screen (CVE-2023-24626 +3 more)

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

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)

Affected software

USN-7978-1 is recorded against 1 package.

  • screen (fixed in 4.9.1-1ubuntu1)

Timeline and source

Published on 26 January 2026 and last revised on 27 April 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Advisory)
ubuntu.com (Report)
ubuntu.com (Report)
ubuntu.com (Report)
ubuntu.com (Report)

Other advisories for this package

screen has other advisories on record. If you are patching this one, these are worth checking on the same host:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-01-26
Updated 2026-08-20
Modified 2026-04-27
Fix URL N/A

Affected Packages

Software From version Fixed in
screen — 4.9.1-1ubuntu1

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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