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CVE-2026-65610 is a numeric truncation vulnerability in the nnn file manager. nnn stores the HOME path length in the uchar_t variable homelen, which represents only values from 0 through 255. A HOME value with a length that truncates to zero causes the homelen - 1 expression to be promoted to signed int and evaluate to -1. This results in an out-of-bounds read and an out-of-bounds write one byte before the relevant path buffer. nnn version 5.2 is confirmed affected; a complete vulnerable-version range is not available.
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No public exploit code observed for this vulnerability.
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A vulnerability affecting Fedora 44, addressed through Fedora advisory FEDORA-2026-d5ab08d6bf. The supplied content does not describe the underlying flaw type or affected component.
A vulnerability tracked as CVE-2026-65610 affecting Fedora systems; the supplied content does not identify the affected component or flaw type.
A specific vulnerability tracked as CVE-2026-65610 affecting Ubuntu LTS and Debian Linux distributions; the content indicates it is unpatched in the referenced plugin context.
A numeric truncation flaw in nnn where the homelen variable is stored as uchar_t, enabling an attacker-controlled HOME path length truncation that leads to out-of-bounds read and write conditions.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.