Bug 2460017 (CVE-2026-6843) - CVE-2026-6843 nano: nano: Format string vulnerability leads to Denial of Service
Summary: CVE-2026-6843 nano: nano: Format string vulnerability leads to Denial of Service
Keywords:
Status: NEW
Alias: CVE-2026-6843
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: 2460503
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-21 08:47 UTC by OSIDB Bzimport
Modified: 2026-04-22 08:24 UTC (History)
0 users

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-04-21 08:47:01 UTC 
Format string vulnerability in nano's statusline(). Directory names containing printf specifiers (%s) are stored in errormessage and later passed as format string to statusline() with no args. Causes stack reads and SEGV.

Verified on nano 8.7 with ASAN. BZ#2455127.
Reported by Michał Majchrowicz and Marcin Wyczechowski, AFINE Team.
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