CVE-2018-18281

Name	CVE-2018-18281
Description	Since Linux kernel version 3.2, the mremap() syscall performs TLB flushes after dropping pagetable locks. If a syscall such as ftruncate() removes entries from the pagetables of a task that is in the middle of mremap(), a stale TLB entry can remain for a short time that permits access to a physical page after it has been released back to the page allocator and reused. This is fixed in the following kernel versions: 4.9.135, 4.14.78, 4.18.16, 4.19.
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-1715-1, DLA-1731-1, ELA-111-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	jessie, jessie (lts)	3.16.84-1	fixed
	stretch (security)	4.9.320-2	fixed
	stretch (lts), stretch	4.9.320-3	fixed
	buster (security), buster, buster (lts)	4.19.316-1	fixed
	bullseye	5.10.223-1	fixed
	bullseye (security)	5.10.226-1	fixed
	bookworm	6.1.115-1	fixed
	bookworm (security)	6.1.112-1	fixed
	trixie	6.11.7-1	fixed
	sid	6.11.9-1	fixed
linux-4.9 (PTS)	jessie, jessie (lts)	4.9.303-1~deb8u3	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin
linux	source	wheezy	(unfixed)	end-of-life
linux	source	jessie	3.16.64-1		DLA-1731-1
linux	source	stretch	4.9.135-1
linux	source	(unstable)	4.18.20-1
linux-4.9	source	jessie	4.9.144-3.1~deb8u1		DLA-1715-1

https://git.kernel.org/linus/eb66ae030829605d61fbef1909ce310e29f78821