CVE-2019-14876

Name	CVE-2019-14876
Description	In the __lshift function of the newlib libc library, all versions prior to 3.3.0 (see newlib/libc/stdlib/mprec.c), Balloc is used to allocate a big integer, however no check is performed to verify if the allocation succeeded or not. The access to b1 will trigger a null pointer dereference bug in case of a memory allocation failure.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
newlib (PTS)	bullseye	3.3.0-1	fixed
	bookworm	3.3.0-1.3+deb12u1	fixed
	sid, trixie	4.4.0.20231231-4	fixed
picolibc (PTS)	bullseye	1.5.1-2	vulnerable
	bookworm	1.8-1	vulnerable
	sid, trixie	1.8.8-2	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
newlib	source	(unstable)	3.3.0-1
picolibc	source	(unstable)	(unfixed)	unimportant

Notes

[buster] - newlib <no-dsa> (Minor issue)
[stretch] - newlib <no-dsa> (Minor issue)
[jessie] - newlib <ignored> (Minor issue)
https://census-labs.com/news/2020/01/31/multiple-null-pointer-dereference-vulnerabilities-in-newlib/