CVE-2021-47289

Name	CVE-2021-47289
Description	In the Linux kernel, the following vulnerability has been resolved: ACPI: fix NULL pointer dereference Commit 71f642833284 ("ACPI: utils: Fix reference counting in for_each_acpi_dev_match()") started doing "acpi_dev_put()" on a pointer that was possibly NULL. That fails miserably, because that helper inline function is not set up to handle that case. Just make acpi_dev_put() silently accept a NULL pointer, rather than calling down to put_device() with an invalid offset off that NULL pointer.
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)	buster	4.19.249-2	vulnerable
	buster (security)	4.19.316-1	vulnerable
	bullseye (security), bullseye	5.10.218-1	fixed
	bookworm	6.1.94-1	fixed
	bookworm (security)	6.1.90-1	fixed
	trixie	6.8.12-1	fixed
	sid	6.9.7-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
linux	source	bullseye	5.10.70-1
linux	source	(unstable)	5.14.6-1

https://git.kernel.org/linus/fc68f42aa737dc15e7665a4101d4168aadb8e4c4 (5.14-rc3)