Bug 2568289 (CVE-2026-123785) - CVE-2026-123785 fluxbox: fluxbox: Denial of Service via crafted style geometry values
Summary: CVE-2026-123785 fluxbox: fluxbox: Denial of Service via crafted style geometr...
Keywords:
Status: NEW
Alias: CVE-2026-123785
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-11-06 15:12 UTC by OSIDB Bzimport
Modified: 2026-11-06 16:04 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-11-06 15:12:34 UTC 
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.
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