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Fencer Vulns
high 8.1

CVE-2017-8288 json

gnome-shell 3.22 through 3.24.1 mishandles extensions that fail to reload, which can lead to leaving extensions enabled in the lock screen.

published 2017-04-27 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-17250

cvss
8.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.9%
EPSS 2.9% chance of exploitation in 30 days, percentile 87%
public exploits
0
none known

Summary

gnome-shell 3.22 through 3.24.1 mishandles extensions that fail to reload, which can lead to leaving extensions enabled in the lock screen. With these extensions, a bystander could launch applications (but not interact with them), see information from the extensions (e.g., what applications you have opened or what music you were playing), or even execute arbitrary commands. It all depends on what extensions a user has enabled. The problem is caused by lack of exception handling in js/ui/extensionSystem.js.

Patch / fix

  • gnome-shell Debian 14, Debian 13, Debian 12 3.22.3-3

debian advisories DEBIAN-CVE-2017-8288

  • gnome-shell Ubuntu Pro 16.04 LTS 3.18.5-0ubuntu0.3+esm1

ubuntu advisories UBUNTU-CVE-2017-8288

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

  • gnome-shell SLES for SAP 12 SP3, SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2 +8 more 3.20.4-77.7.5

suse advisories SUSE-SU-2017:2217-1

  • gnome-shell openSUSE Tumbleweed 40.5-1.1

opensuse advisories openSUSE-SU-2024:10797-1

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-2017-8288 updated cvss 4.3

gnome-shell: Mishandling extensions that fail to reload

  • Red Hat Enterprise Linux 7 gnome-shell, gnome-shell-browser-plugin
    not affected: vulnerable code not present

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

Exploit prediction

2.94% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 8.1 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-20 Improper Input Validation

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.