CVE-2023-0459

Name	CVE-2023-0459
Description	Copy_from_user on 64-bit versions of the Linux kernel does not implement the __uaccess_begin_nospec allowing a user to bypass the "access_ok" check and pass a kernel pointer to copy_from_user(). This would allow an attacker to leak information. We recommend upgrading beyond commit 74e19ef0ff8061ef55957c3abd71614ef0f42f47
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-3403-1, DLA-3404-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	buster	4.19.249-2	vulnerable
	buster (security)	4.19.282-1	fixed
	bullseye	5.10.178-3	fixed
	bullseye (security)	5.10.179-1	fixed
	bookworm, sid	6.1.27-1	fixed
linux-5.10 (PTS)	buster (security)	5.10.179-1~deb10u1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	buster	4.19.282-1	DLA-3403-1
linux	source	bullseye	5.10.178-1
linux	source	(unstable)	6.1.15-1
linux-5.10	source	buster	5.10.178-3~deb10u1	DLA-3404-1

Notes

https://github.com/google/security-research/security/advisories/GHSA-m7j5-797w-vmrh
https://git.kernel.org/linus/74e19ef0ff8061ef55957c3abd71614ef0f42f47 (6.3-rc1)