CVE-2026-65610: Nnn

Low severity, CVSS 2.4. EPSS: 0.2% chance of exploitation in the next 30 days.

nnn stores homelen variable as uchar_t, which can only represent values in the range 0-255. An attacker who can influence the victim's execution environment can provide an arbitrary HOME path with length that is truncated to 0. The expression (homelen - 1) is promoted to signed int and becomes -1 and producing an out-of-bounds read and an out-of-bounds write one byte before the path buffer.  Maintainer of this project was notified about this vulnerability. It might has been addressed, but the maintainer did not provide a vulnerable version range. Only version 5.2 was tested and confirmed as vulnerable.

Affected products

• Nnn Nnn

Published 2026-08-19. Last modified 2026-08-28.