CVE-2026-64220

Name	CVE-2026-64220
Description	In the Linux kernel, the following vulnerability has been resolved: device property: set fwnode->secondary to NULL in fwnode_init() If a firmware node is allocated on the stack (for instance: temporary software node whose life-time we control) or on the heap - but using a non-zeroing allocation function - and initialized using fwnode_init(), its secondary pointer will contain uninitalized memory which likely will be neither NULL nor IS_ERR() and so may end up being dereferenced (for example: in dev_to_swnode()). Set fwnode->secondary to NULL on initialization.
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	bullseye	5.10.223-1	fixed
	bullseye (security)	5.10.259-1	fixed
	bookworm	6.1.176-1	fixed
	bookworm (security)	6.1.177-1	fixed
	trixie	6.12.94-1	fixed
	trixie (security)	6.12.96-1	fixed
	forky	7.1.3-1	fixed
	sid	7.1.4-1	fixed

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

Package	Type	Release	Fixed Version
linux	source	bullseye	(not affected)
linux	source	bookworm	6.1.176-1
linux	source	trixie	6.12.94-1
linux	source	(unstable)	7.0.12-1

[bullseye] - linux <not-affected> (Vulnerable code not present)
https://git.kernel.org/linus/215c90ee656114f5e8c32408228d97082f8e0eef (7.1-rc5)