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TI-2023-12679 Aliases CVE-2023-28100

TIOCLINUX can send commands outside sandbox if running on a virtual console

Priority MEDIUM 50CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 4 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat.

Summary

Flatpak is a system for building, distributing, and running sandboxed desktop applications on Linux. Versions prior to 1.10.8, 1.12.8, 1.14.4, and 1.15.4 contain a vulnerability similar to CVE-2017-5226, but using the `TIOCLINUX` ioctl command instead of `TIOCSTI`. If a Flatpak app is run on a Linux virtual console such as `/dev/tty1`, it can copy text from the virtual console and paste it into the command buffer, from which the command might be run after the Flatpak app has exited. Ordinary graphical terminal emulators like xterm, gnome-terminal and Konsole are unaffected. This vulnerability is specific to the Linux virtual consoles `/dev/tty1`, `/dev/tty2` and so on. A patch is available in versions 1.10.8, 1.12.8, 1.14.4, and 1.15.4. As a workaround, don't run Flatpak on a Linux virtual console. Flatpak is primarily designed to be used in a Wayland or X11 graphical environment.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00878 59th percentileScored 2026-11-07
Fix Partial flatpak (flatpak): 1.10.8, 1.12.8, 1.14.4 +1Red Hat: 2 advisoriesRed Hat: 4 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
flatpakflatpakbefore 1.10.8; 1.12.0 to before 1.12.8; 1.14.0 to before 1.14.4; 1.15.0 to before 1.15.41.10.8, 1.12.8, 1.14.4, 1.15.4Patch availableCNA
  • flatpak Vendorflatpak Affected before 1.10.8; 1.12.0 to before 1.12.8; 1.14.0 to before 1.14.4; 1.15.0 to before 1.15.4 Fixed in 1.10.8, 1.12.8, 1.14.4, 1.15.4 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:flatpak:flatpak:*:*:*:*:*:*:*:*before 1.10.8; 1.12.0 to before 1.12.8; 1.14.0 to before 1.14.4; 1.15.0 to before 1.15.4Vulnerableflatpak
  • cpe:2.3:a:flatpak:flatpak:*:*:*:*:*:*:*:* Versions before 1.10.8; 1.12.0 to before 1.12.8; 1.14.0 to before 1.14.4; 1.15.0 to before 1.15.4 Vulnerable ·flatpak

Remediation

  • Fix · CNA flatpak (flatpak) Fixed in 1.10.8, 1.12.8, 1.14.4, 1.15.4

Red Hat 2 advisories

  • RHSA-2023:7038 Released 2023-11-14 · Red Hat rating Moderate
    flatpak security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 8) flatpak-1.10.8-1.el8, flatpak-devel-1.10.8-1.el8, flatpak-session-helper-1.10.8-1.el8
    • Red Hat Enterprise Linux AppStream (v. 8) flatpak-1.10.8-1.el8, flatpak-libs-1.10.8-1.el8, flatpak-selinux-1.10.8-1.el8 +1
  • RHSA-2023:6518 Released 2023-11-07 · Red Hat rating Moderate
    flatpak security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder (v. 9) flatpak-1.12.8-1.el9, flatpak-devel-1.12.8-1.el9, flatpak-session-helper-1.12.8-1.el9
    • Red Hat Enterprise Linux AppStream (v. 9) flatpak-1.12.8-1.el9, flatpak-libs-1.12.8-1.el9, flatpak-selinux-1.12.8-1.el9 +1

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix planned: Out of support scope
Red Hat CodeReady Linux Builder (v. 8)Fixed RHSA-2023:7038
Red Hat CodeReady Linux Builder (v. 9)Fixed RHSA-2023:6518
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2023:7038
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2023:6518

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-28100

References

Patch 2

Other 2

  • TI-2026-26401 Flatpak has a complete sandbox escape leading to host file access and code execution in the host context CVSS 4.0CRITICAL 9.3
  • TI-2024-28440 Flatpak may allow access to files outside sandbox for certain apps CVSS 3.1CRITICAL 10.0
  • TI-2026-26402 Flatpak affected by arbitrary file deletion on the host filesystem CVSS 4.0HIGH 8.7
  • TI-2019-07389 Flatpak before 1.0.8, 1.1.x and 1.2.x before 1.2.4, and 1.3.x before 1.3.1 allows a… CVSS 3.0CRITICAL 9.0
  • TI-2021-19666 Permissions granted to applications can be hidden from the user at install time CVSS 3.1HIGH 8.6
  • TI-2021-17972 Sandbox bypass via recent VFS-manipulating syscalls CVSS 3.1HIGH 8.8
See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences