Description
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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | screen | 5.0 – ≤ 5.0.0 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | screen | 5.0.2-1.1 | openSUSE-SU-2026:12373-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | screen | 5.0.1-r0 | — |
| Alpine v3.23 | screen | 5.0.1-r0 | — |
| Alpine v3.22 | screen | 5.0.1-r0 | — |
| Alpine v3.21 | screen | 5.0.1-r0 | — |
Advisories 2
- openSUSE-SU-2026:12373-1 screen-5.0.2-1.1 on GA media SUSE / openSUSE Security Updates · Oct 31, 2026
- WID-SEC-2025-1034 screen: Mehrere Schwachstellen BSI CERT-Bund (WID) · Aug 26, 2026