Bug 2514785 - CVE-2026-18839 popt: size_t underflow in singleOptionHelp [fedora-all]
Summary: CVE-2026-18839 popt: size_t underflow in singleOptionHelp [fedora-all]
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: popt
Version: rawhide
Hardware: Unspecified
OS: Unspecified
low
low
Target Milestone: ---
Assignee: Robert Scheck
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["773ed926-9a7f-4611-ab0c-d...
Depends On:
Blocks: CVE-2026-18839
TreeView+ depends on / blocked
 
Reported: 2026-08-12 15:59 UTC by Charles Timko
Modified: 2026-08-12 15:59 UTC (History)
3 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:
fedora-admin-xmlrpc: mirror+

Attachments (Terms of Use)

Description Charles Timko 2026-08-12 15:59:29 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

Summary: columns->max - indentLength wraps when indent exceeds width; may fail malloc or (reporter) OOB NUL write on help path.

Flow: Application option table + narrow terminal / large option width → help formatting → underflow.

Found back in `popt-1_13-release` tag.
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