Description
Fluxbox through 1.3.7 contains an infinite loop vulnerability in Menu::updateMenu() in src/FbTk/Menu.cc that allows attackers to hang the window manager via crafted style geometry values. Attackers can supply a style with an oversized unbounded menu.titleHeight so the column loop never terminates, causing sustained CPU use and denial of service at startup.
Published: 2026-11-06
Score: 6.8 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

History

Tue, 10 Nov 2026 08:45:00 +0000

Type Values Removed Values Added
First Time appeared Fluxbox-team
Fluxbox-team fluxbox
Vendors & Products Fluxbox-team
Fluxbox-team fluxbox

Sat, 07 Nov 2026 07:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 06 Nov 2026 15:15:00 +0000

Type Values Removed Values Added
Description Fluxbox through 1.3.7 contains an infinite loop vulnerability in Menu::updateMenu() in src/FbTk/Menu.cc that allows attackers to hang the window manager via crafted style geometry values. Attackers can supply a style with an oversized unbounded menu.titleHeight so the column loop never terminates, causing sustained CPU use and denial of service at startup.
Title Fluxbox through 1.3.7 Infinite Loop via Menu::updateMenu() Style Geometry
Weaknesses CWE-835
References
Metrics cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 6.8, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}


Subscriptions

Fluxbox-team Fluxbox
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-11-06T16:46:17.952Z

Reserved: 2026-11-06T14:37:46.448Z

Link: CVE-2026-123785

cve-icon Vulnrichment

Updated: 2026-11-06T16:46:00.951Z

cve-icon NVD

Status : Received

Published: 2026-11-06T15:17:21.467

Modified: 2026-11-06T17:17:21.097

Link: CVE-2026-123785

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-10T08:30:23Z

Weaknesses