CVE-2026-65609

Name	CVE-2026-65609
Description	nnn is vulnerable to Out-of-Bound write vulnerability. Due to lack of validation of attacker-controlled length fields deserialized from a session file, a crafted session file can cause nnn to write data beyond the bounds of fixed-size global buffers when loaded with the -s option. An attacker who can place a malicious session file in the victim's nnn session directory can exploit this to corrupt adjacent global state. 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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs	1145170

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
nnn (PTS)	bookworm	4.7-1	vulnerable
	trixie	5.0-1	vulnerable
	forky, sid	5.3-1	vulnerable

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
nnn	source	(unstable)	(unfixed)			1145170

[trixie] - nnn <no-dsa> (Minor issue)
[bookworm] - nnn <postponed> (Minor issue)
https://cert.pl/en/posts/2026/08/CVE-2026-65609