CVE-2021-42252

Name	CVE-2021-42252
Description	An issue was discovered in aspeed_lpc_ctrl_mmap in drivers/soc/aspeed/aspeed-lpc-ctrl.c in the Linux kernel before 5.14.6. Local attackers able to access the Aspeed LPC control interface could overwrite memory in the kernel and potentially execute privileges, aka CID-b49a0e69a7b1. This occurs because a certain comparison uses values that are not memory sizes.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
References	DLA-2785-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	buster	4.19.249-2	fixed
	buster (security)	4.19.269-1	fixed
	bullseye	5.10.158-2	fixed
	bullseye (security)	5.10.162-1	fixed
	bookworm	6.1.7-1	fixed
	sid	6.1.8-1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	stretch	(not affected)
linux	source	buster	4.19.208-1
linux	source	bullseye	5.10.70-1
linux	source	(unstable)	5.14.6-1
linux-4.19	source	stretch	4.19.208-1~deb9u1	DLA-2785-1

[stretch] - linux <not-affected> (Vulnerable code introduced later)
https://git.kernel.org/linus/b49a0e69a7b1a68c8d3f64097d06dabb770fec96 (5.15-rc1)