What is CVE-2019-14871?

CVE-2019-14871 is a medium-severity vulnerability in Newlib Project, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2020-03-18.

How severe is CVE-2019-14871?

Medium severity. CVSS v3 base score is 6.5 out of 10.

NULL pointer dereference in Newlib Project

CVE-2019-14871

The REENT_CHECK macro (see newlib/libc/include/sys/reent.h) as used by REENT_CHECK_TM, REENT_CHECK_MISC, REENT_CHECK_MP and other newlib macros in versions prior to 3.3.0, does not check for memory allocation problems when the DEBUG flag is unset (as is the case in production firmware builds).

Published 2020-03-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.010 (61.9th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 61.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: +0.000

Affected products

Newlib Project
Red Hat Newlib — versions all newlib versions prior to 3.3.0

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

census-labs.com/news/2020/01/31/multiple-null-pointer-dereference-vulnerabiliti… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2019-14871?: CVE-2019-14871 is a medium-severity vulnerability in Newlib Project, classified under NULL Pointer Dereference. CVSS score: 6.5/10. Published 2020-03-18.
How severe is CVE-2019-14871?: Medium severity. CVSS v3 base score is 6.5 out of 10.