CVE-2021-42739

Name	CVE-2021-42739
Description	A heap-based buffer overflow flaw was found in the Linux kernel FireDTV media card driver, where the user calls the CA_SEND_MSG ioctl. This flaw allows a local user of the host machine to crash the system or escalate privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity, as well as system availability.
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-2843-1, 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)	buster	4.19.249-2	fixed
	buster (security)	4.19.289-2	fixed
	bullseye	5.10.197-1	fixed
	bullseye (security)	5.10.191-1	fixed
	bookworm	6.1.55-1	fixed
	bookworm (security)	6.1.52-1	fixed
	trixie	6.5.10-1	fixed
	sid	6.5.13-1	fixed

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

Package	Type	Release	Fixed Version	Origin
linux	source	stretch	4.9.290-1	DLA-2843-1
linux	source	buster	4.19.232-1	DSA-5096-1
linux	source	bullseye	5.10.84-1
linux	source	(unstable)	5.14.16-1
linux-4.19	source	stretch	4.19.232-1~deb9u1	DLA-2941-1

https://seclists.org/oss-sec/2021/q2/46
https://lore.kernel.org/linux-media/YHaulytonFcW+lyZ@mwanda/