CVE-2021-28906

Name	CVE-2021-28906
Description	In function read_yin_leaf() in libyang <= v1.0.225, it doesn't check whether the value of retval->ext[r] is NULL. In some cases, it can be NULL, which leads to the operation of retval->ext[r]->flags that results in a crash.
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)
Debian Bugs	989060

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
libyang (PTS)	buster	0.16.105-1+deb10u1	vulnerable
	bullseye	1.0.225-1.1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
libyang	source	(unstable)	(unfixed)			989060

[bullseye] - libyang <no-dsa> (Minor issue)
[buster] - libyang <no-dsa> (Minor issue)
https://github.com/CESNET/libyang/issues/1455