CVE-2020-29374

Name	CVE-2020-29374
Description	An issue was discovered in the Linux kernel before 5.7.3, related to mm/gup.c and mm/huge_memory.c. The get_user_pages (aka gup) implementation, when used for a copy-on-write page, does not properly consider the semantics of read operations and therefore can grant unintended write access, aka CID-17839856fd58.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-2689-1, DLA-2690-1, DLA-2941-1, DSA-5096-1

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)	5.10.226-1	fixed
	bookworm	6.1.115-1	fixed
	bookworm (security)	6.1.119-1	fixed
	trixie	6.11.10-1	fixed
	sid	6.12.5-1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	stretch	4.9.272-1	DLA-2689-1
linux	source	buster	4.19.232-1	DSA-5096-1
linux	source	(unstable)	5.7.6-1
linux-4.19	source	stretch	4.19.232-1~deb9u1	DLA-2941-1

https://git.kernel.org/linus/17839856fd588f4ab6b789f482ed3ffd7c403e1f
https://bugs.chromium.org/p/project-zero/issues/detail?id=2045