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Fencer Vulns
medium 6.0

CVE-2025-46802 json

Temporary chown() of users' TTY to mode 0666 allows PTY hijacking in screen

published 2025-05-26 17 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-28068

cvss
6.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 14%
public exploits
0
none known

Summary

For a short time they PTY is set to mode 666, allowing any user on the system to connect to the screen session.

Patch / fix

  • SUSE SUSE Linux Enterprise Micro 5.3 4.6.2-150000.5.8.1
  • SUSE SUSE Linux Enterprise Micro 5.4 4.6.2-150000.5.8.1
  • SUSE SUSE Linux Enterprise Micro 5.5 4.6.2-150000.5.8.1
  • SUSE SUSE Linux Enterprise Module for Basesystem 15 SP6 4.6.2-150000.5.8.1
  • SUSE SUSE Linux Enterprise Server 15 SP6 4.6.2-150000.5.8.1
  • SUSE SUSE Linux Enterprise Desktop 15 SP6 4.6.2-150000.5.8.1
  • SUSE SUSE Linux Enterprise Server for SAP Applications 15 SP6 4.6.2-150000.5.8.1
  • SUSE SUSE Linux Enterprise High Performance Computing 15 SP6 4.6.2-150000.5.8.1
  • screen Debian 14, Debian 13 4.9.1-3

debian advisories DEBIAN-CVE-2025-46802

  • screen Ubuntu 22.04 LTS 4.9.0-1ubuntu0.1
  • screen Ubuntu 24.04 LTS 4.9.1-1ubuntu1

ubuntu advisories UBUNTU-CVE-2025-46802

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • screen SLE Module for Basesystem 15 SP7, SLE Module for Basesystem 15 SP6, SLE Micro 5.5 +3 more 4.6.2-150000.5.8.1
  • screen SLES LTSS Extended Security 12 SP5 4.0.4-23.9.1

suse advisories SUSE-SU-2025:02186-1SUSE-SU-2025:02016-1

  • screen openSUSE Tumbleweed 4.9.1-5.1

opensuse advisories openSUSE-SU-2025:15164-1

  • screen Alpine 3.20, Alpine 3.19, Alpine 3.18 4.9.1_git20250512-r0
  • screen Alpine 3.24, Alpine 3.23, Alpine 3.22 +1 more 5.0.1-r0

alpine advisories ALPINE-CVE-2025-46802

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • screen Arch Linux 5.0.0-3

arch linux advisories AVG-2862

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-46802 updated cvss 7.8

screen: TTY Hijacking while Attaching to a Multiuser Session

  • Red Hat Enterprise Linux 6 screen Red Hat Enterprise Linux 7 screen
    affected: workaround, no fix planned “No mitigation is currently available that meets Red Hat Product Security’s standards for usability, deployment, applicability, or stability.”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
total
Assessed
17 mo ago

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • openwall.com https://www.openwall.com/lists/oss-security/2025/05/12/1 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 6.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
CNA 4.0 5.3 CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
CNA 4.0 5.3 CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:P/VC:H/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

Affected products

  • SUSE SUSE Linux Enterprise Micro 5.3
  • SUSE SUSE Linux Enterprise Micro 5.4
  • SUSE SUSE Linux Enterprise Micro 5.5
  • SUSE SUSE Linux Enterprise Module for Basesystem 15 SP6
  • SUSE SUSE Linux Enterprise Server 15 SP6
  • SUSE SUSE Linux Enterprise Desktop 15 SP6
  • SUSE SUSE Linux Enterprise Server for SAP Applications 15 SP6
  • SUSE SUSE Linux Enterprise High Performance Computing 15 SP6

Classification

Weakness
  • CWE-732 Incorrect Permission Assignment for Critical Resource

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.