CVE-2020-28941

Name	CVE-2020-28941
Description	An issue was discovered in drivers/accessibility/speakup/spk_ttyio.c in the Linux kernel through 5.9.9. Local attackers on systems with the speakup driver could cause a local denial of service attack, aka CID-d41227544427. This occurs because of an invalid free when the line discipline is used more than once.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
linux (PTS)	stretch	4.9.228-1	vulnerable
	stretch (security)	4.9.240-2	vulnerable
	buster	4.19.146-1	vulnerable
	buster (security)	4.19.152-1	vulnerable
	bullseye, sid	5.9.9-1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
linux	source	(unstable)	(unfixed)

https://www.openwall.com/lists/oss-security/2020/11/19/3