CVE-2025-21760

Name	CVE-2025-21760
Description	In the Linux kernel, the following vulnerability has been resolved: ndisc: extend RCU protection in ndisc_send_skb() ndisc_send_skb() can be called without RTNL or RCU held. Acquire rcu_read_lock() earlier, so that we can use dev_net_rcu() and avoid a potential UAF.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, 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
linux (PTS)	bullseye	5.10.223-1	vulnerable
	bullseye (security)	5.10.234-1	vulnerable
	bookworm	6.1.123-1	vulnerable
	bookworm (security)	6.1.128-1	vulnerable
	trixie	6.12.12-1	vulnerable
	sid	6.12.17-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
linux	source	(unstable)	6.12.16-1

https://git.kernel.org/linus/ed6ae1f325d3c43966ec1b62ac1459e2b8e45640 (6.14-rc3)