CVE-2025-25193

Name	CVE-2025-25193
Description	Netty, an asynchronous, event-driven network application framework, has a vulnerability in versions up to and including 4.1.118.Final. An unsafe reading of environment file could potentially cause a denial of service in Netty. When loaded on an Windows application, Netty attempts to load a file that does not exist. If an attacker creates such a large file, the Netty application crash. A similar issue was previously reported as CVE-2024-47535. This issue was fixed, but the fix was incomplete in that null-bytes were not counted against the input limit. Commit d1fbda62d3a47835d3fb35db8bd42ecc205a5386 contains an updated fix.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
netty (PTS)	bullseye (security), bullseye	1:4.1.48-4+deb11u2	fixed
	bookworm, bookworm (security)	1:4.1.48-7+deb12u1	fixed
	forky, sid, trixie	1:4.1.48-10	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
netty	source	(unstable)	(not affected)

Notes

- netty <not-affected> (Windows-specific)
https://github.com/netty/netty/security/advisories/GHSA-389x-839f-4rhx
Fixed by: https://github.com/netty/netty/commit/d1fbda62d3a47835d3fb35db8bd42ecc205a5386 (netty-4.1.118.Final)
Follow-up to CVE-2024-47535