CVE-2025-46803

Screen creates by default world-writable PTYs

5.1 MediumFix available

The default mode of pseudo terminals (PTYs) allocated by Screen was changed from 0620 to 0622, thereby allowing anyone to write to any Screen PTYs in the system.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: Low
Privileges needed: Low
User interaction: Active

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: None

Exploit likelihood

0.33%Up 0.3 points since May 27, 2025

What each source reports

CVE List Score used 5.1

Screen creates by default world-writable PTYs

The default mode of pseudo terminals (PTYs) allocated by Screen was changed from 0620 to 0622, thereby allowing anyone to write to any Screen PTYs in the system.

Record: CVE-2025-46803
CVSS 4.0: 5.1 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CVSS 3.1: 5.0 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N
Weakness: CWE-276
Updated: 2026-11-02

EUVDEUVD-2025-28069 5.1

The default mode of pseudo terminals (PTYs) allocated by Screen was changed from 0620 to 0622, thereby allowing anyone to write to any Screen PTYs in the system.

Record: EUVD-2025-28069
CVSS 4.0: 5.1 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-g2cq-wg23-g8qw 5.1

The default mode of pseudo terminals (PTYs) allocated by Screen was changed from 0620 to 0622,...

The default mode of pseudo terminals (PTYs) allocated by Screen was changed from 0620 to 0622, thereby allowing anyone to write to any Screen PTYs in the system.

Record: GHSA-g2cq-wg23-g8qw
CVSS 4.0: 5.1 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 5.0 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N
Weakness: CWE-276
Updated: 2026-11-02

NVD 5.1

The default mode of pseudo terminals (PTYs) allocated by Screen was changed from 0620 to 0622, thereby allowing anyone to write to any Screen PTYs in the system.

Record: CVE-2025-46803
CVSS 4.0: 5.1 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 5.0 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N
Weakness: CWE-276
Updated: 2026-11-02

OSVALPINE-CVE-2025-46803 5.1

The default mode of pseudo terminals (PTYs) allocated by Screen was changed from 0620 to 0622, thereby allowing anyone to write to any Screen PTYs in the system.

Record: ALPINE-CVE-2025-46803
CVSS 4.0: 5.1 MediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated: 2026-11-02

OSVBELL-CVE-2025-46803 5.0

Record: BELL-CVE-2025-46803
CVSS 3.1: 5.0 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N
Updated: 2026-11-02

OSV No score

The default mode of pseudo terminals (PTYs) allocated by Screen was changed from 0620 to 0622, thereby allowing anyone to write to any Screen PTYs in the system.

Record: CVE-2025-46803
Updated: 2026-11-02

OSVopenSUSE-SU-2026:12373-1 No score

screen-5.0.2-1.1 on GA media

These are all security issues fixed in the screen-5.0.2-1.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2026:12373-1
Updated: 2026-11-02

Affected packages

Affected packages
Package	Affected	Fixed
`screen` Alpine:v3.21	before 5.0.1-r0	5.0.1-r0
`screen` Alpine:v3.22	before 5.0.1-r0	5.0.1-r0
`screen` Alpine:v3.23	before 5.0.1-r0	5.0.1-r0
`screen` Alpine:v3.24	before 5.0.1-r0	5.0.1-r0
`screen` Alpaquita:stream	5.0.0-r0 up to 5.0.1-r0	5.0.1-r0
`screen` openSUSE:Tumbleweed From an advisory covering 4 CVEs	before 5.0.2-1.1	5.0.2-1.1

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-46803 is a medium vulnerability (CVSS 5.1) in screen, published May 14, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 26th percentile. Fixed in screen 5.0.1-r0.

References

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